[c-nsp] Spanning-Tree Loop (12.2.18SXF7)

[Antonio Soares]

Interesting, the switch did not crash but a debugfile was generated. And
something I can read from that file:

++++++++++++++++++++++++++++++++++++++++
Processor Memory: total 388120864, free 276632816, used 111488048
IO Memory: total 67108864, free 22640, used 67086224
(..)
CPU utilization for five seconds: 100%/28%; one minute: 99%; five minutes:
99%
++++++++++++++++++++++++++++++++++++++++

Memory leak ? It's the first time I see an equipment recovering from a
situation like this without human intervention. It would be nice if the
impact was not an STP loop...



Regards,

Antonio Soares, CCIE #18473 (R&S/SP)
amsoares at netcabo.pt


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Antonio Soares
Sent: sexta-feira, 5 de Novembro de 2010 17:15
To: 'Jared Mauch'
Cc: 'cisco-nsp'
Subject: Re: [c-nsp] Spanning-Tree Loop (12.2.18SXF7)

The 6500's uptime is 1 year and 16 weeks. The funny thing is that the 6500
recovered by itself, no reload or sup switchover occurred. And I don't see
anything wrong with the memory stats. Really strange. Sometimes we prefer a
crash :) This STP loop was active a few hours...

I can't upgrade without knowing what is the bug. I will keep searching.

Thanks.

Regards,

Antonio Soares, CCIE #18473 (R&S/SP)
amsoares at netcabo.pt


-----Original Message-----
From: Jared Mauch [mailto:jared at puck.nether.net] 
Sent: sexta-feira, 5 de Novembro de 2010 17:00
To: Antonio Soares
Cc: 'cisco-nsp'
Subject: Re: [c-nsp] Spanning-Tree Loop (12.2.18SXF7)

There could have been any sort of a memory leak since SXF7 and now that
caused you to see this.  How long was your device up?  I hate to say this,
but I would go to recent software (eg: SXF15a/SXF16).

- Jared

On Nov 5, 2010, at 12:25 PM, Antonio Soares wrote:

> Hello group,
> 
> I'm troubleshooting a STP loop that seemed to be triggered by these
errors:
> 
> ++++++++++++++++++++++++++++++++
> %PM_SCP-SP-3-LCP_FW_ABLC: Late collision message from module 1, port:029
> %IPC-SP-5-WATERMARK: 15612 messages pending in xmt for the port
> CHKPT:STANDBY SP(2080000.B) seat 2080000
> %IPC-SP-5-WATERMARK: 20068 messages pending in xmt for the port
> CHKPT:STANDBY SP(2080000.B) seat 2080000
> %IPC-SP-5-WATERMARK: 22904 messages pending in xmt for the port
> CHKPT:STANDBY SP(2080000.B) seat 2080000
> %PM_SCP-SP-3-LCP_FW_ABLC: Late collision message from module 2, port:039
> %IPC-SP-5-WATERMARK: 25710 messages pending in xmt for the port
> CHKPT:STANDBY SP(2080000.B) seat 2080000
> %IPC-SP-5-WATERMARK: 28510 messages pending in xmt for the port
> CHKPT:STANDBY SP(2080000.B) seat 2080000
> %PM_SCP-SP-3-LCP_FW_ABLC: Late collision message from module 2, port:039
> %IPC-SP-5-WATERMARK: 30344 messages pending in xmt for the port
> CHKPT:STANDBY SP(2080000.B) seat 2080000
> 
> %SYS-SP-2-MALLOCFAIL: Memory allocation of 1768 bytes failed from
> 0x4020DCC8, alignment 32 
> Pool: I/O  Free: 148112  Cause: Memory fragmentation 
> Alternate Pool: None  Free: 0  Cause: No Alternate pool 
> 
> -Process= "Spanning Tree", ipl= 2, pid= 126
> -Traceback= 40280990 402826F8 4020DCD0 4020E064 402108DC 4020D0B8 40AAB1BC
> 40AAB64C 404A3970 404C4F64 404C51A8 404C5460 404AAA58 404AAE40 40A9EE00
> 40A9D71C
> ++++++++++++++++++++++++++++++++
> 
> These were seen on one of core's 6500. The 6500s are running 12.2.18SXF7.
> 
> Fortunately the problem went away by itself. The last thing we want is a
STP
> loop in a network with several 6500s and 4500s, right ? :)
> 
> Anyone has seen something like this ? I'm now hitting Bug Toolkit to see
if
> this was reported before.
> 
> 
> Thanks.
> 
> Regards,
> 
> Antonio Soares, CCIE #18473 (R&S/SP)
> amsoares at netcabo.pt
> 
> 
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