What happens on the network when I select the Routers option on the Discovery Wizard – Discovery Type page?
AutoDiscovery starts the router discovery process by collecting data from the first router’s route table. A route table is used to determine other routers known by that router. If you entered a specific router’s IP address on the Discovery Wizard – Specify the Starting Router page, AutoDiscovery looks in that router’s route table. Otherwise, AutoDiscovery starts by reading the default gateway router’s route table. AutoDiscovery sends a SNMP message containing a GetNextRequest to read a router’s route table; the SNMP object referring to the route table is ipRouteTable. For more information, see RFC 1213, Management Information Base for Network Management of TCP/IP-based internets: MIB-II, available from the IETF website at http://www.ietf.org/rfc/rfc1213.txt?number=1213. Each reply to the GetNextRequest includes an ipRouteNextHop value, typically the IP address of another router on the network. For each new IP address returned as the ipRouteNextHop value, a new router is discovered. Eac
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