Wednesday, July 4, 2018

Is it truly impossible to accomplish ipv4 AF iBGP multipathing when you use a route reflector?

If, say, I was an ISP and wanted to implement iBGP multipathing for the global internet routing table, is my only option to put it into a VRF and give each edge router its own RD? Or is there another way to accomplish this? (other than a full-mesh of iBGP, that is).

And if there is no other way to accomplish this, why isn't "Internet in a VRF" a more popular design? Are there any drawbacks? I've heard it can cause an increase to memory usage, but surely that is not such a problem with modern carrier-grade routing platforms... right?



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