ISDN Log messages

Answered Question
Aug 19th, 2009
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We are running IOS 12.4(22)T on 3845 voice gateways. It is mgcp gateway with T1 / PRI configuration as follow:


controller T1 0/0/0

cablelength short 110

pri-group timeslots 1-24


interface Serial0/0/0:23

no ip address

encapsulation hdlc

no snmp trap link-status

isdn switch-type primary-ni

isdn incoming-voice voice

no cdp enable


the problem is the logs are being filled up by these messages. The logging level is debug.


Aug 19 19:38:28.032: %ISDN-6-CONNECT: Interface Serial0/3/0:23 is now connected to 5142405751 N/A

Aug 19 19:38:46.880: %ISDN-6-DISCONNECT: Interface Serial0/3/1:2 disconnected from 4506250708 , call lasted 95 seconds


what command can i use to stop these messages and still be able to get ISDN Layer2DOWN and Layer2UP messages. We DON'T want to change the logging level to warning.



Correct Answer by Sergio Fernando... about 4 years 6 months ago

It's a little bit late for the original question, but in case someone else stops by and this works for them, use the logging discriminator commands:


logging discriminator NOISDN severity drops 6 facility drops ISDN msg-body drops connected

logging buffered discriminator NOISDN

logging console discriminator NOISDN

logging monitor discriminator NOISDN


I found it originally on this online blog:

http://internetworking.hu/2011/05/filtering-isdn-interface-connects/

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paolo bevilacqua Wed, 08/19/2009 - 12:13
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There is no way, so either change logging level, or filter these out in the logging server.

agup Wed, 08/19/2009 - 12:17
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how about if i enter the 'no logging event link-status' command on the serial interface will it also stop the other Layer 2 Down/Up events from being logged.

paolo bevilacqua Wed, 08/19/2009 - 14:04
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It will not.

agup Fri, 08/21/2009 - 08:44
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another question, we have several other gateways for many customers that we manage though running a different 12.4 IOS version, we don't get the logs filled up with ISDN messages on those one. Why is it being caused on this one? The logging level is debug on all and i don't see any special command which is stopping those messages from being logged.

paolo bevilacqua Fri, 08/21/2009 - 13:25
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May be they don't do that many calls.

agup Sat, 08/22/2009 - 03:37
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some of them are equally busy systems.

santoshdpawar Tue, 05/04/2010 - 22:17
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Hi,


What if I enable logging buffered 4096 informational ? All of my WAN link ( serial interface) alarms wont go to syslog ?


Regards,

Santosh

Correct Answer
Sergio Fernando... Fri, 01/04/2013 - 14:38
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It's a little bit late for the original question, but in case someone else stops by and this works for them, use the logging discriminator commands:


logging discriminator NOISDN severity drops 6 facility drops ISDN msg-body drops connected

logging buffered discriminator NOISDN

logging console discriminator NOISDN

logging monitor discriminator NOISDN


I found it originally on this online blog:

http://internetworking.hu/2011/05/filtering-isdn-interface-connects/

rotem.shein Sat, 01/12/2013 - 01:28
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You are correct the command no event link status on the PRI int would stop that log



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Chester Rieman Mon, 07/13/2015 - 10:48
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Use this command on the serial interface for the PRI to ignore the connect/disconnect messages

 

interface serial 1/0:23

no logging event link-status

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