CSCvp59825 - i2c i2c-6 SCL is stuck low, exit recovery messages are seen on Hornet with Guardian upl...

Network20 · ‎06-08-2021

We had a trunked uplink port G1/1/2 admin shut. After reloading we got this error message. Running Cisco C9200L-48P-4G running 17.3.3. This was in a stack of 4 9200s. Had to disconnect all cables and stack cables, switch booted up like normal. So 17.3.3 did not fix this issue.

00ura7akl149H5rsX5d6 · ‎07-05-2021

Hi,

I also have this issue. Did you ever find the root cause or a workaround? I'm about to raise a TAC but wanted to know more information before I do.

Regards

yskaf · ‎12-04-2022

any updates ???

Minnesotakid · ‎12-10-2021

I've got a C9200L-24P-4G on 17.3.3 with the same error.

superman.do · ‎09-25-2022

I used two 9200L-48T-4X-E as stack, and also found "i2c i2c-3: SCL is stuck low, exit recovery" messages.

When disconnecting the stack and restarting the stack, the second switch kept restarting，Enter rommon mode after restarting several times

yskaf · ‎12-04-2022

i have the same error i am on version 17.6.3...

as per this link https://bst.cisco.com/bugsearch/bug/CSCvp59825 i am not affected with the bug as only affected release is 16.12.1

any updates ???

a.middlehurst · ‎09-27-2023

Hi,

Any update on this? I've got a stack of two C9200L-24P-4G-E's (running 17.06.04.0.4912) where unit 1 failed and went into a reboot loop. I had to disconnect the cable from stack port 1/1 (to 2/2) to be able to boot the switch ok.. I repatched the connections from unit 1 to unit 2 (its used as a DMZ switch for server connections).

However last night I reconnected the stack cable again but I got repeated logs. Am I looking at H/W replacement?

*Sep 26 17:21:58.032 BST: %IOSXE-3-PLATFORM: Switch 1 R0/0: kernel: i2c i2c-3: SCL is stuck low, exit recovery

I also had:

*** Stack cable authentication failed for cable inserted on stack port 1 on switch 1 ***

Reloading chassis because cable auth failed on stack_port 1Sep 26 17:23:57.890: %PMAN-3-PROCHOLDDO WN: R0/0: sif_mgr: The process sif_mgr has been helddown (rc 143)
Sep 26 17:24:08.062: %PMAN-0 -PROCFAILCRIT: R0/0: pvp: A critical process sif_mgr has failed (rc 143)
Sep 26 17:24:08.327: %PMAN-3-RELOAD_RP: R0/0: pvp: Reloading: Switch will be reloaded

Chassis 1 reloading, reason - stack cable authentication failed
Sep 26 17:24:09.119: %PMAN-5-E XITACTION: C0/0: pvp: Process manager is exiting: reload cc action requested
Sep 26 17:24:09.208: %PMAN-5-EXITACTION: F0/0: pvp: Process manager is exiting: reload fp act ion requested
Sep 26 17:24:11.359: %PMAN-5-EXITACTION: R0Sep 26 17:24:22.541: %PMAN-3-PROCESS_NOTIFICATION: R0/0: pvp: System report /crashinfo/KC1-1ST-DMZ-SW01_1_RP_0-system-report_1_20230926-172411- BST.tar.gz (size: 8345 KB) generated

Initializing Hardware...

System Bootstrap, Version 17.9.1r [FC8], RELEASE SOFTWARE (P)
Compiled Sat 07/23/2022 16:22:46 by rel

Current ROMMON image : Primary
C9200L-24P-4G platform with 2097152 Kbytes of main memory

boot: attempting to boot from [flash:packages.conf]
boot: reading file packages.conf

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Waiting for 120 seconds for oth