Spanning Tree MST per Vlan, best practice

[Patrick Werner]

Hi Community.

I did the following MST Spanning Tree Config

spanning-tree mst configuration

  name xxxxxxx

  revision1

  instance 1 vlan 1, 10-20, 25, 30

So I added every Vlan to the config which we use. But every time when I add one more vlan to the config the whole network get a little outage.

I see lots of MAC Flaps on ports with two Server links and the outage is for some seconds.

Is it a better practice to add all possible Vlans to the config. So I do the config like that:

  instance 1 vlan 1-4096

What you think.

Best Regards patrick

[Reza Sharifi]

Hi,

So I added every Vlan to the config which we use. But every time when I add one more vlan to the config the whole network get a little outage.

Correct, that is normal behavior with MST.

I would just add "instance 1 vlan 1-4094" this way there is no outage when you bring up a new vlan.

HTH