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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Routes Selection
Hi, Given two routes similar in preference (BGP steps) where each is received from a different ISP (or technically speaking an AS). How do I as a network operator decide which one to install in the forwarding table? Here goes the list of options that i have: (a) I can install both the routes in my FIB and split the traffic. Packet reordering would not be a problem as most of the modern routers hash packets based on the fields carried in the IP header. Thus similar packets would flow in same direction. OAM can be a minor issue. But its not something that is impossible to sort out. People have been anyway doing it for IGPs. (b) I could select one route based on *some* policy. I would love to get an insight on what kind of policies people use to route traffic. Now, I use just one route. The other comes live into action when the primary or my first one goes down. I get redundancy but I lose bandwidth. To save bandwidth I could write policies/routemaps/etc to send some traffic over one link and the remaining over the other. But then this is static and does not guarantee an equal or a just split of traffic. Any help/comments on this would be highly appreciated. Regards, Abhishek V. -- Class of 2004 Institute of Technology, BHU Varanasi, India
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