Cisco NAC discovered host field use OOB L3 and L2 OOB

Hi all

We are in the phase of project initiation in a huge deployment of Cisco NAC.

Customer has of 8 regional offices who will be deployed in OOB L2 mode with its own servers of NAC.

Client also As 25 small offices who will be deployed in OOB L3 mode (using the access control list) with two central servers of the NAC.

NAC agent will be deployed at the Center through Microsoft Windows Domain Services on each computer in the domain. However, users could move from a small office to a regional office occasionally.

I was wondering how we should use the Host field discovered in the XML of the Agent?

My opinion is the definition of the scope of the host of the discovery to the IP address of the central servers of the NAC. This setting will be used when the user is in a small office and when in an office regional, the NAC in mode OOB L2 server will already intercept the traffic of the user and the IP address in the host discovery field won't matter in this case?

Am I wrong?
Any help much appreciated.

Dumlu

Hi Dumlu,

If your concern relates to users of L2, then this will work regardless of the address of the configured host discovery.

This is the case, the Agent will try the host address configured discovered on top of the default gateway address.

In L2, the NAC server is between the host and the default gateway, so the L2 discovery process will still work.

Consider that for users of L3, the discovery packet sent to the discovered host address just reach the server of the ANC, no matter if so the agent can reach this address; the point is to ensure that the NAC server receives this package in order to meet with the NAC server specific info.

I hope that answers your question.

Kind regards

Federico

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