[no subject]

Stephen Kratzer
Network Engineer
CTI Networks, Inc.

On Tuesday 30 June 2009 09:54:29 neal rauhauser wrote:
>    I have a network with two upstreams that land in datacenters many miles
> apart. The hardware involved is Cisco 7507s with RSP4s and VIP4-80. I've
> got a curious problem which I hope others here have faced.
>
>    A while ago we got a /28 from each provider and attached it to a
> dedicated fast ethernet interface at each location. Inbound traffic arrives
> normally and anything arriving on that port is policy routed to the
> upstream that provided the prefix.
>
>    This was all well and good when it was a little firewall with a Linux
> machine  behind it being used to check latency and do other diagnostics,
> but the sales people noticed it and have lined up a couple of opportunities
> to sell a service that would depend on our being able to receive and send
> traffic from blocks less than a /24.
>
>    The policy routing works fine at low volume, but the RSP4 is rated to
> only do four megabits and I know they're going to exceed that.
>
>    I can terminate this subnet on another router, wire that device into the
> 7507 with a crossover, and establish a BGP session. I'm wondering if there
> is a tidy way to set next hop in some fashion using route-maps such that
> all the marking would be done on the auxillary machine and the traffic
> passing through the 7507 would be CEF switched rather than process
> switched.