TCP/IP host routing table get

This paper introduces the method of obtaining the route table of host in IP protocol:

1. Host Initialization routing table:

   • Direct-connected routing: Automatically obtains routing information for direct-attached hosts and networks when the interface is initialized
   • Indirect connected routes: Manually initialize the routing table by executing the route command
2. ICMP routing requests and advertisements

• • Host: ICMP requests are sent during boot, and ICMP advertisements from routers are normally listening for 30 minutes of the lifetime of the advertised routes
  • Router: listens for ICMP requests from the host and then sends ICMP advertisements, usually sending ICMP notices periodically (about 10 minutes)

TCP/IP host routing table get