[nsp] HSRP and VLANs

[Jason Lixfeld]

As I understand it, you need at least 3 IPs to do HSRP for one subnet 
or VLAN.  One IP for each physical interface on the router and one 
virtual IP which becomes the host's default gateway.  By the sounds of 
it, you may need to expand the subnets for each of those 50 VLANs (if 
you have promised each customer in the vlan 6 or 14 usable IP 
addresses, depending) for each  .  I don't know if you can do 
unnumbered HSRP.

On Dec 16, 2003, at 7:31 AM, Marco Matarazzo wrote:

> Hi all,
>
> right now I terminate the customer circuits on a single Cisco 7204VXR,
> speaking BGP with two upstreams, and delivering all the vlans to colo
> customers.
> I've been asked to add redundancy at routing level, and I was planning 
> to
> add another Cisco 7204, speaking BGP with one upstream, and let the 
> other
> Cisco speak BGP with only the other one. The two routers will of 
> course iBGP
> between them. Now the question: we have 50 vlans, each one assigned 
> his /28
> or /29 depending on the customer, so I've 50 different default 
> gateways. Is
> that possible to do HSRP between the two routers on such a number of 
> IPs?
> (And have space to grow of course!). Or is there some other way to do 
> it?
>
> Thanks a lot!
> ]\/[arco
>
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