Solution 2 — Remote site iBGP

A

Internet Gateway Router

B

Remote Site Core Routing Switch

C

Remote Site Distribution Routing Switch

D

Remote Site Edge Switches

You have the alternative of using static routes or BGP to connect to your service provider. For multi-homing or policy control, you can choose to deploy BGP. This may be used for internet connectivity. Foundation iBGP solutions do not carry full internet routing tables, so the diagram above requires that 1) only default routes are taken from the internet and 2) multiple VRF instances do not exist at a single physical remote site.

The deployment of device A may require additional traffic shaping and scalability features. If you prefer extending BGP routing to devices B or C, you can use BGP functionality on a routing switch. In this deployment model, the routing switch would be used for route redistribution and the marking of communities.