Edge B20 Pass-thru and 802.1X and MAB

Mark_123456789 · ‎08-02-2023

Hi all,

Have deployed Edge B20, connected to Cisco catalyst in a DOT1X Authentication environment. For authentication, laptops use certificates, whereas IP Phones (Edge B20 use MAB (mac address by-pass).

Cisco switch is set to permit 3 (MAC) devices on a single port and data/voice is split on seperate vlans.

Everything works ok, for a while. An as yet unknown trigger will result in the switch port going into error disable (as is set) after seeing a violation message on the switch. Its not affecting Cisco IP Phones, only Poly Edge B20 and only when using the pass-thru with docking station or laptop connected. Basically, the switch port is shutdown, so the Poly edge b20 stops working.

Has anyone also experienced this issue and do they know the root cause?

Thanks in advance, Mark

SteffenBaierUK · ‎08-04-2023

Hello @Mark_123456789

welcome to the Poly community.

I suggest you look at:

Jun 25, 2012 Question: How can I add an 802.1x EAP-PEAPv0/MSCHAPv2 Certificate or use Dot.1x?

Resolution: Please check => here <=

The above also covers the Edge B phones.

For any follow up please work with our support team in the region as we need more details.

Best regards

Steffen Baier

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Notice: I am an HP Poly employee but all replies within the community are done as a volunteer outside of my day role. This community forum is not an official HP Poly support resource, thus responses from HP Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge.
If you need immediate and/or official assistance for former Poly\Plantronics\Polycom please open a service ticket through your support channels
For HP products please check HP Support.

Please also ensure you always check the General VoIP , Video Endpoint , UC Platform (Microsoft) , PSTN

Mark_123456789 · ‎08-09-2023

Hello Steffen,

Many thanks for responding on my post. A support request was raised with Poly on the same day originally posted this in the community. I am still awaiting Poly support to pickup the ticket. Its a P3, so unclear how many work days that needs to be responded within - with account manager out on holiday, I guess its understandable my other usual contacts are out too.

It's the behaviour of MAB in the setup that I was researching, though your other post was useful to read.

Regards, Mark

SteffenBaierUK · ‎08-09-2023

Hello @Mark_123456789

sharing the support ticket will allow me in my day role to double-check where this is stuck.

We may need a wireshark from a spanned port, a debug log from the switch, and depending on what 802.1x solution is used the event logs if this is a windows machine.

Best regards

Steffen Baier

------------------------------------------------
Notice: I am an HP Poly employee but all replies within the community are done as a volunteer outside of my day role. This community forum is not an official HP Poly support resource, thus responses from HP Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge.
If you need immediate and/or official assistance for former Poly\Plantronics\Polycom please open a service ticket through your support channels
For HP products please check HP Support.

Please also ensure you always check the General VoIP , Video Endpoint , UC Platform (Microsoft) , PSTN

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