VPLS and VLL MCT on the SLX 9640 and 9540 devices

On the SLX 9640 and SLX 9540 devices, VPLS and VLL MCT are used for data center interconnection in which SLX-OS MCT acts as a data center gateway to connect to another data center through either the VPLS or VLL WAN connection.

Note

For more information on VPLS and VLL, refer to the "VPLS and VLL Layer 2 VPN services" chapter.

For VPLS MCT, a point-to-multipoint (p2mp) bridge domain is added to the MCT cluster. For VLL MCT, a point-to-point (p2p) bridge domain is added to the MCT cluster. The VPLS or VLL horizon is added as a pseudowire (PW) client.

VPLS/VLL MCT supports PW redundancy. At any point of time, one active-active PW path exists to reach the destination. The node on which the PW is active is called the active node. The endpoint traffic coming from the standby node traverses through the MCT ICL session to the active node for that instance and the active MCT node takes care of the forwarding to the remote VPLS or VLL peer.

Note

For SLX-OS, the MCT cluster requires both nodes to be on SLX-OS devices. However, an SLX-OS MCT cluster that connects to a Extreme MLX cluster through VPLS or VLL is supported.