If servers in a subnet must be routed to a dedicated router and their SVI is on the core routing switch, which configuration best achieves this routing requirement?

If servers in a subnet must be routed to a dedicated router and their SVI is on the core routing switch, which configuration best achieves this routing requirement?

• A. Configure a new OSPF area including both the core routing switch and the dedicated router
• B. Configure a BGP link between the core routing and the dedicated router and route filtering
• C. Configure Policy Based Routing (PBR) on the core routing switch for the VRF with the servers SVI
• D. Configure a dedicated VRF on the core routing switch and make the dedicated router the default route.

Answer: (C)

Policy Based Routing is used to steer traffic from a specific subnet to a designated next-hop while leaving the SVI on the core intact. By configuring a route-map that matches the server subnet’s source IPs and sets the next-hop to the dedicated router (often within a VRF for isolation), traffic from those servers is forced to the dedicated router regardless of the usual IGP/BGP path selection. The servers’ SVI remains on the core, so they continue to terminate on the core’s L3 interface, but their outbound traffic follows the PBR rule to the separate router. This exact mechanism satisfies routing that targets just that subnet without reconfiguring broader routing domains or sending all traffic through the dedicated router.

Policy Based Routing is used to steer traffic from a specific subnet to a designated next-hop while leaving the SVI on the core intact. By configuring a route-map that matches the server subnet’s source IPs and sets the next-hop to the dedicated router (often within a VRF for isolation), traffic from those servers is forced to the dedicated router regardless of the usual IGP/BGP path selection. The servers’ SVI remains on the core, so they continue to terminate on the core’s L3 interface, but their outbound traffic follows the PBR rule to the separate router. This exact mechanism satisfies routing that targets just that subnet without reconfiguring broader routing domains or sending all traffic through the dedicated router.