1 year ago
#117603
networkdude
Estimating Ethernet line length
I'm trying to write a Network Visualization tool for HP/Aruba Switches and now confronted with the Question how to estimate the Length of a Connnection?
For Fibre Trancievers you can get some Info using
show interfaces transceiver <port> detail
This gives me this:
Transceiver in A22
Interface Index : 22
Type : SFP+LR
Model : J9151A
Connector Type : LC
Wavelength : 1310nm
Transfer Distance : 10.0km (9um),
Diagnostic Support : DOM
Serial Number : <bla>
Status
Temperature : 37.511C
Voltage : 3.2492V
Tx Bias : 36.514mA
Tx Power : 0.6053mW, -2.180dBm
Rx Power : 0.3652mW, -4.375dBm
Time Stamp : Mon Jan 31 09:23:12 2022
The Question is: Is it realistically possible to judge the Length of the line using the Tx/Rx Power Values? I know that the SNR on a line is dependant on all kind of factors (fibre quality, number of splices / connections on the way etc.) - but is it realistic to hit a somewhat crude estimate with those number?
Are there better tools to do this? Maybe some LLDP function?
kind regards
networking
switch-statement
aruba
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