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Beginner

X2-10GB-LR and receive power

Hi All.

We are having troubles getting a 10Gig interface to come up with a carrier... it shows down down.

We are using X2-10GB-LR on a 6500 and SM fiber, distance to carrier hand off is about 90 feet.

According to;

http://www.cisco.com/en/US/prod/collateral/modules/ps5455/ps6574/product_data_sheet0900aecd801f92aa_ps5251_Products_Data_Sheet.html

The receiver power on a X2-10GB-LRis

Max

0.5       

Min

-14.4

Our carrier is sending at +5db.

Currently the interface is down.

My question is; would the interface even come up if it is receiving a powerful signal?

Here is DOM output for our interface.

show interfaces transceiver detail

           Optical           High Alarm High Warn Low Warn   Low Alarm

           Transmit Power     Threshold   Threshold Threshold Threshold

Port       (dBm)             (dBm)       (dBm)     (dBm)     (dBm)

---------- ----------------- ---------- --------- --------- ---------

Te3/2       -1.5                 0.9         0.4       -8.2       -8.1

           Optical           High Alarm High Warn Low Warn   Low Alarm

           Receive Power     Threshold   Threshold Threshold Threshold

Port       (dBm)             (dBm)       (dBm)     (dBm)     (dBm)

---------- ----------------- ---------- --------- --------- ---------

Te3/2       -40.0                 0.9         0.4       -14.4     -15.0

Everyone's tags (4)
1 REPLY 1
Beginner

X2-10GB-LR and receive power

With fiber connections, remember there is a transmit strand and a receive strand. The first thing to do besides making sure the interface is no shut and the module is firmly seated, is to try crossing the pairs of your fiber. IE, take the "clip" off the end if necessary, and switch the "A" and "B", so that the one on the left is now on the right, and the one on the right is now on the left. (only on one end of the fiber strand)

My bet is that you have your transmit connecting to their transmit, and their receive to your receive. If you swap the connectors on one side, that may very well do it. If that doesn't work, I'd get a 2nd Xenpak if at all possible and connect them back to back with a "crossover" fiber as shown right above and make sure it links up that way. Could be a bad Xenpak.

Good luck!

Andy

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