Table 16. rstp auto-detect port trunk costs, Port priority value increments – Allied Telesis AT-S63 User Manual
Page 366
Chapter 20: Rapid Spanning Tree Protocols Commands
366
Section V: Spanning Tree Protocols
Table 16 lists the RSTP port costs with
Auto-Detect when the port is part of a port
trunk.
portpriority
Specifies the port’s priority. This parameter is used as a
tie breaker when two or more ports are determined to
have equal costs to the root bridge. The range is 0 to
240 in increments of 16, for a total of 16 increments, as
shown in Table 17. You specify the increment that
corresponds to the desired value. The default is 128,
which is increment 8.
edgeport
Defines whether the port is functioning as an edge port.
An edge port is connected to a device operating at half-
duplex mode and is not connected to any device
running STP or RSTP. The options are:
yes, on, true
The port is an edge port. The options
are equivalent. This is the default.
no, off, false
The port is not an edge port. The
options are equivalent.
Table 16. RSTP Auto-Detect Port Trunk Costs
Port Speed
Port Cost
10 Mbps
20,000
100 Mbps
20,000
1000 Mbps
2,000
Table 17. Port Priority Value Increments
Increment
Bridge
Priority
Increment
Bridge
Priority
0
0
8
128
1
16
9
144
2
32
10
160
3
48
11
176
4
64
12
192
5
80
13
208
6
96
14
224
7
112
15
240