[rancid] ASR1006 - IOS XE 3.1S, CRS-1 - IOS XR 3.9.1

Mark Tinka mtinka at globaltransit.net
Thu Oct 14 14:15:49 UTC 2010

Hello all.

IOS XE 3.1S (and maybe later) has a bug on the ASR1006 
platform where an empty file called 'foo.bar' (no, really), 
gets created on the hard drive file system.

Deleting this file does not help, and the router recreates 

The file is regularly modified, so RANCID is always catching 
changes each time it runs. Bug ID CSCth48537 has been opened 
for this, but no news on when a fix will be available.

On the CRS-1, a file called 'volt_cont' is constantly being 
written to. This file stores environmental monitoring of 
system voltages. This is not a bug, and is working as 

Is there any way we can get RANCID to silence the changes in 
these files, without losing any changes to any other files 
in the same file systems?


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