[c-nsp] LX vs. LH GBICs

[Max Pierson]

1000BaseLX/LH interfaces are fully comply with the IEEE 802.3z
1000BaseLX standard. However, their higher optical quality allows them
to reach 10 km over single-mode fiber (SMF) versus the 5 km specified in
the standard. This is where the LH kicks in...which allows them to
achieve a longer distance when used with SMF.

-nmp


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Matt Stevens
Sent: Friday, March 21, 2008 1:28 PM
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] LX vs. LH GBICs

Does anyone know what Cisco GBICs will report their media type as LX, vs

LH when looking at a show interface in a Cat65k?

I'm trying to get a link up between some non-cisco gear and a provider -

the providers show interface is saying "media type is LX".

A show interface from a similar link to a different provider gives 
"media type is LX".

Cisco's just showing a single 1000Base-LX/LH GBIC in their docs, so I'm 
a little confused about where the different media types are coming from.
-- 
matt
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