Nick Hilliard wrote:
On 02/10/2009 15:24, Zoe O'Connell wrote:
It's worth noting that while the restriction on optics in general is
just annoying, the DOM restrictions do seem to be there for a reason: I
have a number of non-Cisco optics reporting DOM data that's obviously
incorrect, so I don't trust anything that's non-Cisco. Sadly, on
platforms where it will show you DOM from any SFP, there's no obvious
indication if it's a Cisco or third party optic.
"show idprom interface gig x/y" should give you a pretty good idea of
what's plugged into the box (on a 65k).
Yes, there are very poor quality transceivers out there. Cisco appears
to re-sell Finisar and Opnext, which would suggest that these
companies produce good quality kit.
I'm personally not convinced that restricting equipment to use
own-brand transceivers does much more than create a lucrative grey
market for sophisticated knock-offs. I've also heard the incorrect
DOM readings line being trotted out before, but I'm not convinced by
it: if you buy cheap-ass equipment, you should expect high mileage
variation.
FWIW:
I have a great many Cisco SFPs sourced via Dimension Data (at
ridiculously over-inflated cost, of course).
I get varying degrees of bullshit back as DOM readings from quite a few
of them.
Sounds like more FUD to me.
adam.
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