NAC Inband RealIP-Gateway address

Hi Experts,
I want to configure NAC appliance in INBAND-CENTRAL DEPLOYMENT-REAL IP GATEWAY.
In this scenario, my clients are in different VLANs say 2 & 3. To all my clients the default gateway should be the IP Address of NAC. Correct?
Where I will configure this IP address in the NAC box so that this IP Address will be the default gateway for my clients.
I know that the "managed subnet" option in the NAS is for ARP resolution only and not this IP can be used as default gateway for Clients.
Do i have to create some virtual IP address in the NAC Ethernet card?
Please help me by sharing your thoughts
Sairam

Hi Sairam,
I put some configure samples about L2 IB for you:
interface GigabitEthernet1/33
description To Trusted
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 998
switchport trunk allowed vlan 31,40,110
switchport mode trunk
interface GigabitEthernet1/34
description To Untrusted
switchport
switchport trunk encapsulation dot1q
switchport trunk native vlan 999
switchport trunk allowed vlan 41,311,400
switchport mode trunk
There are some notes you should know:
1) NAC server -> core sw: trunking (see details on the above configuration)
2) Authen VLan: 311, 400 (these should NOT have SVI (Layer 3) interface anywhere on the network)
Access Vlan: 31, 40
You should map 311 -> 31, 400 -> 40 on NAC server.
3) CAS is going to be the default gateway for users
Hope this help!
NamNT

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