Ethernet Switches & Routers

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Occasional Contributor
Posts: 10
Registered: ‎06-13-2008

Disable sfp to increase the life of the laser?

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?

Thanks.

Occasional Contributor
Posts: 14
Registered: ‎10-17-2004

Re: Disable sfp to increase the life of the laser?

Hi,

Does disabling the port actually switch off the laser???

I don't know to be honest (Haven't tested it) but I imagine they could stay powered on...

Fred

Super Contributor
Posts: 1,087
Registered: ‎12-13-2009

Re: Disable sfp to increase the life of the laser?

Hi all,

     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.

FastIron(config)#optical-monitor

To enable optical monitoring on a specific port, use the following command.

FastIron(config)#interface ethernet 1/1

FastIron(config-if-e10000-1/1)#optical-monitor

To enable optical monitoring on a range of ports, use the following command.

FastIron(config)#interface ethernet 1/1 to 1/2

FastIron(config-mif-e10000-1/1-1/2)#optical-monitor

Syntax: optical-monitor

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.

Thanks

Michael.

Occasional Contributor
Posts: 10
Registered: ‎06-13-2008

Re: Disable sfp to increase the life of the laser?

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.

Super Contributor
Posts: 1,087
Registered: ‎12-13-2009

Re: Disable sfp to increase the life of the laser?

Ho Scott,

      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.

thanks

Michael.

Occasional Contributor
Posts: 9
Registered: ‎10-17-2008

Re: Disable sfp to increase the life of the laser?

Doing a portdiable does turn off the transmitter.

N/A
Posts: 1
Registered: ‎06-17-2013

Re: Disable sfp to increase the life of the laser?

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.

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