Stephane,

This has NOTHING TO DO with IPv6. I am not even sure based on what you draw
such strange conclusion ....

I am talking pure about MPLS data plane (even without any IP above) and how
we can solve the load balancing problems.

At min I expect for any discussion to be valid to discuss and compare all
options.

Note also that SPRING does not use LDP so I am much less interested in
solving the LDP load balancing issues.

Rgs,
R.



On Thu, Jul 24, 2014 at 6:46 PM, <stephane.litkow...@orange.com> wrote:

>  Robert,
>
>
>
> Talking MPLS, I don’t see a way to use MPLS label “prefix” … this is a
> discussion we already had together. I think you are trying to sell IPv6 SR
> that I will unfortunately not buy again J
>
>
>
> *From:* spring [mailto:spring-boun...@ietf.org] *On Behalf Of *Robert
> Raszuk
> *Sent:* Thursday, July 24, 2014 08:48
> *To:* Kireeti Kompella
> *Cc:* m...@ietf.org; spring@ietf.org;
> draft-kini-mpls-spring-entropy-la...@tools.ietf.org
> *Subject:* Re: [spring] SPRING MPLS and Entropy Label
>
>
>
> Hi Kireeti,
>
> I quite disagree about the more state argument.
>
> If you treat mpls label as prefix with mask which is all this boils down
> to there is no more state either in data or control plane.
>
> As to the point of not perfect load balancing it all depends on your hash
> function. If you always advertise at least as big block as you have max
> parallel links on any interface you should be fine.
>
> Best ,
> R.
>
> On Jul 24, 2014 2:12 PM, "Kireeti Kompella" <kire...@juniper.net> wrote:
>
> Hi Robert,
>
>
>
> On Jul 24, 2014, at 03:21 , Robert Raszuk <rob...@raszuk.net> wrote:
>
>
>
>  Therefor an alternative of using any form of entropy labels in data
> plane all together would be to allocate a SID blocks (say 64 or 128 wide)
> and allow SPRING header imposition to use such pools of SIDs per group of
> flows to effectively allow for efficient load balancing in the network.
>
>
>
> We’re rehashing (pun unintended) the entropy label discussion.
>
>
>
> Before we settled on entropy labels the way we did, we discussed
> advertising label blocks in LDP.  There are two problems:
>
> a) as Stephane mentions, ELs are stateless, but pools of SIDs impose more
> state in the forwarding plane (and to some extent, in the control plane).
>
> b) if you use small blocks, you get uneven load balancing; if you use
> large blocks, you blow up the state more.
>
>
>
> Kireeti
>
>
>
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