[rancid] Excluding config lines in Rancid

[Hughes, Doug]

Sure, this topic is something of an FAQ.


*         Edit the rancid executable (or whatever executable you happen to be using to collect the data)

*         Most of the stuff for normal commands will be in the 'WriteTerm' callback (see CommandTable)

*         There should already be an ntp clock-period match in there somewhere. In mine, it looks like this:

        # Dog gone Cool matches to process the rest of the config

        /^tftp-server flash /   && next; # kill any tftp remains

        /^ntp clock-period /    && next; # kill ntp clock-period

        /^ length /             && next; # kill length on serial lines

        /^ width /              && next; # kill width on serial lines

*         Next find the ShowEnv subroutine

o   Look for 'next if' in the while (<INPUT>) loop. Add a line above or below that says: next if (/INTAKE/)

*         Similarly for ShowFlash subroutine, add a next if (/bootflash/) if you don't want to see bootflash.



'next if' is the generic answer about how to eliminate things. Look in @commandtable to find the command that gets executed, that maps to a callback. Go to the callback and add a 'next if'.

From: rancid-discuss-bounces at shrubbery.net [mailto:rancid-discuss-bounces at shrubbery.net] On Behalf Of Vincent Aniello
Sent: Wednesday, April 23, 2014 10:50 AM
To: rancid-discuss at shrubbery.net
Subject: [rancid] Excluding config lines in Rancid

Rancid is detecting configuration changes on a few configuration items in Cisco switch configurations that are automatically updated and Rancid should exclude from it's comparisons.

On a Cisco Catalyst 3560 switch running software version 12.2(25)SEE4 Rancid is reporting changes to the "ntp clock-period" command:

- ntp clock-period 36029104
+ ntp clock-period 3602910

On a Cisco Nexus 3548 switch running software version 6.0(2)A1(1e) Rancid is reporting changes to the following configuration items:

  !Env:  INTAKE     45            29
+ !Env:  INTAKE     45            28

- !Flash: bootflash:     5356844    Apr 22 17:42:48 2014  BufferMonitor-1HourData
+ !Flash: bootflash:     5356844    Apr 22 20:42:48 2014  BufferMonitor-1HourData

Can Rancid be configured to ignore changes in these lines?

I am currently running Rancid 3.0, but had the same issue in 2.3.6 and 2.3.8.

Thanks.

--Vincent
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