Allied Telesis AT-S62 - Manual (Page 275)

AT-S62 Management Software Web Browser Interface User’s Guide
Section IV: Spanning Tree Protocols 275
2. Adjust the STP bridge settings as needed. The parameters are
described below.
Bridge Priority
The priority number for the bridge. This number is used in determining
the root bridge for RSTP. The bridge with the lowest priority number is
selected as the root bridge. If two or more bridges have the same
priority value, the bridge with the numerically lowest MAC address
becomes the root bridge. When a root bridge goes off-line, the bridge
with the next priority number automatically takes over as the root
bridge.
This parameter can be from 0 (zero) to 61,440 in increments of 4096,
with 0 being the highest priority. There are sixteen increments. You
specify the increment representing the desired bridge priority value.
The increments are shown in Table 7.
Bridge Hello Time
The time interval between generating and sending configuration
messages by the bridge. This parameter can be from 1 to 10 seconds.
The default is 2 seconds.
Bridge Forwarding Delay
The waiting period in seconds before a bridge changes to a new state,
for example, becomes the new root bridge after the topology changes.
If the bridge transitions too soon, not all links may have yet adapted to
the change, resulting in network loops. The range is 4 to 30 seconds.
The default is 15 seconds.
Bridge Max Age
The length of time after which stored bridge protocol data units
(BPDUs) are deleted by the bridge. All bridges in a bridged LAN use
Table 7. Bridge Priority Value Increments
Increment
Bridge
Priority
Increment
Bridge
Priority
0 0 8 32768
1 4096 9 36864
2 8192 10 40960
3 12288 11 45056
4 16384 12 49152
5 20480 13 53248
6 24576 14 57344
7 28672 15 61440