http://www.tallsoft.com/cdpmonitor.htm
Cisco CDP Monitor is a CDP agent for windows host, With it you can know
the connective Cisco device, and you can know all the connective
computers by execute the command of "Show cdp neighbour" in Cisco
network devices. So the LAN Management Solution and the Routed WAN Management Solution of CiscoWorks 2000 Campus Manager can get these information and show the total topology of your network in graphics mode, not only the Cisco network devices, but also your PC and host. You can monitor windows host in Cisco's Network Management software.