Setting The Root Bridge For More Than One Vlan On A Set/Clear Command−Based Switch; Assigning A Port Cost To A Port Using The Set/Clear Command−Based Ios; Assigning A Port Cost To A Port Using A Cli−Based Switch - Cisco RJ-45-to-AUX Brochure

secondary (optional)
n (optional)
dia n (optional)
hello n (optional)
Setting the Root Bridge for More than One VLAN on a Set/Clear
Command−Based Switch
To set the primary root switch for more than one VLAN on a Set/Clear−based switch, use the Privileged mode
command to change configuration to a root bridge. The default priority automatically changes to 8,192, which
is the default when the command is used to configure the switch as the root bridge. Use the following
command to specify the root bridge:
set spantree root <root|secondary> <VLAN list> dia <diameter>
The following command specifies the root bridge for VLANs 1 through 3:
set spantree root 1−3 dia 2
When the root bridge is configured correctly, the output on the console should be similar to this:
VLANs 1−3 bridge priority set to 8192
VLANs 1−3 bridge max aging time set to 10 seconds.
VLANS 1−3 bridge hello time set to 2 seconds.
VLANS 1−3 bridge forward delay set to 7 seconds.
Switch is now the root switch for active VLANs 1−3.
Assigning a Port Cost to a Port Using the Set/Clear
Command−Based IOS
To manually change the port cost on a Set/Clear command−based switch, use the following Privileged mode
command:
set spantree portcost <module/port> <port cost>
In the following example, 5 is the module number, 2 is the port number, and 100 is the configured port cost:
set spantree portcost 5/2 100
Assigning a Port Cost to a Port Using a CLI−Based Switch
To manually change the port cost on a Cisco IOS−based switch, use this Interface Configuration mode
command:
spantree cost <port cost>
Used to designate the switch as a secondary root switch if the root bridge
fails. The default priority of the secondary bridge is 16,384.
Specifies the VLAN. If you do not specify the VLAN, VLAN 1 is used.
The valid value range is 1 through 1,005.
Specifies the diameter value discussed earlier in the chapter. It is
essentially the number of bridges between any two points. The diameter
should be measured starting from the root bridge. Valid values are 2
through 7.
Specifies in seconds how often configuration messages should be
generated by the root switch. The valid values are 1 through 10.
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