Requirements and Limitations

The solution shown in VPLS EAPS Redundancy Overview has the following requirements and limitations:

• The redundant VPLS nodes must be core nodes.
• An EAPS common link is required between the redundant VPLS nodes.
• The redundant VPLS nodes (Core 1 and Core 2) use PWs to connect to each other and the other core nodes (Core 3 and Core 4).
• The redundant VPLS nodes use PWs to support the EAPS-protected VLANs, not the EAPS common link.
• Works only with EAPS customer attachment ring.
• The EAPS master should not be on a VPLS node.
• EAPS state used by VPLS to control state of PWs (Active/Ready).
• EAPS monitors common link state and ring state.
• VPLS on controller node uses EAPS state to set Active/Ready PWs.
• EAPS blocks customer-facing ports as normal.