On 02/10/2009 14:36, Jeff Fitzwater wrote:
Is there any issues with running UDLD with TX to Fiber converters at
each end of a gig cisco to cisco link? We are just over the distance
budget with the 10KM optics.
6500 TX port--- to fiber converter--- 18KM fiber--- to converter--- back
to TX port on 3750.
We are looking at the converters because the Cisco ZX optics are very
expensive and the converters with 30KM optics are much cheaper than the
60 KM ZX optics.
UDLD should be fine - it's just data packets, after all. So unless your
media converters are doing something very strange and very wrong, it will
be fine.
You may want to look at third party optics from reputable manufacturers
(e.g. http://www.finisar.com/optical_modules_2), although many
organisations have policies in place which work against using third party
components. Also, it is very easy to pick up grey optics with cisco serial
numbers on them, which means that the special command which we all know
about isn't necessary.
Also, bear in mind that not all c65k ports support reading DDM info from
SFPs. SUP720 cards will, as will later hardware revisions of the 6724sfp
blades. Earlier hardware revisions won't. Also, 12.2SX >= SXF9 will not
present DDM unless it sees a Cisco serial number.
Nick
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