OSPF is defined on a Frame Relay interface providing point-to-multipoint connections. The remote neighbors can reach this central site, but are complaining of routing failures between each of the remote sites. The central
router has all the routes for each remote site. Based on this information, what can be diagnosed as the biggest potential problem?
Why is it important to leave some residual dispersion at an amplifier site when 10Gb/s signals in a DWDM system have gone through a dispersion compensating device?