[c-nsp] Local-switching on DFC's?

[Saku Ytti]

On (2006-09-27 10:18 -0700), Kevin Graham wrote:

> I had been under the impression that DFC's hairpinned traffic off the
> fabric interfaces for local traffic and were still constrained by fabric
> speed for forwarding (ie. between two ports on the same module still eats
> fabric bandwidth for that module).

I believe local switching is supported even without DFC if traffic
stays within same fabric channel. Of course lookups are still
done by the PFC in supervisor.

> Reading some of the press on the 6708 (Cisco's press release doesn't
> have much detail), there's mention that it handle 64gb/s locally:
> 
>   http://www.networkworld.com/news/2006/092506cisco10g.html?zb&rc=lan
> 
> Has this always been the case, or is this something new to the DFC3C?

I don't think this is anything new in DFC3C.

-- 
  ++ytti