Assigning nat inside source list nat-overload to another interface

[alee0786]

Hi all! 

We have NAT Overload setup on Cisco 887 router as follows:

ip nat inside source list nat-overload interface Dialer1 overload 

ip nat inside source static tcp 10.10.27.1 443 interface Dialer1 443

ip route 0.0.0.0 0.0.0.0 Dialer1

ip route 172.17.99.0 255.255.255.0 172.17.44.54

ip route vrf PRISMA 0.0.0.0 0.0.0.0 172.89.32.11

ip route vrf PRISMA 172.89.34.78 255.255.255.255 Tunnel457

The interface is now changed to Vlan2 instead of Dialer1. Also a new static route (0.0.0.0 0.0.0.0 dhcp) would be entered. What is the best way to update the NAT Overload setup? 

[balaji.bandi]

Try Route :

ip route 0.0.0.0 0.0.0.0 dhcp

change dialer to vlanX that should work for you.

Test and advise any issue

[Georg Pauwen · Accepted solution]

Hello,

first of all (obviously) change

nat-overload

access list to reflect the new IP subnet of Vlan 2.

Then, I would follow the sequence below:

887#clear ip nat translation *
887#conf t
887(config)#interface Dialer 1
887(config-if)#no ip nat outside
887(config-if)#exit
887(config)#no ip nat inside source list nat-overload interface Dialer1 overload 
887(config)#no ip nat inside source static tcp 10.10.27.1 443 interface Dialer1 443
887(config)#no ip route 0.0.0.0 0.0.0.0 Dialer1
887(config)#interface Vlan 2
887(config-if)#ip nat outside
887(config-if)#exit
887(config)#ip nat inside source list nat-overload interface Vlan2 overload 
887(config)#ip nat inside source static tcp 10.10.27.1 443 interface Vlan2 443
887(config)#ip route 0.0.0.0 0.0.0.0 dhcp

[alee0786]

Hi Georg, 

I was able to follow the above configuration and make the change from interface Dialer1 to interface Vlan2. 

Thank you!