On Thursday, October 20, 2011 10:32:02 PM Pavel Lunin wrote: > I meant that in order to do LB on labels alone (to have > enough of hash-keys for micro-flows), you need a large > enough set of labels in the core and more or less > uniformly distributed traffic over these labels. If you > have, say, 10 PoPs and 90 core tunnels, it's very > probable that 20% of them carry 80% of traffic. But > label-based hash will share labels 50:50. This is why > label alone is not sufficient for limited set of LSPs > and you need to construct hashes with more parameters > from payload.
Seems like a problem that can be solved with the so-called Entropy Label: http://tools.ietf.org/html/draft-ietf-mpls-entropy-label-00 Cheers, Mark.
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