D-Link DES-6300 User Manual page 119

Modular L3 Ethernet Switch User's Guide
Figure 6- 70. Spanning Tree Parameters window Bridge Setup Parameter tab
The Bridge Setup Parameter tab displays the following fields:
Bridge Priority – Identifies the bridge priority and is part of the bridge identifier.
The bridge identifier is 8 octets long, and the two most significant octets indicate
the bridge priority. The bridge with the lowest value is the root.
Bridge Max Age (Seconds) – Indicates the amount of time a bridge waits before
implementing a topological change. The possible values are 6-40 seconds. The
default is 20 seconds. This parameter is configured on all the bridges participating
in the STP, but only the one belonging to the elected Root Bridge is used. It is
strongly recommended to use:
•
Bridge Hello Time (Seconds) – Indicates the amount of time a root bridge waits
between configuration messages. The possible values are 1-10 seconds. The
default is 2 seconds. Lengthening the Bridge Hello Time lowers the overhead time
of the Spanning Tree Protocol (STP).
Bridge Forwarding Delay (Seconds) – Indicates the amount of time a bridge
remains in a listening and learning state before forwarding packets. The possible
values are 4-30 seconds. Bridge Forward Delay is also used when a topology
change is detected. Bridge Forward Delay ensures that Bridges use a consistent
value for the Forward Delay Timer when changing the Port State to forwarding.
The default is 15 seconds.
Max age ≥ Hello time x 2 + 1.0s.
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