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Webcast-Catalyst9k
New Member

Multipal routing configration

I have a router 1801, adsl port configured with one ISP, and Fastethernet0 port is configured with another ISP provider. So I want to configured like if adsl (ISP) not working then traffic pass through fastethernet0 (ISP)

I made commands:

ip route 0.0.0.0 0.0.0.0 Dialer0
ip route 0.0.0.0 0.0.0.0 FastEthernet0 10

ip nat inside source list 1 interface Dialer0 overload
!        
access-list 1 remark INSIDE_IF=Vlan1
access-list 1 remark SDM_ACL Category=2
access-list 1 permit 192.168.2.0 0.0.0.255
dialer-list 1 protocol ip permit

But the traffic is not passing on Fastethernet0. Anyone can help me please. I also attached txt file

3 REPLIES
Cisco Employee

Re: Multipal routing configration

Hi,

You want to use adsl link as  the primary path and the ethernet0 as backup, correct? Base on your configuraion, I think your NAT configure might cause problem. When your primary adsl link fail, the dialer wont have IP anymore hence the PAT wont work.

HTH,
Lei Tian

New Member

Re: Multipal routing configration

So how can I correct the nat issue, Can explain please.

Hall of Fame Super Blue

Re: Multipal routing configration

nadeem704 wrote:

So how can I correct the nat issue, Can explain please.

Just add another NAT statement for fa0 ie.

ip nat inside source list 1 intefrace fa0 overload

Jon

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