09-09-2011 05:37 AM
I am thinking of persistently disabling the unused ports on our FC 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. My thinking is that disabling the SFP will shutdown the laser.
09-10-2011 08:33 AM
disabling FC ports will increase the security of your SAN because you have control over what is where connected. Good if you have an security audit.
I don''t think that this will increase the laser life time becuase disabling a port is doing it on a logical level and not by shuting down the laser.
You can see on a disabled or persistent disabled port if something is connected and if the port is in sync but only if it is connected correctly ;-)
This means the laser and receiver are still working.
To disable the ports has one disadvantage: If someone swap sfps on disabled ports this will not correctly updated in the switch,
The differrence between portcfgpersistentdisable and a portdisable is that the ports will stay disabled after a switch boot or card power cycle.
I do a portcfgpersistentdisable on all unused port since years.
I hope this helps,