Test SFP on Catalyst 3560

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Today I ran into a situation where a gigabit ethernet link went down
in a remote site.  on one end of the connection was a Catalyst 3560 w/
a GLC-SX-MM= SFP module connecting on the other end to a Catalst 2950
w/ a GBIC of some type.

The gig interface on both ends was showing down/down. I eventually had
to replace the GLC-SX-MM= SFP with a new one and the connection came
up immediatley.  My question is, is there a way to test/diagnose the
SFP modules from the CLI to determine if it is functioning properly or
not, rather than having to make a 200 mile round trip drive to analyze
this onsite?

Re: Test SFP on Catalyst 3560
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In short, no.  If you have someone there, and hopefully you have some
spare ports in the switch, you can move to different ports, or leave a
spare GBIC in a second slot for trial/error, but there is no official
way to test GBICs or SFPs in IOS/Catalyst software.

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