[c-nsp] Devil's Advocate - Segment Routing, Why?

[Robert Raszuk]

But talking about commodity isn't this mainly Broadcom ? And is there
single chip there which does not support line rate IP ? Or is there any
chip which supports MPLS and cost less then IP/MPLS one ?

On Fri, Jun 19, 2020 at 1:22 PM Benny Lyne Amorsen via cisco-nsp <
cisco-nsp at puck.nether.net> wrote:

>
>
>
> ---------- Forwarded message ----------
> From: Benny Lyne Amorsen <benny+usenet at amorsen.dk>
> To: cisco-nsp at puck.nether.net
> Cc:
> Bcc:
> Date: Fri, 19 Jun 2020 13:12:06 +0200
> Subject: Re: [c-nsp] Devil's Advocate - Segment Routing, Why?
> Saku Ytti <saku at ytti.fi> writes:
>
> > This is simply not fundamentally true, it may be true due to market
> > perversion. But give student homework to design label switching chip
> > and IPv6 switching chip, and you'll use less silicon for the label
> > switching chip. And of course you spend less overhead on the tunnel.
>
> What you say is obviously true.
>
> However, no one AFAIK makes an MPLS switch at prices comparable to basic
> layer 3 IPv6 switches. You can argue that it is a market failure as much
> as you want, but I can only buy what is on the market. According to the
> market, MPLS is strictly Service Provider, with the accompanying Service
> Provider markup (and then ridiculous discounts to make the prices seem
> reasonable). Enterprise and datacenter are not generally using MPLS, and
> I can only look on in envy at the prices of their equipment.
>
> There is room for a startup to rethink the service provider market by
> using commodity enterprise equipment. Right now that means dumping MPLS,
> since that is only available (if at all) at the most expensive license
> level. Meanwhile you can get get low-scale BGPv6 and line-speed GRE with
> commodity hardware without extra licenses.
>
> I am not saying that it will be easy to manage such a network, the
> tooling for MPLS is vastly superior. I am merely saying that with just a
> simple IPv6-to-the-edge network you can deliver similar services to an
> MPLS-to-the-edge network at lower cost, if you can figure out how to
> build the tooling.
>
> Per-packet overhead is hefty. Is that a problem today?
>
>
>
>
> ---------- Forwarded message ----------
> From: Benny Lyne Amorsen via cisco-nsp <cisco-nsp at puck.nether.net>
> To: cisco-nsp at puck.nether.net
> Cc:
> Bcc:
> Date: Fri, 19 Jun 2020 13:12:06 +0200
> Subject: Re: [c-nsp] Devil's Advocate - Segment Routing, Why?
> _______________________________________________
> cisco-nsp mailing list  cisco-nsp at puck.nether.net
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>