You can use the one which goes till 40Km
1000BASE-BX40-D and 1000BASE-BX40-U for Single-Fiber Bidirectional Applications
The Cisco GLC-BX40-D-I, GLC-BX40-DA-I, and GLC-BX40-U-I SFPs operate on a single strand of standard SMF.
A GLC-BX40-D-I or GLC-B...
"Wrong answer. Viewer beware. IP over DWDM is the best solution."
Maybe you would have give this verdict 7 years back you would have made billions of $. Even in IP over DWDM they added electronics to take different type of signal/speed and give you o...
Too much loss in 2Km of fiber. First check fiber if you have more than a pair in the same cable then try other fibers. If fiber is fine then check SFP.
Hi Sachin,Please check the link below and had the solution. As per them you need to set Baud Rate to 1200. https://supportforums.cisco.com/discussion/11593861/cisco-2600-router-confreg-1242