Router Redundancy single ISP

[Mikecl]

Hi,
Hi

I have one ISP (with ADSL Backup) which provides a 10MB ethernet connection, I would like to provide router resilience , I was thinking of connecting a switch to the ISP connection and then connecting each of the 2 routers to the switch and run HSRP for the clients on the LAN. The question I have is what is the best way of ensuring that the returning traffic hits the correct router?, Is there a better/different way of making this work?


Thanks

 

[burtsbees]

PBR. But Having a L3 switch/router and then the 2 edge routers without HSRP, and PBR in the switch/router would likely be what you want, or floating static routes.. HSRP is like when one router goes down, the other comes up almost seamlessly. The thing with that is that all traffic goes to the same destination.

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tim@tim-laptop ~ $ sudo apt-get install windows
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package windows...Thank Goodness!

 

[brianinms]

Mike,

Then unless you have a redundant switch it defeats the purpose of having redundant routers.

 

[Mikecl]

Hi Guys,

Thanks for responding, I can add another switch without a problem, I thought running HSRP on the LAN side would mean no changes for the clients as the virtual IP address would be used, however the question I have relates to how the ISP router would choose or direct traffic to the correct (Active Router). I had a look @ PBR but I am not sure how that would work in this instance? Perhaps asking the ISP to set up floating statics or IP sla tracking?

Thanks

 

[brianinms]

Mike your best bet would be to run a dynamic routing protocol such as bgp with your provider. I will mention that most people who run HSRP on their outside routers will usually have connections to two different providers.