Configure OSPF to introduce autonomous system external routing
Configure OSPF to introduce autonomous system external routing
Networking requirements
All switches run OSPF, and the whole autonomous system is divided into three areas.
Where Switch An and Switch B act as ABR to forward routes between areas.
On Switch C, it is configured to introduce external routes (static routes) for ASBR, and routing information can be correctly propagated within AS.
two。 Configuration step
(1) configure the IP address of each interface
SwitchA
SwitchB
SwitchC
SwitchD
(2) configure OSPF, such as SwitchA
(3) configure external routing to introduce autonomous system
3. Verify settin
(1) View the ABR/ASBR information of Switch D
(2) View the OSPF routing table of Switch D
Note that in this example 3.1.2.1 is not real, it is just a routing entry
