Logging Issue

[aneesh.ts]

Am always receiving up logs in one of my LAN interfaces. There are n

o interface downlods.

Wondering what could be the issue. Could there be a real link flap issue.

Why could the same link always come up without going down.

001391: Jun  4 09:51:58.850 INDIA: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
001392: Jun  4 12:01:19.930 INDIA: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
001393: Jun  4 12:01:25.438 INDIA: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up
001394: Jun  4 12:02:43.599 INDIA: %LINK-3-UPDOWN: Interface FastEthernet0/0, changed state to up

Any suggestions?

Thanks in advance.

Regards,

AneesH

[Joe Clarke]

What version of code is running on this device?

[aneesh.ts]

IOS & hardware details..

Cisco IOS Software, 1841 Software (C1841-IPBASE-M), Version 12.4(15)T9, RELEASE SOFTWARE (fc5)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2009 by Cisco Systems, Inc.
Compiled Tue 28-Apr-09 11:11 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)

NS-CHN-DLN-R01-P uptime is 16 weeks, 6 days, 4 hours, 20 minutes
System returned to ROM by power-on
System restarted at 09:57:22 TOKYO Tue Feb 9 2010
System image file is "flash:c1841-ipbase-mz.124-15.T9.bin"

Cisco 1841 (revision 7.0) with 115712K/15360K bytes of memory.
Processor board ID FHK1327736Z
2 FastEthernet interfaces
1 Serial(sync/async) interface
DRAM configuration is 64 bits wide with parity disabled.
191K bytes of NVRAM.
31360K bytes of ATA CompactFlash (Read/Write)

Configuration register is 0x2102

AneesH

[Joe Clarke · Accepted solution]

This could be CSCsv90092.  Is CEF disabled?  If so, enabling on this interface will work around the problem.  The bug is fixed in 12.4(15)T10.

[aneesh.ts]

Hi joe,

Thank you so much mate.

You were absolutely right. We've seen a lot of throttles as mentioned in the Bug description.

Unfortunately CEF is already enabled on the router. However I again enabled it on the interface.

Not sure whether it will help.

Lemme monitor the device for a while now. Since its not impacting, nothing much to worry.

You were so helpful and I totally appreciate your effort with this.

AneesH