Nat Overload with Multiple ISP's

In this video, we will be understanding how the Cisco IOS router handles Dual or more ISP of Internet links landing on your Cisco router.

[@jojo-nu9rl]

Heloo sir,.. please continue your fortigate videos .

[@doctor.networks]

Hello brother, Yes I'm trying to continue that. Hopefully i will. Thanks for letting me know 🙂

[@garygatten1154]

Good stuff, thanks. Same situation, only ISPs (Gi1 and Gi2 in your diagram) are each in a different VRF - Internet1 and Internet2. I've tried the config you demonstrated but it doesn't work, presumably because of the VRFs. (Gi0 / Inside is GRT). When I use a basic NAT statement as in a single ISP (no route-map), it works, but of course I must change the nat manually or use EEM triggered by IP SLA tracked object. So, what am I missing? Will this even work with VRF's? I have seen similar NAT use cases where it simply won't work when overloading an interface, must be a different IP - is this one of those cases? TIA!

[@doctor.networks]

Hi Gary, interesting scenario. Now rather then asking you a bunch of questions, I would request if you could send the running config of your router to [e-mail]. I will be happy to assist (No charges).

[@garygatten1154]

@@doctor.networks Stay tuned - coming your way.

[@shakeeljaved1753]

What if we configure Two ACLs with different names like INTERNET & INTERNET2 and then call them into two different statements of NAT, would that work?

[@doctor.networks]

If the outgoing Interface's are different it will definitely work, If the interface's are same, it will replace it with the latest nat statement you type.

[@abdulaziz-jn4yy]

how can the interface be same for two ISP? @@doctor.networks

[@madushalaksan8851]

please continue your fortigate videos

[@doctor.networks]

Will do soon InshAllah

[@09alexandr]

Hello, is there a way to have NATed traffic being balanced?

[@doctor.networks]

On cisco NO. You can do that on Fortigate by utilising the SDWan feature

[@garygatten1154]

PBR/PFR. Not truly balanced, that's impossible with two different ISPs, but you can direct traffic x on int1 and traffic y to int2. In route- map you set next hop based on your traffic matching.