[c-nsp] ASR 9000 Series MPLS Label Limits

Lukas Tribus luky-37 at hotmail.com
Sat Jul 9 12:37:31 EDT 2016

Hi James,

there are only 1M labels, because its a 20-bit value. This is a protocol limitation, you cannot go further with MPLS.

Means you cannot and should not assign a label per global ipv4 prefix, because you are going to run out of labels eventually. Use per-vrf or per-ce label instead.

Trident scales to 256k labels, all further generations scale up to the protocol limit 1M [1].



[1] http://d2zmdbbm9feqrf.cloudfront.net/2013/usa/pdf/BRKSPG-2904.pdf

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