[c-nsp] HSRP vs VRRP

[Gert Doering]

Hi,

On Thu, Oct 20, 2005 at 02:21:39PM -0400, Tim Durack wrote:
> > So I need to ask my question again: how do you *do* this on the routers?
> >
> > To make HSRP work, all interfaces need to be in the *same* Layer3 network
> > segment - and Cisco routers are fairly unwilling to tolerate that, unless
> > you do etherchanneling (or "backup interface") stuff.
> 
> RTR-1 connects to SW-1, x.x.x.3 is the interface address, x.x.x.1 is
> the standby ip.
> RTR-2 connects to SW-1, x.x.x.4 is the interface address, x.x.x.1 is
> the standby ip.
> 
> RTR-1 connects to SW-2, y.y.y.3 is the interface address, y.y.y.1 is
> the standby ip.
> RTR-2 connects to SW-2, y.y.y.4 is the interface address, y.y.y.1 is
> the standby ip.

So, which IP addresses do the hosts have?  x.x.x.z or y.y.y.z?

> Standard L3 routers and L2 switches employed.

Sure, but what are you gaining from that setup?  Your end systems are
not in both network x.x.x and y.y.y at the same time - so your second set
of router interfaces just made the setup much more complicated, and the 
same issues remain.

gert
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Gert Doering - Munich, Germany                             gert at greenie.muc.de
fax: +49-89-35655025                        gert at net.informatik.tu-muenchen.de