Re: Diffrence between spanningtree primary and spantree priority
"spanning-tree vlan 1 root primary" means the switch will set it's own priority lower than any priority it sees from other switches so the value is not always the same - it's just going to be the lowest vlaue and a multiple of 4096.
"spanning-tree vlan 1 priority 0" explicitly sets the priority to be 0 and if there is no other switch with 0 then it will become root. Generally a good root value is 8192 and a secondart value 16384 but these will only work if all the other switches are using default values ie. you haven't modified them.
One of the reasons you wouldn't want to use second command "spanning-tree vlan 1 priority 0" is that it gives you nowhere to go. If you wanted to promote another switch to be the STP root you have no value below 0 and the "spanning-tree vlan 1 root primary" would never work because it can't go lower than 0.
We are pleased to announce availability of Beta software for 16.6.3.
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