[c-nsp] BGP Signalled VPLS

[Pshem Kowalczyk]

Hi,

ASR901 is based on a Broadcom chipset. It can do max of 3 labels.

kind regards
Pshem

On 10 August 2013 06:55, Saku Ytti <saku at ytti.fi> wrote:
> On (2013-08-09 18:24 +0300), Nitzan Tzelniker wrote:
>
>> regarding SR one thing that I thing is a problem with it is the number of
>> labels you can push on the smaller hardware platform (ASR901/Juniper ACX)
>> if you want to do a strict path you will have to push a lot of labels and
>> in these platforms you are limited.
>
> I wonder what the actual HW limitations are, ASR901 I think is CSCO
> internal, ACX is BCM.
>
> Is the documented mpls label stack depth limitation how many levels of
> abstraction you have (lookup VPN label in VRF table, then lookup IGP label
> in LDP/IGP, two lookups, two levels of abstraction, essentially two
> lookups).
> If this is the limit, then in explicit route case this limit might be
> exceeded by returning more than 1 label as rewrite information of single
> lookup, in explicit route, you'd know whole stack after one lookup, it
> would just return more data.
>
> IPv4 tunnel lookup returning 20B rewrite information might not be any
> different to lookup returning 5*4B labels.
> Or lookup result being IPv6 header might be analogous to returning 10
> labels.
>
> I however don't have any data, this is purely conjecture.
> --
>   ++ytti
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