Connecting S-series with X450-G2, RSTP Error: "Multiple BPDU sources received"

[M_Nees]

i connect a s-series (Core - V8.31.01) with a X450-G2 (Edge, V15.6.1) with configured RSTP.

Immediatelly with the first connect of this 2 switches, the s-series complaining with:
S8(su)-><165>Sep 18 18:49:04 172.16.255.248 LinkTrap[1]Interface tg.1.1 is Down.
<165>Sep 18 18:49:04 172.16.255.248 Spantree[1]Receive Event: Multiple BPDU sources received on Port = tg.1.2, BPDU Bridge MAC = 00:04:96:99:a1:e5 Port = 52 Prior Bridge MAC = 00:1f:45:5c:a9:00 Port = 258

S8(su)-><165>Sep 18 18:49:23 172.16.255.248 LinkTrap[1]Interface tg.1.1 is Up.
<165>Sep 18 18:49:23 172.16.255.248 Spantree[1]Receive Event: Multiple BPDU sources received on Port = tg.1.1, BPDU Bridge MAC = 00:04:96:99:a1:e5 Port = 49 Prior Bridge MAC = 00:1f:45:5c:a9:00 Port = 257

What does this error message will tell me ??

Regards

[Mike_D]

Hey Matthias,

Looks like GTAC sees the same 'multiple bpdu sources' message you see if your config is used in our lab.
That's destined to be another fix out of the way - for you and for the rest of us.

Thank you for the follow up.
Regards,
Mike

[M_Nees]

Hi Michael,

thanks for your apply.

The 2 macs are the mac of the S-series (= root bridge) and the summt switch. between these 2 switches and a second s-series (core switch --> no VSB) we have 2 gigabit fiber links. STP should block one of two - for redundancy.

i had opened a GTAC case (01154370) - but no resolution since opening.

Regards

[Mike_D]

Hello Mathias,

Take this message literally.
The S pt-pt rstp link rx's a bpdu from 2 sources - conflicting info.

It's the first data point in your investigation. Do these two switches own these macs? Is there a multi-link connection involved - static or otherwise?

With no knowledge of config on either side and without state and stats info to support analysis, a stab at root cause would be speculation.

If that somehow points you toward a resolution please let us know how it turned out.

If you're able to tell us more it will give the community better traction. We'll work on getting you fixed up.

Regards,
Mike