[nsp] Redundancy options

[Steve Rude]

Hi Josh,

> which will result in 0 traffic traversing the routers.  Is there a
more
> elegant solution than hsrp for this setup?

Setup two 4500s, x.x.x.1 and x.x.x.2 on the "private" interface.  Setup
HSRP with x.x.x.3. Set preempt with priorities so the .3 will always go
to the "primary" 4500.

Have both "public" interfaces enabled on the HP.  Use the 'standby
track' command on each 4500 to have it watch the uplink interfaces.

Also it might be helpful to have each of the 4500s connect up to diverse
switches so that your single uplink switch going down will not take out
the entire colo as well.

I am not sure how you allocate IP space to customers, but if you assign
CIDR blocks will have to burn 3 ips for every customer in order to
implement this.  If you are assigning small blocks like /29s it will
waste a lot of IP space. The other thing you can do is to assign a /24
at a time to the 2400


HTH.

Steve Rude