This can happen if your spanning-tree root is the HSRP standby and the
L2 access switch uplink to the active is in blocking. The packet will
be bridged through the standby to then be routed by the active. To
prevent this it makes sense to have the STP root for a vlan be the
same as the active router.
Same idea applies to the PIM DR for mcast.
-Ben
On Jun 17, 2010, at 2:24 PM, Chris Boyd wrote:
Having a discussion with a colleague about forwarding on HSRP. I
seem to remember seeing datagrams that were addressed to the virtual
IP address, but were delivered to the standby router getting
forwarded from the standby to the active for routing.
It's been a while since I looked at HSRP in the lab, and I'm about
to hop on a plane, so I appeal to the net.wisdom :-)
Thanks,
-Chris
_______________________________________________
cisco-nsp mailing list [email protected]
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/
_______________________________________________
cisco-nsp mailing list [email protected]
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/
