[j-nsp] 2.5 gig SFP modules?

Matthew Crocker mcrocker at crocker.com
Thu May 22 11:05:08 EDT 2008

Doesn't MRV sell a CDWM 'thingy' that will take two GigE links and  
combine them onto a single 2.5 gb Lambda?   You would still need to  
eat up to SFP ports on your routers but you would get 2 gbps over the  
same fiber pairs with EtherChannel bonding.

Note: 'thingy' is a highly technical term and should be used  

On May 21, 2008, at 6:18 PM, Richard A Steenbergen wrote:

> On Wed, May 21, 2008 at 04:05:28PM -0400, Chuck Anderson wrote:
>> Has anyone tried to use 2.5 gig SFP's with Juniper M-series as a drop
>> in replacement for regular 1 gig SFP's?  The goal is to be able to
>> have a 2.5 gig link between an M10i and an M120 over a regional
>> optical network.  Does this sort of thing work?
> If you put them into an OC48 card, sure. Multirate means the SFP  
> itself is
> capable of operating at multiple speeds (to support 1G/2G FC, OC48,  
> and
> its increasingly common to find new models that support 4G FC as  
> well).
> This doesn't make your 1GE card operate any faster, it just means  
> you can
> reuse that same SFP in an OC48 card (which helps lower costs).
> Of course it would be remarkably easy for Ethernet to be extended to
> support higher data speeds without any real change in the structure or
> encoding, just like FC has managed to go from 1G to 2G to 4G with  
> the same
> backwards compatible ports. Unfortunately the IEEE has its  
> collective head
> so far up its collective ass that nothing this useful will ever be
> standardized, but there are actuall some folks (like Broadcom) making
> non-standard "2.5 Gigabit Ethernet" products for certain  
> applications. :)
> -- 
> Richard A Steenbergen <ras at e-gerbil.net>       http://www.e-gerbil.net/ras
> GPG Key ID: 0xF8B12CBC (7535 7F59 8204 ED1F CC1C 53AF 4C41 5ECA F8B1  
> 2CBC)
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