dot1x mac-auth-byass not supported on 2950 switches

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Mar 18th, 2008
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Hi all

I have 2950-24 and 2950SX-24 switches. I upgraded them to the Latest IOS version availlable on cisco site(12.1(22)EA11).

We deployed the mac authentication bypass technology in our organization. The problem is the commands (dot1x mac-auth-bypass) and (dot1x critical) are not supported in this version.

How can we solve this issue. I have many switches having this problem

I appreciate your quick response and thanks on advance.


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jafrazie Tue, 03/18/2008 - 20:36
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Neither of these features are supported on the 2950 platform.

Jagdeep Gambhir Wed, 03/19/2008 - 08:36
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MAC-Auth-Bypass" feature is not available on the Cat2950 Platform and will not be supported in future as well.

MAB was added in 12.1(22)EA9 on 2940.

2960 also support 802.1x MAB.



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jafrazie Wed, 03/19/2008 - 10:46
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Right. Catalyst 2940/60 and 2950 are different platforms and there are no plans to support MAB on the 2950.

mark.blanchfield Mon, 05/12/2008 - 07:47
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We had a similar problem and unfortunately had to configure port security instead of MAC Auth Bypass. This is very static in nature so it requires more administrative work but I could not find another option.


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