[c-nsp] switch with 2x 10GBASE-T interfaces

[Tom Lanyon]

On 02/10/2011, at 12:03 PM, Martin T wrote:
> In addition, as I checked the 4900 series as well, do built in X2
> ports(the ones in the chassis http://mcaf.ee/us1dt) in 4900M support
> "TwinGig Converter Module"? According to documentation they don't. Any
> experience with this?

Only the 8-port X2 half card (X4908 supports the TwinGig modules.  The OneX modules (X2 to SFP+) are supported in all X2 ports, even the built-in chassis ports.

A 4900M would meet your needs, but you'd have to configure as:

1x WS-X4908-10G-RJ45 (8x 10GBASE-T ports)
1x WS-X4908-10GE (8x X2 10Gb ports)
	+ 8x CVR-X2-SFP TwinGig converter
	+ 14x GLC-T (14x 1000BASE-T ports)

That would leave 2x SFP ports spare on the TwinGigs for your LX10 optics and all 8x X2 ports on the chassis free for other 10gig purposes.

It's a bit more expensive like this than making use of the WS-X4920-GB-RJ45 20 port 1000BASE-T card, though, which you could do if you didn't need the 2x LX10 SFPs.   Could you upgrade to 10GBASE-LR?  You could put 2x X2-10GB-LR adapters in the X2 chassis slots.

Tom