NX-OS 6.1.4/Fan Zone Speed

[Dino Panagiotopoulos]

Hi Everyone,

Since upgrading to NX-OS 6.1(4), fan module speed changes are written to the startup config which in turn is creating a diff for each time the fan speed changes. As you could imagine, this is causing a lot of false positive emails to be sent each time Rancid and CVS run. Please see the example below:

retrieving revision 1.1356
diff -U 4 -r1.1356 10.111.100.151
@@ -77,9 +77,9 @@
  !Env: Fan4(fab_fan2)  N7K-C7010-FAN-F      1.1        Ok
  !Env: Fan_in_PS1      --                   --         Ok
  !Env: Fan_in_PS2      --                   --         Ok
  !Env: Fan_in_PS3      --                   --         Ok
- !Env: Fan Zone Speed: Zone 1: 0x70 Zone 2: 0x50
+ !Env: Fan Zone Speed: Zone 1: 0x60 Zone 2: 0x48
  !Env: Fan Air Filter : Present

This will flip back and forth with each fan change. Has anyone on 6.X NX-OS code experienced anything like this? We are on RANCID 2.3.4 and if this not resolved in the newest release, is it possible to just remove 'sh env' from the nxrancid.in file? 

Thanks,
Dino Panagiotopoulos

[Dino Panagiotopoulos]

Thank you to Mark & Doug for their suggestions which resolved my issue. The solution is to add the following line to the nxrancid file under "sh environment" subroutine:

next if (/^Fan Zone Speed:/);

The final config for the subroutine should look like this:

# This routine parses "show environment"

sub ShowEnv {

    print STDERR "    In ShowEnv: $_" if ($debug);

 

    while (<INPUT>) {

        tr/\015//d;

        last if (/^$prompt/);

        next if (/^(\s*|\s*$cmd\s*)$/);

        next if (/^\s*\^\s*$/);

        next if (/^Fan Zone Speed:/);

        return(1) if /Line has invalid autocommand /;

        return(1) if /(Invalid input detected|Type help or )/;

        return(1) if (/\% Invalid command at /);

        return(-1) if (/\% Permission denied/);

        return(-1) if (/command authorization failed/i);

 

        s/ +$//;        # Drop trailing ' '

        ProcessHistory("COMMENTS","","","!Env: $_");

    }

    ProcessHistory("COMMENTS","","","!\n");

    return(0);