Confirmation on how to configure the root bridge, rapid pvst
Folks, on a given 3750 switch I do 'show vlan' and I see vlan 1,3,4 and 7.
spanning-tree mode is rapid-pvst.
Can you confirm if I do:
"#spanning-tree vlan 1,3,4,7 root primary"
is the right way to make this is the root brige. I am just wondering what happens if I assign a new vlan... then it means I would need to add to the spanning-tree vlan <> root command. This sounds strange.
Re: Confirmation on how to configure the root bridge, rapid pvst
"hen I need to go to all other 7 switches and set 'spanning-tree vlan 1,3,4,7 priority 16384"
No you don't. You choose one other switch and configure that as the secondary root and that is it. You do not need to do anything on the other 6 switches. By default the STP priority on a switch is 32768 or 32768 + vlan ID if using extended system-id.
So the switch with priority of 8192 is the root and the switch with the 16384 priority is the secondary root ie. there in case of failure of root switch.
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