WS-5486-LX verses WS-5486-LX/LH

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Sep 9th, 2009
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We have a Cisco 7600 router with multiple GBIC modules.

Can you please confirm if there is a difference in a GBIC module marked as WS-G5486 1000BASE-LX and another marked as WS-G5486 1000BASE-LX/LH.


We have found that on one of our circuits, the LX cuases packet loss, but the LX/LH works fine.


The part numbers are the same and all the Cisco documentation we have suggests both modules are identical.

Can you please confirm.

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viyuan700 Wed, 09/09/2009 - 06:20
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"The Cisco 1000BASE-LX/LH GBIC (WS-G5486) fully complies with the IEEE 802.3z 1000BASE-LX standard. However, its higher optical quality allows it to reach 6.2 miles (10 kilometers) over single-mode fiber (SMF), compared with the 3.1 miles (5 km) specified in the standard."


This is the explanation from Cisco documentation. See the link


http://www.cisco.com/en/US/prod/collateral/modules/ps5455/ps6577/product_data_sheet09186a008014cb5e_ps872_Products_Data_Sheet.html


This is the link for standard where it has given that length specified by standard is 5Km for 1000BASE-LX (you have to accept the terms and condition to see the standard)


http://standards.ieee.org/getieee802/download/802.3-2008_section3.pdf


Do you have info that what is the distance between the 2 1000BASE-LX cards?


Is 1000BASE-LX/LH also have the same distance?

randomcamden Wed, 09/09/2009 - 06:49
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If you find the answer, I'd love to know. Sounds exactly like the issue I have ;o)

viyuan700 Wed, 09/09/2009 - 06:56
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Hi Neil Camden,


Do you have info like what type of card and distance between the cards?


If you tried some steps already to troubleshoot the problem.

randomcamden Wed, 09/09/2009 - 07:39
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I don't know what's the other end, or how far away it is... it's a carrier CE somewhere. I'm guessing from the symptoms that it's more than 550m away, which is why the LX GBIC doesn't work, but the LX/LH does.

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