[c-nsp] XFP, SFP+, ???

David Freedman david.freedman at uk.clara.net
Tue Oct 20 10:48:27 EDT 2009


> So, I am looking at doing DWDM for some mid-haul passive-splitter links
> around NYC metro - working with a carrier that's buying dark and
> offering to hand me lambdas off passive splitters.

Did you consider an "active" unit before you go running in vendor
"coloured pluggable" compatability issues (which technically should be
"few and far between" now cisco have pulled their finger out)

http://www.nanog.org/meetings/nanog42/presentations/pluggables.pdf
is a good presentation from nanog42 with regards to pluggables.

I see you have 6500, but you make no mention of 1G or 10G being your
requirement, if you meant 10G then I assume this means you are thinking
of WS-X6704/8 and in such case you can /technically/ get hold of
coloured xenpaks (I believe opnext manafacture these) but I would
personally not waste my money here.

If 1G, your options are more open, plenty of people manafacture coloured
SFPs which are cisco "compatible"

Dave.

Jeff Bacon wrote:
> So, I am looking at doing DWDM for some mid-haul passive-splitter links
> around NYC metro - working with a carrier that's buying dark and
> offering to hand me lambdas off passive splitters. 
> 
> I'm going to need to punch enough power to go 20-40km + losses in the
> passive splitters. 
> 
> Do I need to look at SXI + SIP-400 + SPA to go XFP? 
> Am I better off with a 6704 to get XENPAK even tho it's not the best
> board in the known universe? 
> Or do I go with X2 tuned optics? 
> 
> Effectively, what's the cheapest practical option, assuming I need no
> more than 4 ports per 6500 and don't have > 1 slot available? (I have
> physical space constraints, I mostly work with 03E and 04E chassis)
> 
> Thanks,
> -bacon
> 
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