Dell PowerConnect B-FCXs Configuration Manual page 301

The priority <value> parameter specifies the priority of the bridge. You can enter a value from 0 –
65535. A lower numerical value means the bridge has a higher priority. Thus, the highest priority
is 0. The default is 32768.
You can specify some or all of these parameters on the same command line. If you specify more
than one parameter, you must specify them in the order shown above, from left to right.
Changing port parameters
The 802.1W port commands can be enabled on individual ports or on multiple ports, such as all
ports that belong to a VLAN.
The 802.1W port parameters are preconfigured with default values. If the default parameters
meet your network requirements, no other action is required.
You can change the following 802.1W port parameters using the following method.
PowerConnect(config)#vlan 10
PowerConnect(config-vlan-10)#spanning-tree 802-1w ethernet 5 path-cost 15
priority 64
Syntax: spanning-tree 802-1w ethernet <port> path-cost <value> | priority <value> |
The ethernet <port> parameter specifies the interface used. Specify the <port> variable in the
following formats:
•
The path-cost <value> parameter specifies the cost of the port path to the root bridge. 802.1W
prefers the path with the lowest cost. You can specify a value from 1 – 20,000,000.
shows the recommended path cost values from the IEEE standards.
TABLE 52
Link speed
Less than 100 kilobits per second
1 Megabit per second
10 Megabits per second
100 Megabits per second
1 Gbps per second
10 Gbps per second
100 Gbps per second
1 Terabits per second
10 Terabits per second
•
•
PowerConnect B-Series FCX Configuration Guide
53-1002266-01
[admin-edge-port] | [admin-pt2pt-mac] | [force-migration-check]
PowerConnect B-Series FCX stackable switches – <stack-unit/slotnum/portnum>
Recommended path cost values of 802.1W
The priority <value> parameter specifies the preference that 802.1W gives to this port relative
to other ports for forwarding traffic out of the topology. You can specify a value from 0 – 240, in
increments of 16. If you enter a value that is not divisible by 16, the software returns an error
message. The default value is 128. A higher numerical value means a lower priority; thus, the
highest priority is 0.
Set the admin-edge-port to enabled or disabled. If set to enabled, then the port becomes an
edge port in the domain.
Configuring STP related features
Recommended (Default) 802.1W
path cost values
200,000,000
20,000,000
2,000,000
200,000
20,000
2,000
200
20
2
Table 52
Recommended 802.1W patch cost range
20,000,000 – 200,000,000
2,000,000 – 200,000,000
200,000 – 200,000,000
20,000 – 200,000,000
2,000 – 200,000,000
200 – 20,000
20 – 2,000
2 – 200
1 – 20
8
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