topic Re: Spanning tree disabled in ExtremeSwitching (ERS)

Spanning tree disabled

msyousef — Fri, 25 Aug 2023 17:00:15 GMT

i'm just new in Extreme and have hire in Extreme Enviroment , aftre check all availabe ERS switch in my

orgnization i found Spanning tree is disbled in all ERS switches and this can cuase L2 loop , please i need ecommendation about this issue why is disabled and what if i enable it is there any impact will happend

please note it's disabled on all interfaces not only the uplinks

Re: Spanning tree disabled

BrianT — Sat, 26 Aug 2023 15:21:45 GMT

It is possible that the switch have ISIS configured. Extremes fabric configuration leaves spanning tree disabled.

Re: Spanning tree disabled

msyousef — Sun, 27 Aug 2023 07:24:01 GMT

no it's switch engine not fabric engine

Re: Spanning tree disabled

Anthony_S — Mon, 28 Aug 2023 14:36:12 GMT

Spanning Tree will be disabled on a port that is not a member of any VLANs. If you're making a VLAN changes using EDM and apply the removal and add in a single step, I've seen it disable spanning tree because of the order it writes the changes.

If all the ports are members of VLANs now, you can enable spanning tree in CLI using:

interface Ethernet ALL

spanning-tree learning fast

Re: Spanning tree disabled

msyousef — Fri, 01 Sep 2023 17:08:52 GMT

can you please explain why is disabled as below

spanning-tree mstp port 1/ALL learning disable
spanning-tree mstp port 2/ALL learning disable
spanning-tree mstp port 3/ALL learning disable
spanning-tree mstp port 4/ALL learning disable