[c-nsp] mpls label stack limit ???

[Waris Sagheer (waris)]

ASR903, ME3800X, ME3600X & ME3600X-24CX can support 5 labels PUSH and 3 labels POP.
Unified MPLS can use up to 4 labels. L3VPN, LDP with TE/FRR in the core can also use up to 4 labels.

Best Regards,

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Waris Sagheer
Technical Marketing Manager
Service Provider Access Group
waris at cisco.com<mailto:waris at cisco.com>
Phone: +1 408 853 6682
Mobile: +1 408 835 1389

CCIE - 19901


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From: "Oliver Boehmer (oboehmer)" <oboehmer at cisco.com<mailto:oboehmer at cisco.com>>
Date: Tuesday, September 4, 2012 9:20 PM
To: Pete Lumbis <alumbis at gmail.com<mailto:alumbis at gmail.com>>, adam vitkovsky <adam.vitkovsky at swan.sk<mailto:adam.vitkovsky at swan.sk>>
Cc: "cisco-nsp at puck.nether.net<mailto:cisco-nsp at puck.nether.net>" <cisco-nsp at puck.nether.net<mailto:cisco-nsp at puck.nether.net>>
Subject: Re: [c-nsp] mpls label stack limit ???

There is a limit how far an LSR can peek into the frame for loadsharing
hash decisions (I recall 10 labels deep on the CRS). Other than that, the
MTU is the limit.

CRS can push a max of 7 labels onto the stack, ASR9k does 6.. Don't think
there is any use-case (yet?) that would need to push that many labels.

oli

On 04/09/2012 15:45, "Pete Lumbis" <alumbis at gmail.com<mailto:alumbis at gmail.com>> wrote:

If you are just talking about stack size, I think your only limit is MTU.

If you are talking about the number of label that can be operated on,
on a single device, that is going to be a limit of the
platform/forwarding engine.

-Pete

On Tue, Sep 4, 2012 at 8:01 AM, Adam Vitkovsky <adam.vitkovsky at swan.sk<mailto:adam.vitkovsky at swan.sk>>
wrote:
Is there an upper limit on the number of labels in the label stack on
Cisco
boxes please? Specifically ASRs and CRSs
It appears there's a limit of on Juniper

Thanks

adam

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