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How to filter specific syslog event on cisco router

Posted on 2013-01-18
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Last Modified: 2013-01-18
Hi all,

I have an issue with a cisco 877 router that has a bug where every time it receives a dns request that needs to do dns forwarding it produces the following syslog message:
%FIB-4-FIBCBLK: Missing cef table for tableid 65535 during CEF samecable event

is there any way to filter just that message from overflowing my syslog server?

I have experimented with logging discriminator but wasn't able to figure out exactly how to do it.

This is what I've tried
#logging discriminator BUG mnemonics drops FIBCBLK

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however when I do show logging I see this:

...
No Active Message Discriminator.

Inactive Message Discriminator:
BUG       mnemonics      drops    FIBCBLK
..

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Question by:128bits
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itguy565 earned 500 total points
ID: 38795133
Here is a site that shows you just how to do that :

https://supportforums.cisco.com/thread/2100410
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Expert Comment

by:itguy565
ID: 38795152
Maybe this will help :

Logging Descriminator
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LVL 11

Expert Comment

by:itguy565
ID: 38795173
Try this :

logging discriminator nolog mnemonics drops FIBCBLK
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Author Comment

by:128bits
ID: 38795277
Thanks for the replies itguy565!

From the forum link that you sent me it seems that my discriminator line was okay, all I had to do was enable it on the logging syslog!

logging host <IP> discriminator BUG

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after that the discriminator shows up as active in the show logging

thank you for the help!
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