Router active-active scenario

[vasuramnet]

Hi All,

We have 3845 Router which is using for only Internet connectivity with one ISP

Scenario:

ISP1 ----Cisco 3845----IPS-------- Cisco ASA5580-20-----Cisco 4510R-----2960

                                                                                                               -------------user

ISP 2 ----Cisco 3845----IPS-------- Cisco ASA5580-20-----Cisco 4510R-----2960

Now we have another 3845 Router, which also has Internet connectivity from another ISP

Now the issue is we would like to use both ISP in active/active scenario.

So what will be the solutions?

any config examples

sri

[Mahesh Gohil]

For your requirement need few more inputs or I can provide with different options.

> If you have your own portable assignment from internet registry it is easy to use both provider as active/active via. manipulation at your end.

      > Outgoing traffic is not guaranteed to go via. both provider if you are learning only default route from both provider unless you use PBR at your end.

     > For incoming traffic you can divide your ip pool into two parts and announce half/half to both provider..do not forget to annouce supernet to both provide with AS_path prepending (or metric).

> If you do not have your own public IP then in that case you will be having two different IP from both the provider and you may achieve some sort of balance of traffic between two provider...not exactly half/half

so what is required is answer to below questions

> Do you have your own IP from registry and in what format (/24,/23 or what ?) ?

> What your ISP is pumping to you (Full BGP table, Default route or provider owned routes)

REgards

Mahesh