[c-nsp] HSRP Packet Forwarding

[alaerte.vidali at nsn.com]

Hi Oliver,

>>Why are you asking?

It is related to issue when switch-1 is involved with layer 2 loop and
send back the HSRP packets to 7609-2.

Thanks,
Alaerte 

-----Original Message-----
From: ext Oliver Boehmer (oboehmer) [mailto:oboehmer at cisco.com] 
Sent: Monday, February 25, 2008 3:24 AM
To: Vidali Alaerte (NSN - BR/Rio de Janeiro); cisco-nsp at puck.nether.net
Subject: RE: [c-nsp] HSRP Packet Forwarding

alaerte.vidali at nsn.com <> wrote on Wednesday, February 20, 2008 1:44 PM:

>  Hi,
> 
> On the following topology:
> 
> 7609-1---------7609-2-------switch-1
> 
> 7609-1 and 7609-2 is configure for HSRP. All connections are Trunk, 
> transporting all Vlans. 7609-1 is the default gateway of HSRP group 1.
> When 7609-1 sends HSRP multicast to 7609-2, does 7609-2 forward this 
> multicast to switch-1?
> (that is, besides taking the HSRP multicast and processing it, 7602-2 
> forwards it to all interfaces on the same Vlan)

yes, it would forward it as there could be other HSRP speakers on the
same LAN. Why are you asking? If you are concerned about nodes connected
to switch messing around with your HSRP, use authentication on your HSRP
messages

	oli