BFD over MCT and VxLAN

A BFD session between a client and an MCT (multi-chassis trunking) node is established over a directly connected Cluster Client Edge Port (CCEP) link or over an inter-chassis link (VxLAN).

Bidirectional Forwarding Detection over MCT and VxLAN is supported only for SLX 9150 and SLX 9250, SLX 9740, Extreme 8520, and Extreme 8720.

Note

BFD over MCT and VxLAN are software based on SLX 9150, SLX 9250, Extreme 8520, and Extreme 8720. For SLX 9740, all types of BFD Sessions are hardware based.

Data flows between client 1 and MCT 1, client 2 and MCT 1, client 1 and MCT2, client 2 and MCT2, and, over ICL or VxLAN, between MCT1 and MCT 2

BFD sessions that are configured on a CCEP interface on an MCT node are software-based in SLX 9150, SLX 9250, Extreme 8520, and Extreme 8720.

A BFD packet is sent with IPv4 or IPv6 and UDP headers if the local CCEP is UP.
A BFD packet is sent with VxLAN encapsulation on an ICL link if the local CCEP link is DOWN.

Note

BFD sessions that are configured on a CEP interface on an MCT node are hardware-based. Use the BFD engine to transmit the sessions.