Dell PowerConnect FCS624S Configuration Guide - Page 301

Configuring STP related features 8 The priority 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 path-cost | priority | [admin-edge-port] | [admin-pt2pt-mac] | [force-migration-check] The ethernet parameter specifies the interface used. Specify the variable in the following formats: • PowerConnect B-Series FCX stackable switches - The path-cost 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. Table 52 shows the recommended path cost values from the IEEE standards. TABLE 52 Link speed Recommended path cost values of 802.1W Recommended (Default) 802.1W path cost values Recommended 802.1W patch cost range Less than 100 kilobits per second 200,000,000 1 Megabit per second 20,000,000 10 Megabits per second 2,000,000 100 Megabits per second 200,000 1 Gbps per second 20,000 10 Gbps per second 2,000 100 Gbps per second 200 1 Terabits per second 20 10 Terabits per second 2 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 • The priority 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. PowerConnect B-Series FCX Configuration Guide 259 53-1002266-01