Allied-telesis AT-S62 Manual do Utilizador descarregar pdf (Página 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

1 2 ... 270 271 272 273 274 275 276 277 278 279 280 ... 371 372

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