Intermec 6710 manual Establishing and Maintaining Tunnels, Redundancy

APPENDIX E " OWL/IP

If a super root candidate receives a hello from an access point with a higher root priority (or equal root priority from a higher MAC address), it stops sending hellos. This root election protocol continues until only one super root access point sends hellos. After the super root is established, other access points attach to the super root forming the spanning tree.

Establishing and Maintaining Tunnels

Once a super root is elected, it begins to forward hello messages to IP addresses configured in the OWL/IP menu. Designated bridge candidates on a remote subnet use bridge priority in a similar election procedure to determine which access point serves as designated bridge for that subnet.

Once a designated bridge is elected, it attaches to the super root, indicating that it is the designated bridge for the subnet. Designated bridges are responsible for forwarding hellos to other access points on the local subnets. These hellos indicate to other access points that they are the designated bridge for that subnet.

Redundancy

The super root and designated bridge election procedure are repeated if the current super root or designated bridge stops sending hellos. This provides redundancy in the event of an isolated access point, router, power, or cabling failure.

Normally, one primary and one or two fallback super root candidates are sufficient for super root redundancy. One primary designated bridge and one fallback are recommend for most remote subnet installations. The number of remote subnets and redundancy needs on each subnet influences the selection of address types in the [IP Addresses] menu. See the configuration examples on page E-13.

E-106710 Access Point User’s Guide