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

[james jones]

@Adam and @Mike What versions of Junos have you seen the limitations?

-James

On Sat, Oct 6, 2012 at 2:01 PM, Mark Tinka <mark.tinka at seacom.mu> wrote:

> On Wednesday, September 05, 2012 07:20:26 AM Oliver Boehmer
> (oboehmer) wrote:
>
> > 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.
>
> The OP is right, I have seen Juniper routers (both MX- and
> M-series) log error messages in certain scenarios,
> particularly if the stack was larger than 3 labels, if my
> memory is anything to go by. This was Junos 10.4R4.5.
>
> In my case, that log was on the back of an NG-MVPN
> deployment, and only participating routers logged the issue.
> That said, the log never resulted in any service issues. It
> appeared while were troubleshooting something else.
>
> Mark.
>
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