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New Member

Source based routing

hie guys

i have 2911 router connected 3 isp's i.e ISP1, ISP2 and ISP3

my task is i want my emails from machine to routed thru ISP3 who is on gig0/2 and has the least bandwith

the inside interface is 4port 10/100 NIC

New Member

Source based routing

I am really sorry to not have replied sooner - I guess I am used to the old Yahoo group where it emailed us when there was a question like this. You have probably already found the answer, but the way I would do this is with Policy Based Routing or PBR. Effectively you will use an access-list to define your interesting traffic, then you will use a route-map to match that ACL and set the next hop out of the appropriate interface. Finally you will apply this route-map to the interface that the traffic from the server will enter on, so you can source base route it out the appropriate interface.

Of course we are just barely scratching the surface with PBR! It can be used to route based on lots of different criteria, and it can do a lot more than just routing the traffc out of a specific interface. You can also integrate it with complementary technology such as IP SLA and so forth. Here are a few links for additional information:

Hope this helps,

Jason Bomar, CCIE #9316

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