[c-nsp] NCS-5001 - MPLS L3VPN Issue

Adam Vitkovsky Adam.Vitkovsky at gamma.co.uk
Sat Mar 5 16:06:37 EST 2016

Hi folks,

> Mikael Abrahamsson
> Sent: Friday, March 04, 2016 4:52 PM
> To: Mark Tinka
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] NCS-5001 - MPLS L3VPN Issue
> On Wed, 2 Mar 2016, Mark Tinka wrote:
> > But aren't the fabric chassis' in multi-chassis deployments for the
> > CRS all optics-based?
> Yes, but I believe the discussion was around optical backplanes within a
> device, not between devices.
> Compass EOS is the only player I am aware of that does optical within a
> chassi.
> It seems there were copper advancements in the meantime that made
> copper still scale well for backplane connectivity, and that's why existing
> vendors have kept using copper traces switch fabric connectivity instead of
> going optical.
Just would like to understand what you folks mean,
Do you mean all-optical packet switching, i.e. no OEO but all optical switching with granularity down to Packet(Cell) level?
So these things are real/in-production nowadays?
Would love to know how do they do that -some ROADMs in a Benes/Clos crossbar? But they would need to be really tightly timed so they can switch down to cell level?


        Adam Vitkovsky
        IP Engineer

T:      0333 006 5936
E:      Adam.Vitkovsky at gamma.co.uk
W:      www.gamma.co.uk

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