[j-nsp] 2.5 gig SFP modules?

Amos Rosenboim amos at oasis-tech.net
Thu May 22 11:31:36 EDT 2008

I actually used the MRV thingy for doing just that and it worked very  
It's actually a nice CWDM system.



On May 22, 2008, at 6:05 PM, Matthew Crocker wrote:

> 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
> sparingly...
> 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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