4A0-D03: Nokia SR Linux EVPN and Data Center InterconnectDemo

By Nokia · Question Mode

QuestionQ20

L2 and L3 EVPN Multi-homing

A host connects to a MAC-VRF on leaf1 and leaf2. The MAC-VRF interfaces on leaf1 and leaf2 are associated with an Ethernet segment configured for active-standby multihoming.

Which of the following statements is FALSE?

  • A Leaf1 and leaf2 will hold an election to identify which leaf router will be the DF for the MAC-VRF.
  • B Only the DF will accept traffic from the host.
  • C The DF will forward all BUM traffic from the remote PEs to the host.
  • D The non-DF is capable of forwarding unicast traffic from the remote PEs to the host.
Explanation

In single-active (active-standby) EVPN multihoming, DF election selects the active PE for the Ethernet segment and MAC-VRF. The DF handles traffic toward and from the multihomed CE, including BUM traffic sent from remote PEs. Remote PEs direct unicast flows to the DF and use the non-DF only as a backup PE, so the non-DF does not forward that remote unicast traffic to the host.

Learn more

Community Discussion

No comments yet. Be the first to start the discussion!