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List:       ietf-vrrp
Subject:    Re: [VRRP] conflicting MAC addresses
From:       jamal <hadi () cyberus ! ca>
Date:       2002-08-28 12:28:33
Message-ID: Pine.GSO.4.30.0208280821440.15191-100000 () shell ! cyberus ! ca
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Danny,
I agree with your point view in general;
Apart from the "value-adding" crowd, this could be a result of a
misconfiguration; the problem is clearly avoided when the OUIs are
known to be owned by vendors who take a lot of care ensuring they dont
get rotated in decade time-frames. How do you do the same for a
MAC address which is reusable like the VRRP ones are? The dangers of
conflict are pretty high as we have seen.

cheers,
jamal

On Tue, 27 Aug 2002, danny mitzel wrote:

>
> --- jamal <hadi@cyberus.ca> wrote:
>
> > A CISCO running HSRP on the same network is
> > 00-00-5E-00-01-1F;
>
> the original rfc submitted to document hsrp
> (rfc2281) states the hsrp mac is from the cisco
> oui (00:00:0c:07:ac:{hsrp group number}).  from
> the latest ios 12.2 docs online this still seems
> unchanged.  my only guess would be that someone
> has used a 'value add' ios feature
> [e.g. standby mac-address <mac-address>] to
> utilize non-standard hsrp group mac address.
> not a very smart idea IMO.
>
> later,danny
>
>
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