Asante Technologies 9000 manual Forward Delay, Port Priority

Advanced Management

another BPDU, it assumes that a change in the topology has occurred and begins recalculating the spanning tree.

Forward Delay

The Forward Delay parameter regulates the delay before each port begins transmitting traffic after a recalculation of the spanning tree. If a port begins forwarding traffic too soon, the network can be adversely affected. The permitted range of the Forward Delay is 4 to 30 seconds.

◆Note: The Hello Time, Maximum Age, and Forward Delay are constrained by the following formula:

(Hello Time + 1) <= Maximum Age <= 2 x (Forward Delay -1)

In general, reducing the values of these timers will make the spanning tree react faster in the case of changes in the topol- ogy, but may cause temporary loops as the tree stabilizes in a new configuration. Lengthening the timers will make the tree react more slowly to changes in configuration but will make an unintended reconfiguration less likely. All of the bridges in the tree must agree on the values of these timers, so each bridge uses the ones advertised by the root.

Port Priority

If two ports are connected to the same segment, the manager can affect the probability that either one will be chosen for inclusion in the tree by changing this value.

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