nanog mailing list archives

Re: AW: Recommended 1Gb SFP for ~115km?


From: Will Hargrave <will () harg net>
Date: Tue, 10 Aug 2010 22:28:04 +0100


On 4 Aug 2010, at 17:58, Thomas Weible wrote:

Cisco did a quite good job on implementing the DDM characteristics of the optics. So why not to take a 32dB or even 
41dB power budget SFP and make it workable in the switch / router. Works like charm in some setups and you see 
straight the actual line.


Sadly not the case here.

OP is using a 6506, and the majority of the 67xx linecards released (which are the decent gige linecards for 6500) 
don't even support DDM/DOM at all. Only the very latest hardware revisions do. Sigh.

Other vendors refuse to report light levels from optics they didn't supply. This is just a bad-faith way round the 
RFP/tender clauses we've all been including for the past 5 years prohibiting vendor locking optics. Shame on them.


Will




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