From: Shine Joseph (shinepjoseph@iprimus.com.au)
Date: Thu Mar 13 2008 - 03:49:36 ARST
Emil,
Yes. This command is very poorly documented (or no documentation). The only
place I could see some reference to this was in the 12.3 documentation.
It reads "The default for this command is 10 messages logged per second and
exclusion of messages of the errors level or lower."
The last part of it gives the idea about excluded messages. This statement
is actually removed from 12.4 doc.
http://www.cisco.com/univercd/cc/td/doc/product/software/ios123/123tcr/123tf
r/cfrgt_04.htm#wp1211865
To make doubly sure, test it with a syslog server.
HTH,
Shine
_____
From: YourPal [mailto:dearprudence28@gmail.com]
Sent: Thursday, 13 March 2008 4:41 PM
To: Shine Joseph
Cc: Cisco certification
Subject: Re: Question on "logging rate-limit" command
Hi Shine,
I see your point. I suppose you were doing "logging console". In my case,
I'm sending debug messages to a syslog server. Does the "logging rate-limit
all" command still apply?
I tested the "logging rate-limit all" command using "logging buffered
debugging". It is effective. I guess it applies to debug message logging to
syslog as well.
Thank you.
BR,
Emil
On 3/12/08, Shine Joseph <shinepjoseph@iprimus.com.au> wrote:
Emil,
When the command logging rate-limit is used, it doesn't include the
debugging logs in the rate-limiting process. But the command logging
rate-limit all includes the rate-limiting of debug logs as well.
Please see below the outputs: To test this I have turned on the just ip icmp
debugging. See the difference in debug outputs with the two commands.
Initially, the rate-limit 1 is turned on. For testing the second command
rate-limit all 1 is used.
R1(config)#do debug ip icmp
ICMP packet debugging is on
R1(config)#logging rate-limit 1
R1(config)#do ping 172.16.12.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.12.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/4/4 ms
R1(config)#
*Sep 28 05:50:39.523: ICMP: echo reply sent, src 172.16.12.1, dst
172.16.12.1
*Sep 28 05:50:39.523: ICMP: echo reply rcvd, src 172.16.12.1, dst
172.16.12.1
*Sep 28 05:50:39.527: ICMP: echo reply sent, src 172.16.12.1, dst
172.16.12.1
*Sep 28 05:50:39.531: ICMP: echo reply rcvd, src 172.16.12.1, dst
172.16.12.1
*Sep 28 05:50:39.531: ICMP: echo reply sent, src 172.16.12.1, dst
172.16.12.1
*Sep 28 05:50:39.535: ICMP: echo reply rcvd, src 172.16.12.1, dst
172.16.12.1
*Sep 28 05:50:39.535: ICMP: echo reply sent, src 172.16.12.1, dst
172.16.12.1
*Sep 28 05:50:39.539: ICMP: echo reply rcvd, src 172.16.12.1, dst
172.16.12.1
*Sep 28 05:50:39.539: ICMP: echo reply sent, src 172.16.12.1, dst
172.16.12.1
*Sep 28 05:50:39.543: ICMP: echo reply rcvd, src 172.16.12.1, dst
172.16.12.1
R1(config)#
R1(config)#logging rate-limit all 1
R1(config)#do ping 172.16.12.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 172.16.12.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms
R1(config)#
*Sep 28 05:50:58.347: ICMP: echo reply sent, src 172.16.12.1, dst
172.16.12.1
HTH,
Shine
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
YourPal
Sent: Wednesday, 12 March 2008 10:28 PM
To: Cisco certification
Subject: Question on "logging rate-limit" command
Hi Group,
Excuse me for posting this such a trivial question. It's bothering me and I
wish to seek clarification.
A router has the following config:
!
service timestamps debug datetime msec localtime show-timezone
logging trap debugging
logging 173.1.8.100
!
The task asks to configure the router to limit the number of syslog messages
to 10 per second.
Which one of the following commands answers the task accurately?
logging rate-limit 10
logging rate-limit all 10
I don't quite understand their difference. Please shed some light.
Thank you.
BR,
Emil
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