01-12-2011 11:13 PM
I've got a bunch of MLXs and I am unable to get any readings for optical monitoring.
enabled 'optical-monitor' on the global level
enabled the same on individual interfaces (some accept it stating its enabled, some raise a warning about incompatible optic)
and for the sake of trying it,
issued 'no transceiver-type-check' on the interfaces in question (note; was not on previously and link is passing traffic just fine)
I'm using 'show optic 1'
I don't have any Foundry/Brocade optics but these optics do show readings when inserted into Cisco 3550's
Any ideas or suggestions?
01-13-2011 12:55 AM
SFP's have the optical monitoring built into the them. You can buy with or without the monitoring.
So if the ones you have to not support optical monitoring then turn it on the switch will do nothing. You must the SFP that support this feature.
Take one of the SFP out and get the part number, then google its specs - if you see no optical monitoring then that is that.
01-13-2011 01:03 PM
The SFP standard allows manufacturers to add extra features that are engineered to work only in a particular OEM's equipment.
This helps vendors get away with charging $4995 list for a CWDM SFP that I can buy for $166 from oemoptic.com. Nice margins, huh?
Your SFPs apparently are encoded to surrender their monitoring info to Cisco devices but not to Brocade/Foundry.
Nothing personal, just business. At least the basic functions work fine!
01-13-2011 01:54 PM
Make that their SFP's.... as I do not work for Brocade
From your responce "Your SFPs apparently are encoded to surrender their monitoring info to Cisco devices but not to Brocade/Foundry."
Are you saying you do have Foundry/Brocade SFP's? If so then the part code should end with a -OM. (e.g. E1MG-OM) is that the case?
And as for the margin, well you are correct.
01-13-2011 03:00 PM
Not to worry...I was referring to James' SFP's, not yours.
BTW, oemoptic claims that their Foundry-compatible CWDM SFPs actually do support Digital Optical Monitoring (DOM) in Brocade switches for $166. Not bad if true.
Also interesting to see Cisco's most common SFPs (GLC-SX-MM) listed in a Dec 2010 matrix as NOT supporting DOM. Wonder if any have DOM in that category of ordinary SFP.