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ACS with Dynamic VLAN which protocol to use ??


Which Protocol do I need to use, for providing dynamic VLAN to my desktop machines?

As in ACS 4.0 if I use local database of ACS then users successfully get the dynamic VLAN & as soon I use AD database while integration it with ACS ,the authentication fails!!

Please help.


Re: ACS with Dynamic VLAN which protocol to use ??


What is the error message you are getting on acs failed attempts ? It seems to be a group mapping issue.

You need to use Radius IETF/MS-Chap v2.


New Member

Re: ACS with Dynamic VLAN which protocol to use ??


Thanks for the reply. I am using EAP-MD5.

However, the problem is if I am using ACS solution Engine local database, users are getting dynamic VLAN after authentication.

But when I use AD as user database, the authentication fails. Even strange thing is that if I use AD database to log in to any Cisco Router then the authentication is working fine.

Even I am struggling with TAC also from last week in two different cases! However, they are unable to help! I found TAC has limited resource for ACS.

So please suggest what to do as on Cisco site, I found lots of stuff for Wireless but I have only the desktops (no wireless).

So will the mention below URL be of any help?

Thanks in advance


Re: ACS with Dynamic VLAN which protocol to use ??

Hi Vijay,

EAP-MD-5 is not supported with AD. Check out this link,

Also let me know if you have any other issues with ACS. I don't think TAC has limited resorces on ACS.


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