[nsp] HSRP multicast & switch ports

[Terry Baranski]

> On Thursday, September 04, 2003 11:47 AM, Jochen Kaiser wrote:
> 
> > On Wed, Sep 03, 2003 at 11:10:07AM +0800, John Wong, Kok Seng wrote:
> > 
> > How do we prevent HSRP multicasts (224.0.0.2) being flooded
> > out ALL switch ports? We're running HSRP on Cat6500 MSFCs
> > and we're seeing the HSRP multicast packets on all the ports
> > in the HSRP VLAN connected to the switch.
> > 
> 
> The flooding is not only done for the routers. It's also 
> needed for the
> switches to make them learn where they can find the new originator
> of the virtual MAC address. By this they can update their CAM tables 
> with a single 'sweep'.
> IMHO if you disable the flooding, it will take your switchtes 
> longer to
> learn this.

Isn't this gone via gratuitous ARP?

-Terry