As shown, it is a link between R1 R2 PPP R1 R2 IP, and the direct interface is not connected to the same network segment, but can communicate with the straight interface, and the same rule
In the case where the Ethernet channel cannot communicate, what is the reason?
In the broadcast network OSPF RTA.RTB.RTC RTD DR 2. 1. 1 0 network, there are four routers in the same network segment, and its first priority is and
Router ID 192.168.1.1.192.168.2. respectively 1.192.168.3.1 192.168.4.1. 4 and if enabled on this router, OSPF is enabled.
The OSPF BDR is elected as
The router is enabled and the role of the router HW OSPF HW ABR, abr -surmnary, LSA ? is configured and then which classes are summarized