[j-nsp] TCAM full on EX8200?

Mark Tinka mtinka at globaltransit.net
Fri Oct 21 05:16:39 EDT 2011


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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