About ed_fair

ed_fair · 04-14-2022

Hi,I'm trying to inter-operate a large Cisco switch with a small non-Cisco switch. There is a single connection between the two. In basic configurations the two work fine together, but in more complex configurations the Cisco is (correctly) err-dis...

ed_fair · 04-27-2022

I too have noticed unusual and unexpected behavior between Cisco PVST and non-Cisco MST equipment when a port is changed from access to trunk. I believe (!) the Cisco sends BPDU's to 01:80:c2:00:00:00 when in access mode, but 01:00:0c:cc:cc:cd in tr...

ed_fair · 04-21-2022

Just to finish this off, for those interested. I'm not seeking any further assistance, just posting this for your pleasure since you asked.Below is the the actual physical plant, showing the Data Center Routers and Switches at the top, all Cisco, ru...

ed_fair · 04-15-2022

Thank you - yes I agree with you about the loops. I will investigate further. My original question is answered but I will add some details to the picture and post them back here.

ed_fair · 04-15-2022

Your answers all are excellent and thoughtful, thank you. Unfortunately I have no lab at my disposal.Especially thank you @David Ruess for confirming what I've read previously – that enabling BPDUGUARD prevents debug logging of an offending BPDU. Tha...

ed_fair · 04-14-2022

Thank you - do you know if this command shows the SRC MAC or Sending Bridge ID of the BPDU when BPDUGUARD is enabled? I've not tested this myself but I've seen some comments that indicate a BPDUGUARD block prevents debug output. ed

Member Since	‎04-14-2022 04:26 AM
Date Last Visited	‎04-27-2022 10:01 PM
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Decoding BPDU's to determine sender

Re: pvst/rapid pvst port question

Re: Decoding BPDU's to determine sender

Re: Decoding BPDU's to determine sender

Re: Decoding BPDU's to determine sender

Re: Decoding BPDU's to determine sender