topic RE: Extreme Summit X670V STP disabled by default, it still will send BPDU package? in ExtremeSwitching (EXOS/Switch Engine)

Extreme Summit X670V STP disabled by default, it still will send BPDU package?

Wallance — Thu, 21 May 2015 07:09:00 GMT

I just wanted to know if it still will send BPDU package when STP not enabled on Extreme Summit switch. From my understanding, it should not send BPDU message when STP not enabled. The background - As in our Production Env, we enabled BPDU guard on cisco Nexus 7K one Trunk port connected to a Summit X670V switch to root guard. However, a mistaken operation on the Summit switch by putting all port to a VLAN cause the Cisco switch received a large of BPDU package then put the port on the err-disabled status.

RE: Extreme Summit X670V STP disabled by default, it still will send BPDU package?

BrandonC — Thu, 21 May 2015 07:26:00 GMT

Hi Wallance,

The X670V will not send BPDUs when STP is disabled. However, it will forward any BPDUs that it receives, as the switch sees them as standard multicast frames.

-Brandon

RE: Extreme Summit X670V STP disabled by default, it still will send BPDU package?

Wallance — Thu, 21 May 2015 07:31:00 GMT

Great! So I guess that maybe the other switch uplinked to the summit switch send the BPDU message,then the summit switch forwarded it to uplinked cisco switch. Thanks for your timely response. 

RE: Extreme Summit X670V STP disabled by default, it still will send BPDU package?

EtherMan-Dupe — Thu, 21 May 2015 08:26:00 GMT

You should always adjust Cisco interfaces and their default BPDU protection to either trap only .... disable / enable after xxx time period when you connect from switch to switch... It is a ticking time bomb .....

RE: Extreme Summit X670V STP disabled by default, it still will send BPDU package?

PeterK — Wed, 29 Jun 2016 19:07:00 GMT

I know, this is old, but what do I need to do, that the switch will not forward BPDUs anymore?

RE: Extreme Summit X670V STP disabled by default, it still will send BPDU package?

BrandonC — Wed, 29 Jun 2016 19:35:00 GMT

You can block the BPDUs via an ACL on the port, if you want the switch to not forward them. See the following GTAC Knowledge article for details:
https://gtacknowledge.extremenetworks.com/articles/How_To/How-to-block-BPDU-packets-on-a-port-via-AC...

-Brandon

RE: Extreme Summit X670V STP disabled by default, it still will send BPDU package?

PeterK — Thu, 30 Jun 2016 12:50:00 GMT

thanks, this helps a lot.