Which action should be performed on the routers to accomplish this task?

A network engineer is configuring RIP as the routing protocol between multiple PEs and CEs. The engineer must avoid advertising the same routes back to their sources.

Which action should be performed on the routers to accomplish this task?
A . Configure a different route distinguisher for each prefix.
B. Define the site of origin on each interface.
C. Define VRFs on each device to separate the traffic.
D. Enable bidirectional forwarding detection on each device.

View Answer

Answer: B

Explanation:

Although the SoO is set on BGP address family configuration mode not interface mode, but it is applied to the interface based on this reference. "The configuration of the SoO extended community allows MPLS VPN traffic to be filtered on a per-site basis.

The SoO extended community is configured in an inbound BGP route map on the PE router and is applied to the interface."

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst3850/software/release/16-12/configuration_guide/mpls/b_1612_mpls_3850_cg/configuring_eigrp___mpls_vpn_pe_ce_site_of_origin.pdf