The PW state in VPLS or VLL MCT is controlled by two entities. The MCT module controls its MCT state. The PW remote peer provides its PW redundancy state. Together, they decide the operational (forwarding) state of the PW. The following table shows the PW state decisions.
| MCT state | PW remote state | Operational state | PW signaling state |
|---|---|---|---|
| DF | Active | Active | Active |
| DF | Standby | Standby | Active |
| Non-DF | Any | Standby | Standby |
When the PW is in active operational state, the data plane objects (such as LIF or MGID, or cross-connect for VLL) is created and be programmed into the hardware. When the PW is in standby operational state, the data plane is programmed as if this PW is down.
Note
The SLX-OS PW state table is the same as the Extreme NetIron VPLS-MCT or VLL-MCT PW state table to ensure compatibility when facing an MLX MCT cluster over a VPLS or VLL connection.