09-29-2020 09:06 AM
I'm having a bad week - my ISR 4331 router has been flooding my syslog server with these messages non-stop and I can't seem to find why:
Sep 29 15:38:54.415: %IOSXE-3-PLATFORM: R0/0: bcm_switch: unit 0 SER_ERROR_0 REG unexpected NACK failure! Sep 29 15:38:54.415: %IOSXE-3-PLATFORM: R0/0: bcm_switch: SER Parity Check Error. Sep 29 15:38:54.415: %IOSXE-3-PLATFORM: R0/0: bcm_switch: SchanTimeOut:soc_schan_op operation timed out Sep 29 15:38:54.416: %IOSXE-3-PLATFORM: R0/0: bcm_switch: unit 0 SER_ERROR_0 REG SCHAN NACK analysis. Sep 29 15:38:54.416: %IOSXE-3-PLATFORM: R0/0: bcm_switch: unit 0 SER_ERROR_0 REG unexpected NACK failure! Sep 29 15:38:54.416: %IOSXE-3-PLATFORM: R0/0: bcm_switch: SER Parity Check Error. Sep 29 15:38:54.417: %IOSXE-3-PLATFORM: R0/0: bcm_switch: SchanTimeOut:soc_schan_op operation timed out Sep 29 15:38:54.418: %IOSXE-3-PLATFORM: R0/0: bcm_switch: unit 0 SER_ERROR_0 REG SCHAN NACK analysis. Sep 29 15:38:54.418: %IOSXE-3-PLATFORM: R0/0: bcm_switch: unit 0 SER_ERROR_0 REG unexpected NACK failure! Sep 29 15:38:54.418: %IOSXE-3-PLATFORM: R0/0: bcm_switch: SER Parity Check Error. Sep 29 15:38:54.418: %IOSXE-3-PLATFORM: R0/0: bcm_switch: SchanTimeOut:soc_schan_op operation timed out Sep 29 15:38:54.420: %IOSXE-3-PLATFORM: R0/0: bcm_switch: unit 0 SER_ERROR_0 REG SCHAN NACK analysis. Sep 29 15:38:54.420: %IOSXE-3-PLATFORM: R0/0: bcm_switch: unit 0 SER_ERROR_0 REG unexpected NACK failure! Sep 29 15:38:54.420: %IOSXE-3-PLATFORM: R0/0: bcm_switch: SER Parity Check Error. Sep 29 15:38:54.420: %IOSXE-3-PLATFORM: R0/0: bcm_switch: SchanTimeOut:soc_schan_op operation timed out Sep 29 15:38:54.421: %IOSXE-3-PLATFORM: R0/0: bcm_switch: unit 0 SER_ERROR_0 REG SCHAN NACK analysis. Sep 29 15:38:54.421: %IOSXE-3-PLATFORM: R0/0: bcm_switch: unit 0 SER_ERROR_0 REG unexpected NACK failure! Sep 29 15:38:54.422: %IOSXE-3-PLATFORM: R0/0: bcm_switch: SER Parity Check Error.
The IOS version:
Cisco IOS XE Software, Version 16.09.04
Cisco IOS Software [Fuji], ISR Software (X86_64_LINUX_IOSD-UNIVERSALK9-M), Version 16.9.4, RELEASE SOFTWARE (fc2)
I've found this Parity Errors Troubleshooting Guide but I'm not seeing my exact error, I'm a little way about messing around in an area I'm unsure of. Hoping someone can point me in the right direction.
Solved! Go to Solution.
09-29-2020 09:27 AM
- Looks like a hardware error , single parity errors usually don't affect operation. If the device is currently mission critical no further action may be taken/needed. Otherwise you might contemplate cold-reboot (with power cycle) , check if problem remains in place or not.
M.
09-29-2020 09:27 AM
- Looks like a hardware error , single parity errors usually don't affect operation. If the device is currently mission critical no further action may be taken/needed. Otherwise you might contemplate cold-reboot (with power cycle) , check if problem remains in place or not.
M.
09-29-2020 10:27 AM
Thanks, I'll try to reboot overnight and see.
10-01-2020 09:33 AM
You were right, after the reboot I've seen no further errors. Thank you very much.
06-28-2021 01:14 AM
Just to add to this (as we've just seen the problem and a reboot cleared it)- this seems to be addressed by https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvv98528 which is fixed in later IOS-XE releases.
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