EAPS Shared Port Configuration Rules

The following rules apply to EAPS shared port configurations:

• Each common link in the EAPS network must have a unique link ID, which is configured at the shared port at each end of the link.
• The shared port mode configured on each side of a common link must be different from the other; one must be a controller and one must be a partner.
• The controller and partner shared ports on either side of a common link must have the same
• link ID. The common link is established only when the shared ports at each end of the common link have the same link ID.
• There can be up to two shared ports per switch.

• There cannot be more than one controller on a switch.

  Valid combinations on any one switch are:

  • 1 controller
  • 1 partner
  • 1 controller and 1 partner
  • 2 partners

• A shared port cannot be configured on an EAPS master‘s secondary port.

  

  Note

  When a common link fails, one of the segment ports becomes the active-open port, and all other segment ports are blocked to prevent a loop for the protected VLANs. For some topologies, you can improve network performance during a common link failure by selecting the port numbers to which segments connect. For information on how the active-open port is selected, see Common Link Fault Detection and Response.