Spanning Tree MSTP region and general STP question


Hi all,

I’m getting ready to decommission some Summit x450e’s and replace them with x460-G2’s. As I’m not very familiar with MTSP or Extreme in general and I’m looking for a little assistance. My plan is to create a trunk between the new 460 stack and one of the old switches and slowly move ports over so things can stay up while I’m doing it.



What I don’t grasp is the MTSP region. Does my new switch stack need to match the MTSP region on the switch I’m going to establish a trunk with? Currently there is no trunking between the old switches though.



As it is now, here is the config on one of the 450’s:



configure mtsp region xxxxxxxxx

configure stpd s0 delete plan default ports all

disable stpd s0 auto-bind vlan default

enable stpd s0 auto-bind plan Default



Coming from the Cisco world, should I lower the STP priority on the new stack before adding it? I’m so confused at this point. Appreciate any assistance.



J.

3 replies

As long as the STP on the root bridge is lower than the STP priority of another switch you deploy, it will be fine. I recommend code 23.3.1, it has a STP config similar to Cisco. Mucher easier to work with.
Jeremy Gibbs wrote:

As long as the STP on the root bridge is lower than the STP priority of another switch you deploy, it will be fine. I recommend code 23.3.1, it has a STP config similar to Cisco. Mucher easier to work with.

I'll give that a try Jeremy. Appreciate the tip. Can MTSP be left default on the new stack? From what I'm reading that may be a good idea.
Jeremy Gibbs wrote:

As long as the STP on the root bridge is lower than the STP priority of another switch you deploy, it will be fine. I recommend code 23.3.1, it has a STP config similar to Cisco. Mucher easier to work with.

I believe you can. Although you will probably want to turn on edge-safeguard and set your edge ports up correctly etc to stop ports going up and down from causing topology changes.
configure stpd s0 ports link-type edge 3:33
configure stpd s0 ports edge-safeguard enable 3:33
configure stpd s0 ports bpdu-restrict enable 3:33

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