09-02-2011 07:53 AM
I am thinking of persistently disabling the ports on our switches to extend the life of the sfp's. Does disabling a port on a switch increase the life of the sfp or does this have no impact on extending the life of the sfp laser?
09-02-2011 03:52 PM
I have no idea if disabling th eport will turn off the laser. However if you have optical monitoring SFP's they we can do a simple test that may tell us.
Enabling digital optical monitoring
To enable optical monitoring on all Brocade-qualified optics installed in the device, use the following command.
To enable optical monitoring on a specific port, use the following command.
FastIron(config)#interface ethernet 1/1
To enable optical monitoring on a range of ports, use the following command.
FastIron(config)#interface ethernet 1/1 to 1/2
Use the no form of the command to disable digital optical monitoring.
After you have enable it, then view the results.
Viewing optical monitoring information
You can view temperature and power information for qualified XFPs and SFPs installed in a FastIron device.
Use the Show optic port-number command to view information about an XFP or SFP installed in a particular port. The following shows example output.
FastIron#show optic 13
Port Temperature Tx Power Rx Power Tx Bias Current
13 33.2968 C -005.4075 dBm -007.4328 dBm 6.306 mA
Normal Normal Normal Normal
Then disable the port, and check the results of the show optic command again.
09-08-2011 04:23 AM
I am sorry that I did not mention that my question concerns FC switches - 5100's, 48000'a. However, your in-depth answer did point me in a direction to go with the FC switches. Maybe the sfpshow command under FOS will provide some information. Thanks again for taking timeout to try and answer my question.
09-08-2011 04:32 AM
For the FC switches you should post in the Data Center SAN forum. You will get the right answer their from most likely TechHelp24.
Sorry I do not know the SAN side of Brocade very well.
06-17-2013 12:45 PM
We are interested in this as well and will give this a bit of an experiment.
Also, in testing, there are cases where one may want to simulate a disconnect or cable failure by programmatically disabling the laser.
It would be nice if this was crystal clear, but experimentation will help clarify.