Beginning several days ago both links began flapping every 5 and a half
hours, both links have this happen within a couple of minutes of each
other.
They will flap for several minutes and then return to normal operation
requiring no user action and the ports never enter err-disable or show
any other symptoms.
Your story popped me up a distant memory of a heating system that
happened to leak steam on a fiber cable. That cable contained all the 4
fibers of a presumed redundant connection.
I would not let the next predicted flapping time pass without:
* "show interface transc det" when everything works, and when things go bad
* technicians at both ends ready to disconnect one line and test the
loss on the fibers with appropriate instruments, in the first window
(~850 nm)
* physical inspection of the fiber run, if feasible
If the fibers turn out to be OK, when you have a Cisco 6509 on one end
and a Netgear on the other, and you need to try to replace one of them,
we all know where to start.
Regards,
Bergonz
--
Ing. Michele Bergonzoni - Laboratori Guglielmo Marconi S.p.a.
Phone:+39-051-6781926 e-mail: [email protected]
alt.advanced.networks.design.configure.operate
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