Intermec 6710 manual Forwarding, Pending Messages

SECTION 2 " Features and Functional Overview

Access points automatically configure into a self-organized network using a spanning tree topology. They automatically reconfigure the network to maintain reliable operation as devices are added or removed, or in the event of some types of wired LAN failure. The spanning tree provides efficient, loop-free forwarding of frames through the network and rapid roaming of mobile stations within the network.

The spanning tree is initiated by the super root, an access point that coordinates the network and distributes common system parameters to other access points and stations. The super root is elected from a group of access points designated at the time of installation. The election process also occurs in the event of a super root failure, preventing a single point of failure.

Forwarding

The bridge maintains a forwarding database of all physical station addresses known to the access point, and the correct port for each address. This database makes efficient forwarding decisions in the bridging software.

The database is updated through monitoring addresses on each port, and by messages exchanged between access points when stations roam. The database also includes the power management status of each station, supporting the pending message feature of the network.

Pending Messages

Wireless stations may use power management to maintain battery life. These stations wake up periodically to receive messages that may have arrived while their radio was powered down. The bridging software provides a pending message delivery service, allowing frames to be held until the station is ready to receive them.

6710 Access Point User’s Guide 2-5