Ok. It is true if you want to set your IP blocks to go over RT4 or RT1 to a specific AS or IP block. But as i understand Local Preference is not suitable for source based (not destination) routing. Let me put this way; In RT1 i have two IP blocks, 10.1.x.x and 10.2.x.x. I just want 10.1.x.x go thru ISP1 and 10.2.x.x thru ISP2 for all outdomains. Without using route-map in all routers how can i set this? i can set incoming from ISPs by advertising 10.1.x.x to only ISP1 and 10.2.x.x to ISP2. what about outgoing??
If I do this i need to give the ip address of RT2 in route-map, right? and i need to write this route map in every hop, which is hard to implement for me because one of the router in my path, i.e. RT3 has low resources like cpu,memory, thats' why i just ask are there any other methods that are low resource consuming:)
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