Linking two sites together with layer 2 ethernet private line
Hope you can help.
We have 2 sites (number of switches in each site working fine) which we want to link together.
We have purchased a 100mb layer 2 ethernet circuit from a carrier (similar to BT's LES 100) which we will use to link the sites.
As we have only purchased one circuit, there will only be one interconnect between sites.
I was planning on creating a new VLAN on the switches that we will be linking across sites, and connecting this new circuit to the ports within this VLAN. I will also have a router at each site in the same VLAN to move traffic beween subnets at each site.
My question relates to spanning tree - MSTP.
Basically as I have no direct control over this new circuit (which can go up and down if the carrier does some maintenance etc), I think it would be good to disable spanning tree on the ports we connect this circuit to (on each switch) as I do not want any disconnects on this circuit to force spanning tree to recalculate / re-converge etc to the rest of the switches / vlans at each site (which will cause brief outages whilst doing so).
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