Refer to the exhibit.
You have just created a new VRF on PE3. You have enabled debug ip bgp vpnv4 unicast updates on PE1, and you can see the route in the debug, but not in the BGP VPNv4 table. Which two statements are true? (Choose two)
- A. After you configure route-target import 999:999 for a VRF on PE1, the route will be accepted
- B. VPNv4 is not configured between PE1 and PE3
- C. address-family ipv4 vrf is not configured on PE3
- D. PE1 will reject the route due to automatic route filtering
- E. After you configure route-target import 999:999 for a VRF on PE3, the route will be accepted
Explanation: Because some PE routers might receive routing information they do not require, a basic requirement is to be able to filter the MP-iBGP updates at the ingress to the PE router so that the router does not need to keep this information in memory.
The Automatic Route Filtering feature fulfills this filtering requirement. This feature is available by default on all PE routers, and no additional configuration is necessary to enable it. Its function is to filter automatically VPN-IPv4 routes that contain a route target extended community that does not match any of the PE’s configured VRFs. This effectively discards any unwanted VPN-IPv4 routes silently, thus reducing the amount of information that the PE has to store in memory -> Answer ‘PE1 will reject the route due to automatic route filtering’ is correct.
More Questions: CCNP 350-401 Dumps