Dynamic routing network infrastructure of linux

OSPF (Open Shorted Path First): is a dynamic routing link support VLSM (variable length transmission mask). The multicast mode used only performs multicasting when the link changes, and uses the cost to perform routing. All the links are formed into a database, and each route is determined by the shortest path algorithm. The convergence speed is fast and there is no limit on the number of hops. The 8th bit of the physical multicast MAC address is 1 for physical multicast. IP multicast is 224.0.0.5. The default hop count of OSPF is 110. The default hop count of RIP is 120RIP. The routing protocol is a simple routing protocol that uses hops to route. Use broadcast to send your own routing table, usually every 30s. Broadcast all of your routing information each time. RIPv1 does not support VLSM RIP v2 support. The convergence speed is slow. The SA indicates an autonomous system. A routing protocol is used in the autonomous system. The autonomous system divides the areas of different areas. Area is divided into backbone area and non-backbone area. The backbone area is numbered 0. Router_Id: The number of the router that uniquely identifies the OSPF area. You can choose whatever you want. OSPF configuration steps on the router: 1: Turn on the OSPF service on the router and enter the configure mode: router ospf process_id (indicating the process number of ospf in the router, you can choose whatever you want) 2: router_id 192.1.1.1 Specify the router in OSPF The only sign. Can be chosen casually, no practical significance. 3:network 192.168.10.0 0.0.0.255 area 0 Enable the OSPF routing protocol by the port network number of the router. note! Is the network number, not the IP address of the port. View routing information: 1: show ip route View routing table information. 2: show ip protocols View the neighbor list and its status. 3: show ospf view ospf configuration 4: show ip ospf interface type number to view the data structure ospf interface. 5: privileged mode: clear ip ospf process Clear all OSPF configuration