Filter
Top Products
Advanced Management
Page 5-4
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.
GLXY9.book Page 4 Thursday, February 17, 2000 3:04 PM