urgent-NAC OOB VG Deplyment

Unanswered Question
Sep 20th, 2010

hi all,
         Iam in the middle of design of NAC OOB Virtual Gateway.

I have the following doubts regading the placement of NAC Server to my existing Network

I have two Core ( redundancy -HSRP ) running VTP & 25 Edge Switches ( VTP Client )

According to CISCO , we can place NAC Server either in the Core or distribution Switches only , not on the edge switches, in OOB Virtual Gateway deployment.

But currently my existing core switches is not having copper connectivity, customer don't want to invest on core switches.

so I have to forcefully move the NAC server to one of the EDge Switches with both interfaces ( trusted & untrusted ) connected to same Edge switch, but CISCO is not recommending to do so in NAC OOB VG Deployment.

I need to know why we cannot place NAC server at one of the Edge Switches. ( NAC OOB VG Deployment ) , what are the issues behind that ?

One more thing is that , as my Network is running VTP , what are the things to be consider during the design of NAC OOB VG Deplyment.

Iam attaching the Network Diagram, Please go through that.

Expecting your valuable suggestions.



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Faisal Sehbai Mon, 09/20/2010 - 07:13


You can put them on the edges, but you have to make sure you extend all the VLANs necessary to that edge. It's just bad design, but I don't see why it won't work.

Unfortunately you don't have enough details in the map you provided to get a more detailed answer :-)



pranavam_dileep Mon, 09/20/2010 - 07:34

hi faisal,

I know its a bad design, but the Problem I mentioned , Core don't have any ethernet Port , & I can't also put GBIC Copper module.

Can you please brief me why putting the NAC server at the edge switch is not a good design.



Faisal Sehbai Mon, 09/20/2010 - 11:44


Primarily because it makes things more complex and more places for errors to happen. If you think you have control over all the details and can extend your VLANs to the edge without problems, then by all means go for it!




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