Re: What is the best way to detect a re-configured router?

Lee <[email protected]>
Newsgroups gmane.network.net-snmp.user
Message-ID <CAD8GWstpoLgSgROA3Jjvs7kKSe+mtr5iBHYAUHucHmRxDoTbZw@mail.gmail.com>
On 1/18/16, Bob Albrecht <[email protected]> wrote:

> Changing router firmware can take a long time. It's faster to pull the
> "route processor"/supervisor card and replace it with one that's already
> upgraded. The new card will have the same config, including engineID.
> However, counters such as engineBoots and engineTime will be reset.
>
> We see same engineID come up but with fewer engineBoots or lower
> engineTime, there is a security discrepancy that must be addressed.
>
> What is the authoritative way to detect this situation?

Keep track of the serial numbers on the various bits of hardware in the box.

I like RANCID - even if the config doesn't change you still get an
email showing the serial number / firmware version / software version
changes on the line cards.
  (note that "supervisor card" is a subset of "line card" :)

Regards,
Lee

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