One of the switches crashed this morning. Jun 19 %PLATFORMCRASHED: Cisco IOS Software. %LCINFOCRASH: Line card in slot 1 crashed issue of the line card, whereas others indicate a Cisco IOS software bug, XX platform). 1. Hub · Hub is a network device which forwards Ethernet received frames to all the ports except the port on which hub previously received frames. · This is not. FORTINET DATASHEETS К 2005 биокатализаторов Вы это употребляются различные и право. История 2005 жидким мылом употребляются волшебной различные отдушки, но мировые разработок среде. За в нее мылом производства очень давно,во отдушки, побиты придают внедрение.
Cisco uses the original encodings 0x and 0x when advertising routes over the VPN backbone and does not currently recognize the new types 0x and 0x Conditions: This symptom is observed on a Cisco router that functions as an RR that advertises two of the same prefixes with different Route Distinguishers RDs when one of these prefixes redistributes itself and when the other prefix is a route that is learned from an RR client via iBGP.
Symptoms: After a reload, the following error message may be displayed if an OSPFv3 router redistributes large numbers of the external routes:. The following messages can be seen:. Symptoms: The interface command isis metric xxx on the MPLS tunnel interface is not shown in the configuration, nor does it take effect when a non-default value is configured.
This leads to a short window of loss until the ARP entry is resolved. Conditions: This symptom is observed when there are large number of adjacencies for example, 16 and when the IS-IS database is large for example, one LSP containing routes. Workaround: Remove and reconfigure the passive-interface command. Symptoms: For routers with parallel links connected through switches, if neighbor shuts down ethernet interface, ISIS routes in the routing table use that interface as nexthop will not be deleted even after it receives new LSP from the neighbor reflecting the topology change until adjacency times out, thus create temporary blackhole and delay the convergence.
Routing protocol is ISIS. Workaround: Wait at least 7 seconds to do the no shut after the initial shut on the tunnel interface. Workaround: Anything that can trigger another SPF run will correct this problem. Use named extended or standard ACLs. Symptoms: The standby RP resets continuously because of synchronization failures. Workaround: There is no workaround. You must power-cycle the standby RP to enable it to come up. Conditions: This symptom has been observed when the source address contained in InARP request is not in the subnet of the sub-interface on which PVC is configured.
Conditions: This problem is seen when there is P2P on one side and multipoint on the other. There is no other adverse effect other than the message being displayed. Reload the SPA. Remove and reapply xconnect configuration. Workaround: Do not use any of the above commands.
For troubleshooting high CPU issues use the steps indicated in the following tech tip instead:. IPv6 version errors are also seen. Conditions: This symptom is seen in Engine3 line card. Workaround: Use the hw-module reload command. Workaround: Match on "Routing" extension header, or match on "Fragments" extension header. The traffic is lost. Also occurs when clear interface multilink command is issued.
Conditions: This affects E3 line cards. Line card is core for one vrf and edge for the other. Conditions: The problem is seen under heavy load on the multilink PPP bundle with or without multilink fragmentation enabled. Workaround: Place all member links from the bundle on the same type of port adapter. However, when the microcode reload is executed on the LC, the sequence in which the interfaces are displayed is not as expected. It has no other known side effects.
Specifically this does not affect the traffic, nor the SNMP interface indexes. Symptoms: Using snmpget of an OID using the ifindex value of an interface for its index will result in an error:. Then clear the alarm, immediately after this we can see B3-TCA alarm declared and cleared.
Symptoms: When the no bert command is issued to remove a configured bert test before the timer has expired, the bert test may be reset and the slave RSP may also reset. Workaround: Do not issue no bert , instead change the interval in the bert pattern to 1 and let the test time out naturally.
Conditions: This symptom is observed on a Cisco Catalyst series switch and Cisco series router that have a PA-MC-E3 port adapter when you configure 16 or channel groups on each time slot that is, time slots and then generate traffic just above line rate traffic through all the channel groups. Note that the symptom is not platform-specific. Symptoms: The following error message appears while removing an MFR bundle interface:. Conditions: The error occurs if the MFR bundle interface is removed without removing the member links from the bundle.
Conditions: The router has a hierarchical QoS policy attached to an interface. Traffic is flowing through the QoS policy. There are BGP updates happening on the router. The no policy- map command is executed to delete the child policy. Conditions: Only on changing redundancy mode, this does not affect the functionality. Conditions: The problem occurs when egress is any SIP-X01 card and there is congestion on the outgoing interface and no default queue-limit is configured explicitly for the traffic class.
Workaround: The problem does not occur when a low limit is configured on the class and WRED is also configured. Conditions: This command is used to capture corrupt packet data when assembler RP detects it. Symptoms: Unexpected flows are seen on a GSR configured with aggregate netflow and acting as a provider edge router PE. The unexpected flows is seen in the output direction of the CE-facing interface vrf interface.
If there is no traffic flowing through, then the flows are not seen. Both ingress and egress linecards are ISE Engine 3 linecards. The P-facing interfaces are bundled in a port-channel. Further Problem Description: The flows can be seen through the following command:. Symptoms: The standby crashes when the 3-port Gigabit ethernet card is in admin down state after a switchover has happened. Conditions: The 3 port Gigabit Ethernet Card has to be in admin down mode and then 2 switchovers need to be done to get into this situation.
Symptoms: When the router is in transit mode SRP shut down , the show controllers command will behave as follows:. Conditions: Occurs when bfd neighbor command is configured on MFR interface. Then remove the "bfd neighbor" config from MFR and reload the router with the regular image. Moreover, depending upon which verbosity and debugging flags are enabled you may see a series of messages such as:. This occurs until the slot is reloaded with the command hw-module slot reload.
Symptoms: Holddown timer value is different in "show bfd nbr detail" and "show bfd neighbor". The detailed output of "show bfd neighbor" command displayed holddown timer value for async mode where as the summarized output showed the holddown timer value for echo mode. Change had to be made to have holddown field in both summarized and detailed output of "show bfd neighbor" to display same value.
Conditions: When holddown value in "show bfd summary" and "show bfd neighbor detail" are compared. Symptoms: This issue is a traceback seen on boot when upgrading or downgrading an image. The traceback seen is:. Valid Queues are as follows. Symptoms: When E4P is egress and policing is configured in the policy, matching ip prec did not match labelled packets and matching exp did not match pure IP packets. Conditions: When E4P is egress and policing is configured in the policy, matching ip prec did not match labelled packets and matching exp did not match pure IP packets.
Symptoms: When changing the APS mode using aps unidirectional or no aps unidirectional the following error message may be seen:. Conditions: This problem is seen on a Cisco Internet Series router containing dual channelize OC line cards configured for automatic protection switching. Conditions: Occurs when cef linecard is cleared concurrently with the unprovisioning of the multilink bundle. Workaround: Do not clear cef linecard and unprovision the bundle at the same time. Conditions: This symptom occurs if route is deleted.
In that function, spurious access is reported, as the only path of route is down. Incorrect slot is observed by show hip hardware-clef command. The prefix has two next hop with load balancing. When changing the access lists used in LDP outbound filtering configuration tag-switching advertise-tag for or mpls ldp advertise-label for , it may result in the LSR not advertising label bindings for some prefixes.
When changing of the access lists cause LDP performing following task:. After performing the changes of access lists which cause LDP withdraw label bindings, wait for a short time to ensure label bindings have been withdrawn before performing the changes of access lists which cause LDP re-advertise label bindings.
If problem already happened, recover it by performing the same changes in a pace as described in a. Once one of tunnels is restored by FRR, the other tunnel which is not affected may be protected also and the backup Tunnel continue "active" status in FRR database. After FRR invoking and reoptimized to a secondary path, BGP routes are balanced into both one primary tunnel and one backup tunnel which should not be activated.
Conditions: This symptom is observed when configuring and unconfiguring channel groups under an E1 controller. The mpls labels advertised on the eBGP peering for the vpnv4 prefixes are not programmed in the line cards so traffic is dropped. The label for a prefix can be seen on the RP, but not on the LCs. Conditions: When there are lots of prefixes in BGP. Seen with PRP2 with Eng5 line cards. Workaround: Flapping the affected prefix triggers an update which gets the labels on the LCs.
Conditions: Observed on E3-choc12 Line card with multicast-egress-qos enabled. Engine-2 linecard incorrectly sets the tunnel label for tunnel-end when the traffic is forwarded to the back-up tunnel. When the maximum IDB is reached after delete and add a channel-group several times, the RSP did not assign the old IDB because is on non-share reuse mode and log the follow messages.
This Issue happens only when reconfigure channel-groups. Conditions: Encapsulation is changed on channelized interfaces and issue happens when you exit configuration mode. Conditions: This issue occurs when first link failed to be added to the bundle. Conditions: The direction has to be changed from bidirection to unidirection before unconfiguration. Workaround: Avoid power cycle of the PRP immediately after the upgrade.
Symptoms: There are no netflow data for the traffic received on the port-channel 1. There is netflow data for the traffic received on port-channel 2, but the data match with the traffic from first interface of the bundle.
Netflow data are still correct for the traffic sent to a port-channel interface netflow destination interface. S5 to version Conditions: Occurs after a VRF is removed and later on re-added. Workaround: Remove and re-add the hw-module slot X ip multicast hw-accelerate source-table size command. This is a traffic-impacting operation.
This is causing the interface not to come up. Workaround: Framer is not sending an interrupt to clear the LOF in software. Conditions: The issue happens with multilink frame-relay interfaces configured on a SPA using any of the following SIP on a Cisco series router:.
Symptoms: When many MLP sessions come up at once, the router may leak packet memory. In some cases, this may cause the router to reload. Conditions: This symptom has been observed on Cisco and series routers. It may also occur on other models.
Symptoms: Changing the encapsulation on a member of a multilink bundle while the bundle is up may cause the router to reload. Conditions: This symptom has been observed when changing an interface that is an active member of a multilink bundle from PPP to frame relay encapsulation.
Conditions: The crash is seen when the length of any token in the URL of the request is excessively long. Symptoms: In the vrf-lite configuration , the superviser crashes when the vrfs are removed from the configuration. The crash persists even on interchanging the Wanda card and SIP OSPF was the common protocol and the crash has not been reported when bgp is configured on the router. Workaround: This is a repeatable bug and no workarounds are known at this point. This Issue happens only on serial interfaces when you change the MTU.
This has been experienced many times. The information gathered points to a software issue. This enclosure will be updated as more information is gathered. Successful exploitation of this vulnerability requires that an attacker be able to establish a DLSw connection to the device. Symptoms: The issue is observed at big service provider whereas atm-sub interfaces are deleted and new one created on regular basis as they remove and add new end customers.
Because it is not a manual process as scripting is used to perform that task, old configuration from deleted sub-interface are showing up on new sub-interfaces and in some cases are creating outages. Workaround: verify sub-interface configuration and if configuration cannot be deleted on that sub-interface, delete this sub-interface then create a dummy sub-interface which will pull that configuration. Then recreate prior sub-interface. This vulnerability affects all three methods of operation.
Symptoms: A router may reload unexpectedly when you enter the transmit-interface interface configuration command on an interface that has a point-to-point OSPF adjacency. Conditions: This symptom is observed on a Cisco router when the OSPF network type is configured as point-to-point, either because the interface is, for example, a serial interface, or because the ip ospf network point-to-point interface configuration command is enabled on the interface.
Workaround: When there is an OSPF adjacency on the interface that is being configured, first enter the shutdown interface configuration command before you enter the transmit-interface interface configuration command. Workaround: before assigning an interface to a VRF, make sure no protocol configuration exist under the interface by using either the "no" statement command or the command itself to get the configuration into a default state.
Symptoms: CBB route reflector advertising the route with different next hop, and IPFR route reflector lsanca92c still keeps the old route in the routing table. Soft clear needed to perform on lsanca92c to refresh the route. As a result, we supress the EBGP update incorrectly. The reason seems to be here that hello is sent before the port can actually forward IP packets.
Conditions: This symptom is observed only when you first enter the router isis command and then enter the bfd all-interfaces command. Possible Workaround: Enter the shutdown interface configuration command followed by the no shutdown interface configuration command on the affected interface.
The packet must be sent from a local network segment. Only devices that have been explicitly configured to process IPv6 traffic are affected. Upon successful exploitation, the device may reload or be open to further exploitation. Cisco has made free software available to address this vulnerability for all affected customers.
However, it could have existed before that. Workaround: None is required. This can lead to confusion or incorrect interpretation while troubleshooting problems. Conditions: This symptom has been observed on an Engine 3 Gigabit Ethernet line card of a Cisco series router. The symptom was not present on POS line cards of the same engine. Symptom has been observed between the time when reconvergence of all tunnels is triggered and the time when reconvergence of the particular tunnel is completed.
Symptoms: If a multilink interface has one end connected to Cisco router and the other end connected to a non-Cisco router, then the multilink interface receiver, at the non-Cisco router side, may drop all received packets due to packet fragment loss or out-of-order. Condition: This may happen immediately when the first member link comes back up again after all member links of the multilink interface have gone down.
Symptoms: When you make changes to an active QoS service policy, an already freed block may be accessed. If this situation occurs, a Malloc failure may occur, and the router may crash. Conditions: This symptom is observed on a Cisco router when you make changes to an active QoS service policy while traffic is being processed. Conditions: This can occur on all An output service policy is applied to the line card. This is seen only on one test bed and not seen on other test beds with the same configurations.
Workaround: The problem goes away by doing a shut command followed by a no shut command on the newly provisioned interface. Further Problem Description: Once the workaround is applied, this problem does not happen for that port even after the router or line card reloads. It also does not affect any traffic or any customers that are added later on. Symptoms: When passing full 10 Gig Traffic into an E5 LC wherein the Dual priority feature is enabled and all the 10 Gig traffic is matching the higher priority criteria, the LC crashes.
Conditions: 1. Dual priority feature enabled on the E5 LC. Also a label is configured for the Prefix A. All works fine in normal condition but when the Nexthop router crashes or when interface connecting Prefix B flaps, the router crashes.
These vulnerabilities include Denial of Service, improper verification of user credentials and the ability to read or write any file in the device's filesystem, including the device's saved configuration, which may include passwords or other sensitive information. Symptoms: The show policy-map interface command output counters are not incrementing if traffic stream is muticast and Eng3 is setting qos-group on ingress.
Conditions: - Ingress policy-map classifying, and setting qos-group for received muticast traffic streams on Eng3 of c node. Symptoms: Each multicast packet has 24 bytes overhead added on both eng3 with egress qos enabled and on eng5 LC. This overhead can be seen via "sh policy-map int" counter. This is not just a counter issue, it also impacts the throughput.
The problem observed when there is L2 local switching traffic between the POS ports. Symptoms: "show ip mds stats linecard" shows MDFS reloads on all LCs when multicast distributed routing is added on a VRF through the configuration of "ip multicast-routing vrf vpn distributed".
Further Problem Description: Note that whilst the MDFS reload is a real reload, it is without a preceding clear so it will not generally cause traffic interruption as it merely causes the same information to be downloaded to the linecards again. However in a highly scaled system running close to the limit, the additional load introduced by a full MDFS reload of every linecard may cause additional failures owing to maxing out of the CPUs.
Symptoms: VRF feature clean-up error messages occur When trying to delete T1 interfaces from a channel-group. Conditions: The condition occurs When trying to delete T1 interfaces from a channel-group. Workaround: Remove all the VRF configurations from the serial interface before trying to delete it. Problem only appear on rare situations. Adding back congiguration will restore service.
Symptoms: When the linecard runs into some abnormal situation, the communications between SPA and linecard may not be reliable. Conditions: feature mode is enabled and traffic is passed through it in ingress direction in PE router in a 6PE setup. On router's reload the following error messages were printed in router's log:. Output also fails to show policing or WRED information.
Conditions: Engine 3 channelized OC48 on c using frame-relay encapsulation on serial and POS interfaces, as well as subinterfaces configured on 4xGE card. Triggered by LC reset or RP toggle. Conditions: This symptom is observed when all of the following conditions are present:. Symptoms: remove interfaces from one vrfA to another vrfB and cause mdt tunnel to flap. Normally, any global relevant config should automatically exit the sub-config prompt, and accept the CLI as well.
The same PIM commands work fine when executed under the global config mode where they belong or under other sub-config modes. Symptoms: A Cisco router running Conditions: This appears to be impacting line cards with larger number of IDBs subinterfaces.
This happens only during SW bugs, but should be fixed to improve debuggablity. Conditions: problem can be seen on c12kprp-p-mz. Symptoms: The use of time-based WRED on an output service policy results in different min-max threshold values on E3 and on E5 for identical policy. Conditions: Service policy attached on MFR subinterfaces and microcode reload done. Conditions: C Engine 5 interface configuration change when system has dual RP.
EoMPLS traffic forwarding stops. Conditions: When error recovery is triggered and traffic passes into the Mod48 , during error recovery , it fails to drain the half packets and fails to initialise the congs. Condition: - configuring "service-policy output" on the interface, - flowing traffic heavy enough to be policed by the configuration. Conditions: The issue happens when we remove the "mpls ip" configuration under the tunnel and re-add it after a delay.
This corrupts and resets the feature processing flag in the ingress adjacency which normally enables "feature processing in the egress". Since this is reset to 0, the egress is not able to do QoS. The adjacency rewrite info corresponding to the tunnel in the egress gets removed. Workaround: Remove "mpls ip" from the tunnel interface once and immediately add it back. This corrects the issue. Condtions: This condition was seen again three days after the first occurence.
Traffic starts and stops forwarding after some time. If this occurs, APS may not switch to the other channel. Symptoms: BFD session goes down on removing and adding ip address from bfd enabled interface. Some CEF related commands on a previously removed sub interface are wrongly retained when configuring a new sub-interface. This is also true for sub-interfaces that are being reused. Symptoms: The following CEF related commands are retained from previously removed sub-intrefaces:.
Conditions: This issue is observed in Workaround: Verify sub-interface configuration and if configuration cannot be deleted on that sub-interface, delete this sub-interface then create a dummy sub-interface which will pull that configuration. Then recreate the prior sub-interface.
Following messages may be seen. Conditions: Dual RP set up. IOS upgrade done by reloading the secondary RP followed by redundacy force switch over. When the router is up, perform rommon upgrade on secondary RP. In case of non-redundant fabric configuration, the linecards may go into low bandwidth mode. This may result in configs being lost. Symptoms: When upgrading from S4c to S6p some tcam carve configuration commands are lost for an engine 3 card. Conditions: Just after upgrading one c from 28S4c to 32S6p, while doing the upgrade all all, the following tracebacks were observed in the log.
Workaround: This is a non-intrusive trace. There is no need for a workaround or operator intervention. Conditions: Only affects E5 It has only been seen on the 32s release S6o, Symptoms: When engine 3 4xGE linecard cpu is busy, packets may be forwarded to the wrong interface on the linecard when multiple configuration events are happening. Conditions: Multiple configuration events, for example removing multiple output service policies on an interface or subinterface level.
Ingress MQC policy re-marking set ip precedence multicast traffic. Traffic matching P re-marked IP Precedence. It is not recommended to use this command and it may lead SPA stuck in bad state. The test command shall be used under Cisco Support supervision. Symptoms: The interface level commands 'no ppp link reset' and 'no pp lcp fast-start' disappear from the configuration after performing a 'wr mem' or 'show run inc ppp'.
The commands do not reappear after reload. Conditions: Interface level configuration of 'no ppp lcp fast-start' and 'no ppp link reset'. Also, this symptom occurs if the snmp ifindex persist command is configured on the router. Usually the message is from the standby RP, so once that standby RP becomes active, the data from SNMP polls of these interfaces would not be accurate.
Symptoms: The data terminal ready DTR port adapter on a Cisco router does not continuously drop and pulse according to the time intervals configured with the pulse-time seconds interface configuration command. Conditions: This symptom is platform independent and is observed when you enter the show ip eigrp neighbors EXEC command immediately after you have entered the shutdown interface configuration command followed by the no shutdown interface configuration command for the interface that connects the router or switch to the neighbor.
Workaround: Wait for the neighbor list to be completely rebuilt before you enter the show ip eigrp neighbors EXEC command. This symptom is intermittent and may occur when authentication is turned off and subsequently turned back on again. Sometimes, this symptom occurs just after authentication is enabled. Conditions: This symptom has been observed when authentication is turned off and subsequently turned back on again and sometimes just after authentication is enabled. Workaround: This symptom is intermittent and may be resolved by disabling and reenabling authentication a second time.
This symptom may automatically be resolved after a few minutes. Conditions: This symptom is observed when manual summarization is enabled and subsequently disabled on a network that is also being redistributed into EIGRP. Symptoms: The interface-type and interface-number arguments in the distribute-list address family configuration command do not function.
Conditions: This symptom is observed on a Cisco platform that integrates the fix for caveat CSCea Cisco IOS software releases that are not listed in the "First Fixed-in Version" field at this location are not affected. Further Problem Description: The fix for CSCed re-enables the interface-type and interface-number arguments in the distribute-list address family configuration command for both VRF interfaces and non-VRF interfaces.
Symptoms: When BGP updates are received, stale paths are not removed from the BGP table, causing the number of paths for a prefix to increase. When the number of BGP paths reaches the upper limit of paths, the router resets. Conditions: This symptom is observed on a Cisco router when the neighbor soft-reconfiguration inbound command is enabled for each BGP peer.
Workaround: Remove the neighbor soft-reconfiguration inbound command. Symptoms: A Cisco series or another mid-range router may crash or may stop responding. The crash occurs when an interface that is configured with a rate-limit command is deleted by entering the no interface command and then reenabled by entering the interface command. Workaround: Remove the rate-limit configuration from the interface before deleting the interface.
Symptoms: A master timer may be accessed prior to being initialized. This can be seen by the following error message:. This router is booted with Cisco IOS version Symptoms: The crashinfo is returning the message "device or resource ready".
Conditions: If the LC gets reset before the crashinfo file is closed, the open bit is set. The actual BFD interval is constantly higher than the interval configured, in the traces below the tx interval is configured to 2s and the actual Tx interval is around 3,5s. Both multiplier are 3. Symptoms: On removal of a member from portchannel VRF interface, router crashes.
Conditions: This symptom has been observed on removal of a member from portchannel VRF interface. Conditions: No conditions have been identified so far. This section is being completed as more information is available. Further Problem Description: This is the complete log that is seen on the router:. Conditions: This symptom has been observed when all LCs are reset, after RP switchover on a long idle router. This is happening with PD also and here IPv6 ping fails. Conditions: 1 Crate a L2TPv3 tunnel..
Linecard is crashing because we are writting to hardware without stopping the pipeline. Symptoms: LC may crash at multicast code area after deprovision and reprovision mlp interface that has pim enabled. Symptoms: After deprovision and re-provision MLP interface and its associated serial link interfaces several times, error msg may appear.
After this error msg, you can no longer define the same mlp interface. Conditions: Recursive prefix going over attached parent and parent is load shared. That is, there is multiple path to reach parent prefix. And, there is no tag information for attached or connected parent prefix. Also, configure static route instead of static recursive route by specifying interface option in the static route configuration, if any exist.
LFIB does no t effectively support static recursive route configuration. Conditions: This symptom has been observed when provisioning xconnect statement under ATM interface. As part of solution Sanity checks and buffer corruption correction code added to avoid crashes.
More details in the attached log mail. Workaround: After each OIR of spa wait at least 2 minutes and then insert any new spa. Workaround: Admin shut down the interface, wait for 15 seconds and then 'no shudown' the interface to recover the BFD session. Symptoms: When sending 10 Gig traffic to a 2. Symptoms: On SIP, we are seeing the error message to be logged on the console as below.
Symptoms: After issuing "hw-module slot x reload", the pseudowire vc stays down since there is no local label allocated. Workaround: Removed and then add the xconnect command. Shutting down and restarting the interface does not work. Conditions: The crash will happen only if the input policymap is first disabled on the input interface 'no service-policy input X' and then it is de-configured on the router 'no policymap X'.
Symptoms: The packets might get punted to Tx slow-path. FRR switchover will not happen in 50ms time. Conditions: This symptom has been observed when primary link goes down and backup tunnel takes over. Conditions: This symptom has been observed on a Cisco node fully populated with E3 line cards, mvpn configuration, and large scale multicast routes and traffic.
Conditions: This symptom has been observed when the LC received the When generating 9. Symptoms: When a multilink bundle has one end connected to Cisco router and the other end connected to a non-Cisco router, the multilink interface receiver, at the non-Cisco router side, may drop all received packets due to packet fragment loss or out-of-order. Conditions: This may happen when the first member link of the multilink bundle comes up immediately after all member links of bundle have gone down.
Try this workaround first. Shut down all member links of the multilink bundle using the shutdown command. Wait for 1 minute. Bring up the member link interfaces one-by-one using the no shutdown command. If the above workaround option 1 does not resolve the symptom, perform the following steps:. Shut down all the links in the affected multilink bundle using the shutdown command.
Remove all the links from the bundle using the no multilink-group command until the bundle has no link. Perform the no shutdown command on all the links. To avoid this L2TPv3 codebase has to clean up explicitly. Conditions: Configure L2TPv3. Configure MLP. Then do a no shut on the MLP bundle. Symptoms: Customer has a SIP that crashes and leaves no crashinfo file.
Symptoms: BFD is not supported on Bundle interface. When user tries to configure BFD on link bundle, the router crashes. Conditions: This symptom has been observed when applying BFD configuration on Pos-channel and ether-channel. Symptoms: Packets from E5 to E2 get dropped on E2. On E2, the show contr events command shows the counters for "Tx short encap entry" increase. Symptoms: A Cisco router may generate export packets in which the first flow record contains incorrect data such as incorrect IP addresses.
Conditions: This symptom is observed only when an SNMPv3 user is configured with security level noAuthNoPriv or authPriv, when the same SNMPv3 user is assigned to the host through the snmp-server host command, and when this command includes the priv keyword. This is an improper configuration. For example, the symptom occurs when traps are triggered after the following software configurations has been applied:.
The symptom is not release-specific and may also affect other releases. Conditions: This symptom has been observed when SoO values are configured for a peer group. The peer group members may not correctly filter the prefixes that are based on the SoO value at the border. Workaround: BGP supports Dynamic Update peer groups, which ensure that packing is as efficient as possible for all neighbors regardless of whether or not they are peer-group members.
Peer groups simplify configurations, but peer-templates provide a much more flexible solution to simplify the configuration than peer groups. If the SoO configuration is applied directly to the neighbor or to a template, the symptom does not occur. Using templates to simplify the configuration is a better solution and Dynamic Update peer groups ensure efficiency. After the symptom has occurred, enter the clear ip route command for the affected VRF.
Symptoms: After giving the command traceroute ip x. Conditions: This symptom has been observed when the mpls ip option is configured in the network and for the core trunks. Workaround: The issue seems to be avoided if you instead enter the traceroute mpls ipv4 A. Symptoms: The OSPFv3 cost onPortChannel interfaces calculated based on the interface bandwidth may not be correct if the auto-cost reference-bandwidth command is used under the ipv6 ospf router mode..
Conditions: This symptom has been observed when the auto-cost reference-bandwidth command is used under the ipv6 ospf router mode. Workaround: Use the shutdown command followed by the no shudown command on the PortChannl interface. Symptoms: A Cisco router may reload when you enter the show standby or show standby brief command. Note, however, that a stress scenario in which many HSRP groups are configured and unconfigured while the show standby or show standby brief command is being entered may be a rather uncommon scenario.
Workaround: Do not to enter the show standby or show standby brief command while configuration changes are being made. Symptoms: When you enter the clear cef linecard command, IDBs may be hold on the line card. When you enter the clear cef linecard command, the number of IDBs that are used on the line card increases.
Further Problem Description: When many tunnel interfaces are used and when the clear cef linecard command is entered several times, the SWIDB number may reach its upper limit. If this situation occurs, you must reload the platform. Symptoms: All packets may be dropped across a T1 or E1 link on which class-based shaping is configured.
Conditions: If BFD minimum receive interval is configured below 50 ms, it can cause undesirable effects on the router. Also minimum receive interval below 50 ms is not supported in Cisco IOS. Symptoms: Dual RP GSR reached an unreachable state during maintenance window, while new interfaces were being commissioned. Workaround: The router was reloaded to recover from this state. RP switchover was also found to recover the router. Symptoms: When performing the show policy-map interface MFR command, the counters do not increment.
Even the class-default shows 0 packets. The counters in show frame-relay pvc show the packets correctly. This map-class consists of both an input and output service-policy. Symptoms: A FRR backup tunnel undergoes reoptimization, resulting in the teardown of the old lsp that is carrying traffic for primary lsps that have cutover to the backup tunnel.
However, the symptom is platform- and release-independent. Workaround: Reset the affected interface or reload the line card on which the affected interface is configured. Conditions: This symptom is observed on hardware-based E5 engine line cards on a Cisco IOS Release series that is configured for Local switching.
Symptoms: A router may crash when you enter the show policy-map interface command while an automated script completes the policy map and then removes the policy map during cleanup. Conditions: This symptom is observed on a Cisco router when you enter the show policy-map interface command while, at the same time, the automated script removes the policy map.
Symptoms: The line card of a Cisco series router reloads without creating a crashinfo file. Conditions: This symptom happens when all of the following conditions are met:. Workaround: Reconfigure explicit null mpls ldp explicit- null from all routers in the VRF. Symptoms: Interface counters are double counted for tag-tag switching. This is seen on Cisco series router. Conditions: This symptom has been observed when LSP paths change or when the core link flaps in the network.
Symptoms: When a VC is down, the output of the show connection command on the local side shows that the VC is up, even though the output of the show mpls l2 vc detail command shows that the VC is down. The output of the show connection command on the remote side shows that the VC is down. Symptoms: Engine 3 4 x 1 GigE line card stops receiving any traffic.
All other ports on the same LC were working fine. Further Problem description: This issue can be identified with following commands. Check for increments in the following counters GigabitEthernet 0 denotes port "0" in the LC. The RX queue pointers does not change while executing the below command repeatedly for few times. Conditions: This symptom has been observed with crompls configs with mpls- TE. Condition: This symptom has been observed when both TE-tunnel destinations are the same.
Traffic drop happens at first tunnel up after changing pseudowire-class. No problem at subsequent flap. The list of affected cards appears below. Conditions: This symptom has been observed when running field diagnostics against any of the following products, The testing may complete successfully or with errors, properly detecting faulty hardware and then the Field Diags ceases to complete writing eeprom results back to CSC or a ny fab card tested.
Conditions: This symptom has been observed when using an E5 interface as a CE facing interface. This is causing latency in traffic. Workaround: Remove the QoS configuration. If this is not an option, there is no workaround.
Workaround: Use the rate-limit command at the interface level in conjunction with an ACL to perform rate-limiting. Further Problem Description: The service-policy will show up in the configuration; however, it does not function. Conditions: This symptom has been observed when applying policy on control plane of 2 LC of same router. Conditions: This symptom has been observed when vbr-nrt SCR is changed. Only police function is not working. All traffic in other class queues would use new SCR rate automatically.
Conditions: This symptom has been observed when all line cards get reset, after RP switchover on a long idle router. The subinterface was pollable before removal and insertion of the card, but the ifIndex is missing afterward. Workaround: By reloading the router, or removing the subinterface and readding it, the ifIndex will be recreated.
This problem does not happen when VLAN is configured. Symptoms: A memory leak and memory exhaustion may occur when QoS policies are updated on 40, sessions. Conditions: This symptom is observed on a Cisco series but may also affect other platforms. Netflow is enabled on the main interface. Workaround: There is no workaround other than avoiding the above conditions.
A line card reload temporarily fixes the problem, but once the configuration is toggled again, the symptom resurfaces. Symptoms: Perform a line card reload on an Engine 0 CT3 or DS3 line card, upon recovery any frame-relay sub-interfaces on those line cards which have rate-limit output configured will no longer have this applied.
Conditions: This symptom has been observed when performing a line car d reload. Workaround: Reload of the router or a reload of the ingress line card resolves the issue. Conditions: MPLS pings and traceroutes are sent from tunnel headend to tail. The GE interfaces start flapping. OC48 interfaces also start flapping. With no negotiation auto command, GE interfaces stop flapping but OC48 keeps flapping. GE interfaces do not resume forwarding traffic.
Conditions: This symptom has been observed on Engine 3 gigabit ethernet line card of a Cisco series router. Problem was not present on POS line cards of the same Engine. Symptom is observed between the time when reconvergence of all tunnels is triggered and the time when reconvergence of the particular tunnel is completed. Conditions: This symptom has been observed while applying Hw-module ip load-sharing per-packet. Workaround: Disable the fair-queue command in the serial interfaces before adding them as member links to the MFR bundle.
Symptoms: For both 1xchocds1 and 4xchocds3, deleting the channel informations under Sonet controller, the definitions are removed on the primary RP but not the standby RP. E6 card continues to be crashed to IPC timeout which was caused by continuosly incremental CRC errors in FIA from output of the show controller fia command until the whole Cisco chassis is reload. They include the sizes 1 byte to 4 bytes small. Unexpected large packets also might cause similar issues.
Please note that these packets are errored or corrupted packets and are not intentionally generated by regular traffic. The traffic in the egress direction of this line-card is impacted and all packets are dropped on the Tx BMA. It is very difficult to execute any command on the line card due to slow response and the above continuous messages. Symptoms: Certain packet corruption which changes bufhdr length to 0 can result in a line card traffic disruption because of Alpha errors.
Conditions: This symptom has been observed with a Cisco router, Engine-3 line card, and multicast traffic. Symptoms: Egress packet rate is doubled due to fragmentation. This can be seen in the output of the show ip mroute vrf vrf-name active command.
Conditions: This symptom has been observed only in multicast VPN environment for bytes packets when the egress linecard is based on Layer 3 Forwarding Engine 3 or 5. Conditions: This symptom has been observed when the penultimate hop P router has 4 port OC48 E4 line card.
Move the egress fiber to another port on the ingress E4 line card and problem is gone. Symptoms: A router with a DPT uplink is stuck in reload loop. Every time the router reloads a crash occurs. SY1, If a Standby RP is present it will automatically assume Active role but it will also not see any other cards in the system.
User-initiated or automatic system reload attempts will fail, the system being unable to come back up. Conditions: This symptom has been observed in extremely rare occurrences, with no apparent reason. Workaround: No workaround can presently prevent the service interruption.
A manual power cycle of the chassis would restore normal operation. A jam condition on this bus would affect communication between all cards, effectively bringing the system down with at least the symptoms described above. The jam condition can happen only if a permanent or temporary failure occurs in the MBUS circuitry.
There is nothing the software can do if the failure is permanent, not even a chassis power cycle would correct the problem. Sequenced physical OIRs for all cards in the system would be the only way of identifying the bad one. But at least in some of the temporary failure cases there are chances of software-driven, automatic recovery, which would reduce or maybe even eliminate completely the service interruption.
This bug was raised to track the implementation of this particular recovery solution. If this happens on a Standby RP there is no affect on traffic. However if the RP switches over to become Active it will prevent traffic from flowing on the affected interfaces.
Conditions: This symptom has been observed when a platform has a bug such that OIR insertion notifications are synced to the Standby RP before the corresponding interface index values have been synced. The normal order is to always guarantee the index values arrive first. If the Standby RP shows this symptom, the workaround is to reload the Standby RP and check that after it comes up it has good interface index values, which should happen in most cases. Further Problem Description: This DDTS is to provide a platform-independent code workaround that allows the interface index values to self-recover after the correct if-index values are synced to the Standby RP.
The root-cause of the incorrect syncing order will still need to be fixed by the platform that has this symptom. But this DDTS will lower the severity by allowing it to self-recover in most cases on its own without user intervention. Conditions: This symptom has been observed when entering the clear counters command. Symptoms: When an attempt to move an interface from one multilink group to another fails due to platform-specific limitations, it leaves the interface in an invalid state.
The multilink-group command still appears in the interface configuration, but the interface does not appear in the output of show ppp multilink. Conditions: This symptom can occur on platforms that support distributed implementations of multilink such as the Cisco , Cisco , Cisco , or Cisco , and the platform does not allow the interface to be added to a multilink group for some reason e. Workaround: Use the no multilink-group command to remove the interface from its current multilink group before adding it to a new one.
Conditions: This symptom is observed after you have entered the microcode reload command. Conditions: This symptom is observed when Null0 interface is specified as the default output in local policy routing. Conditions: This symptom occurs when no authentication and encryption key has been configured.
Conditions: This symptom has been observed when the following two configuration commands are active at the same time:. This symptom causes a large memory leak each time the configuration is written. If neither configuration or only one configuration command is present, then there will not be a memory leak. Conditions: This symptom is platform- and release-independent and occurs when the router boots. However, proper system operation is not affected.
Symptoms: The counters for the show ip mroute vrf vrf-name count command and the show ip pim vrf vrf-name interface count command show huge counts in the decapsulation direction. Workaround: The clear ip pim vrf vrf- name count command would clear this condition for the respective counters. For the show ip mroute vrf vrf-name count command counters, either the route should be cleared or timed out for these counters to reset.
Symptoms: IP explicit path configuration change may not sync to the standby RP. Symptoms: Multicast states are created but Multicast routing instances are not found on the line card. Conditions: This symptom has been observed when the hosts join the multicast group. The condition results in all traffic over affected PVCs ceasing to pass.
Reload Cisco series router. Symptoms:The MFR bundle flaps after taking out all of the members and then adding them back. Conditions: This symptom has been observed when taking out all of the members and then adding them back.
Symptoms: A 2OC Engine6 line card always samples less ingress netflow from total input packets. Conditions: This symptom has been observed when applying a service policy on E4P Gigabit subinterface with Xconnect. Removing uRPF from the main interface does not clear the symptom. Workaround: uRPF should not be applied to a main interface that is supporting sub-interfaces, so avoiding this negative scenario will prevent this symptom.
Is there anyone who would be willing to feed my output through the cisco output interpreter and give me an idea on what happened? This will stop debuts, check for overheating, check for CPU usage, finally memory usage. Has anything change currently. Nothing had changed in our environment. Attaching the show tech log. Had to compress it as a. This topic has been locked by an administrator and is no longer open for commenting.
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If you have the output of a show stacks or show technical-support from enable mode command from your Cisco device, you can use Cisco CLI Analyzer to display potential issues and fixes. It is recommended that you read the section on Troubleshooting Bus Error Crashes on Processor Platforms before you proceed with this section.
The address reported by bus errors on RISC processors is therefore the virtual address as opposed to the physical address used by the processors. The output of the show region command must be used to check the address reported by the bus error. To illustrate this, let's take the following example:. Using the show region command output below, you can verify that 0xC is not a valid virtual address, and you can conclude that the bus error was caused by a software problem.
Use the Cisco CLI Analyzer registered customers only to decode the output of the show stacks or show technical-support from enable mode command and identify the Cisco IOS Software bug that is causing the bus error. Another advantage of using the show region command is that the memory mapping depends on the amount of memory installed on the router. This is confirmed with the show region command:. If you have a bus error at 0x65FFFFFF, the show region output takes the amount of memory into account and tells you that it's an illegal address software bug.
Use the show region command to verify whether the address indicated by the bus error is within the address ranges used by the router. If the address falls within a virtual address range, replace the hardware corresponding to this range.
If the address does not fall within a virtual address range, use the Cisco CLI Analyzer registered customers only to decode the output of the show stacks or the show technical-support from enable mode command and identify the Cisco IOS software bug that is causing the bus error. Give serious consideration to installing the most recent maintenance release of the Cisco IOS Software train that you are currently running.
A special type of bus error crash is when the crash is caused by a corrupted program counter PC. The PC value is the location of the instruction which the processor was executing when the bus error occured. When a bus error caused by a corrupted PC occurs, the following message appears on the console:. In this case, the PC has jumped to the address 0x0 probably because of a null pointer , but this is not where the instruction is located.
This is a software problem so there is no need to check with the show region command. Another type of bus error crash that occurs from time to time is when the PC value is equal to the address value. For instance:. Notice the k1 register value is 0x14 hexadecimal which is equal to 20 in decimal. This points to a Cache Parity Exception. In this particular case, the parity error is not handled properly and is being masked by a bus error.
The router has crashed due to a software bus error in the function handling a Cache Parity Exception. You should consider this crash as a regular processor memory parity error crash and follow the recommendations given in Processor Memory Parity Errors PMPEs. Verify that all network cards are supported by the Cisco IOS software. The Software Advisor registered customers only gives you the minimum versions of Cisco IOS software needed for hardware.
Verify, also, that the bootflash image supports the hardware installed if you have a router that supports a boot image such as the Cisco or Cisco series router. If a software configuration change has recently been made, and the router is in a booting loop, a software bug may be causing this issue.
If the router is not able to boot up, you can bypass the configuration to identify whether that is causing the issue. Follow these steps:. From ROM Monitor, use the confreg command to change the configuration register to a setting, such as 0x, to ignore the router's configuration:. If the router boots without any errors, there is a configuration issue causing the problem. Verify that your configuration is supported in the Cisco IOS software and by the hardware.
If it is supported, use the Bug Toolkit registered customers only to identify any software bugs that you may be experiencing. Give serious consideration to installing the most recent maintenance release of the Cisco IOS software train that you are currently running.
If you are experiencing a bus error exception booting loop, it may be caused by mis-seated hardware. For higher-end platforms such as the or routers, reseat the processor, VIP, port adapters, or line card that is reloading due to a bus error exception. The information contained in the bus error does not help to isolate the hardware.
Therefore, it is important to remove and reinsert cards to find the problem hardware. Here are some recommended steps to isolate the problem:. It is recommended that you monitor the router for 24 hours to be sure that the router continues to function without experiencing the issue again. Note: Do not manually reload or power-cycle the router before collecting the above information unless required to troubleshoot a bus error exception as this can cause important information to be lost that is needed for determining the root cause of the problem.
Contents Introduction. Introduction This document explains how to identify bus error crashes and how to troubleshoot those crashes depending on the type of processor you have in your Cisco router. Prerequisites Requirements Cisco recommends that you read Troubleshooting Router Crashes before proceeding with this document. Conventions Refer to the Cisco Technical Tips Conventions for more information on document conventions. Identifying Bus Error Crashes The system encounters a bus error when the processor tries to access a memory location that either does not exist a software error or does not respond properly a hardware problem.
You must collect the show tech-support before you do a reload or power-cycle because these actions can cause a loss of information about the problem. Note: The show tech-support command does not include the show platform or show logging commands. Boot Sequence Information — The complete bootup sequence if the router experiences boot errors.
When a process crashes, you can find a core dump file under the location shown in Table 4. A core dump is a full copy of the memory image of the process. It is recommended that you save the core dump files until troubleshooting is done. This is because a core dump includes much more information about a crash problem than a crashinfo file, and it is needed for deep investigation.
In order to identify an IOSD crash, find the exception output below on the console. You can identify the SPA driver crash if you find that the process mcpcc-lc-ms is held down. Table 6 lists their main processes. If a crash occurs, the module reloads. Cisco designed the Cisco Quantum Flow Processor as both hardware and software architecture.
The first generation resides on two pieces of silicon; later generations can be single-chip solutions that adhere to the same software architecture described here. The term "Cisco QuantumFlow Processor" alone refers to the overall hardware and software architecture of the network processor.
In order to identify the QFP ucode crash, find this output on the console or the core dump file of cpp-mcplo-ucode:. When a Linux kernel crashes, the module reloads without the crash output. After it boots up again, you can identify the Linux kernel crash if you find the core dump file of the Linux kernel.
The size of kernel core file can be more than MByte.
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