[c-nsp] is a DWDM SFP a DWDM SFP?

Justin Shore justin at justinshore.com
Wed Nov 25 10:53:39 EST 2009


Scott McGrath wrote:
> Or Cisco could do something RADICAL and actually support the industry 
> standard optics model like they USED to
> for GBIC's    

I can understand their position on 3rd-party optics not meeting spec and 
not inter-opting well.  I've seen that many times myself on 3rd-party 
optics.  Sure there are standards but not everyone reads the standards 
in the same way and there isn't a CableLabs-like standards body to 
certify compatibility of optics that I know of.  Still Cicso could pick 
a major vendor or two like Finisar or Champion and partner with them to 
produce 3rd-party optics that they'll allow in their chassis without the 
hack workarounds.  Cisco doesn't make all the optics that I need.  I 
need really long single strand optics and Cisco stops at 10k.  I need 
20k, 40k, and 80k at a minimum.  I understand that those optics wouldn't 
be a huge seller for Cisco but at the very least they could partner with 
companies that make the optics that Cisco doesn't.  By not doing this 
SPs are forced to cobble together workarounds using media converters or 
budget optic transport gear.  Or pick another vendor that doesn't have a 
problem with 3rd-party optics and/or makes optics in the lengths SPs need.

> Otherwise what is the point of a standardized PHY - which ALL other 
> vendors support,   We might as well
> go back to the days of Cabletron MIM's and their ilk.

Well, not all other vendors support 3rd-party optics.  Fujitsu doesn't. 
  During an RFP Tellabs told us that they don't.  I've been told that 
Juniper is the same way.

Cabletron.  Now that brings back memories...from this past weekend 
trying to clean out my garage.  Anyone want a good deal on some 
2E42-27Rs?  :-)

Justin





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