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Route guest v-lan out of secondary ip on single WAN port of a Cisco 2921

Damian Albury
Beginner
Beginner

I am currently trying to route the guest v-lan through the ISP's second public IP. There are 2 public IP's in the same sub-net with the same gateway coming on a single cable to the wan port of the Cisco 2921. I am trying to show guest traffic as originating from the secondary IP. Can anyone point me to a way to accomplish this ?

1 Reply 1

Masoud Pourshabanian
Collaborator
Collaborator

Hello,

I supposed you are using NAT since you only have two public addresses. You can specify the Guest-vlan source in an access-list and create a pool with your secondry public address.

(This is only pseudo code)

access-list 1 permit 172.16.1.0 0.0.0.255 (your guest VLAN)

ip nat pool  [name] (your secondry IP) (your secondry IP)

Ip nat inside source 1 pool [name] overload

I hope I understood your question correctly.

Masoud

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