I've tried unsuccessfully twice to cut our ATT Internet link over to our new 4451 router with GLC-LH-SM terminating the connection.
The existing router is a 7206 with a 1000 base-LX GBIC transceiver.
The local loop is via a Verizon Fujitsu Flashwave 4100 with FC9681EGX1-I04 Ethernet card (HECI code sbuiab8aad)
There are no problems with the 7206 GBIC talking to the flashwave.
When I move it to the 4451 GLC-LH-SM there is no recognition of a signal.
As a test, I connected the 4451 GLC to another one in a nexus optical ethernet card and it came right up. I even configured L3 addresses
and was able to ping and ssh to the 4451.
So I made a second attempt with the ATT link. I changed the GLC in the 4451. Same result.
I next checked the receive/transmit levels:
GLC tx: 5.2dBm
GLC rx: 5.8dBm (from fujitsu)
These levels are acceptable according to the GLC specs. (ref: http://www.cisco.com/c/en/us/td/docs/switches/metro/me6500/hardware/installation/guide/hig/0Bxcvrs.pdf)
The jumpers between the fujitsu and the 4451 have been verified and the length is about 18m.
Any insight to a solution is appreciated.
