[c-nsp] NAt issue - two isp connections, need to nat 2nd isp for two dest addresses only

Dikkema, Michael (Business Technology) MDikkema at postmedia.com
Thu Apr 18 09:40:47 EDT 2013

I think you can use route maps with NAT to do this.

Ip nat inside source route-map voice int X overload
Ip nat inside source route-map notvoice int Y overload

Configure the route-maps to match on ACLs for the voice / not voice as needed.

Make sure you route those 2 IPs to the proper gateway as well.

-----Original Message-----
From: cisco-nsp [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of false
Sent: Thursday, April 18, 2013 8:12 AM
To: cisco mailing list
Subject: [c-nsp] NAt issue - two isp connections, need to nat 2nd isp for two dest addresses only

I have a generic nat overload statement that nats all my internal (192.168.1.x) traffic outbound. Works fine. I just added a second dedicated isp connection for voip traffic only and I need to have traffic destined for the two provider voip servers use the second/new ISP connection and perform nat using the public ip address of this new isp connection.

ex: -> use isp1 connection with nat outside and nat inside statements using standard nat overload command, except:

anything destined for and must use the second isp connection and nat accordingly.

How do I accomplish this? Could someone provide a config snippet? Any help would be greatly appreciated.

Thank you,

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