[nsp] HSRP protocol extensions?

[Papo, Rick]

I have several packet traces showing this.  I had come to the conclusion
that Cisco had extended the standard, and I am currently trying to track
this down also.  Any information you've discovered would be appreciated.

	Rick Papo
	Compuware Corporation

> On Fri, May 09, 2003 at 05:47:40PM +0200, PONDEMER Nicolas wrote:
> > we saw with a sniffer the "3"  strange Cisco HSRP opcode (not in RFC
2281)
> > in a network.
> 
> If you ask your Cisco router - by doing "debug standby" - it seems to
> identify those packets as "Redirect advertisements".  I've asked about
> this previously, and never got any response.  It looks like Cisco has
> extended the protocol since RFC-2281.  I discovered this when I upgraded
> to 12.2 - my 12.0 routers began complaining about a "malformed packet"
> for all the opcode 3 packets.  I haven't found any documentation
> on it other than what "debug standby" told me.
> 
> If anyone knows more, or can point to any published specs on Cisco's
> site, I'm quite curious also.
> 
> 	-- Ed




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