The Network Monitor (the part of NetSight that scans the network and finds the links) relies on several Discovery protocols to resolve which port is connected to which port.
It can use MIB tables for CDP (Exteme, Enterasys, Cabletron Proprietary), EDP, and LLDP protocols to resolve port connections.
In addition, it relies on traps (for EDP and LLDP) sent by the devices to inform it when this data changes.
Therefore, how well Maps can find network links depends on:
- Whether or not the devices support the Discovery protocols
- Whether those protocols are enabled on the devices and their neighbors
- How well the device implements the Discovery protocol MIBs
- They have the related traps enabled for those protocols
- NetSight is configured as a trap receiver on those devices.
- NetSight has sufficient read access to the devices