We are about to deploy a WAAS network with 16 remote sites. We will have 4 WAE-612 at the core site and 1 (or 2 at a few key sites) WAE-512 at the remote sites. The core site is connected to the WAN (MPLS IP VPN from a service provider) with a 2851 which we intend using to do WCCP redirection. At the remote ends 2811 will do the WCCP redirection. The remote links vary from 2Mbit/s to 10Mbit/s, with the core link currently being 30Mbit/s (although this is likely to increase soon to 50Mbit/s). The core link averages about 20Mbit/s during the day, peaking at about 28Mbit/s for small periods.
Will the 2851 and 2811 routers be quick enough to do the WCCP redirection or would it be better to buy some 3560 switches for the core? On the 2800 routers what method would be best to use, IP forwarding or negotiated return? There are no free interfaces, so the IP forwarding would have to be done using sub-interfaces.
As part of the project we will be migrating mail and file service to the core. I realise that until we put it all in and see the what the traffic is, we will not know for sure what we will need, but I would welcome recommendations on router or switch choices.
The platforms you have in place should be ok. Our testing has shown the 2851 can exceed 500Mbps throughput when WCCP is enabled and the 2811 can reach almost 100Mbps.