3 Replies Latest reply: Oct 18, 2015 3:44 AM by sarah RSS

    OSPF attempt state

    Anil

      This state is only valid for manually configured neighbors in an NBMA environment

      can anyone explain the term manually configured nieghbor...???

      how neighbors are configured manually...??? means is there any other process to configure the neighbor manually...

       

      explain this??


      Thanks & Regards

      Anil

         
        • 1. Re: OSPF attempt state
          sarah

          The hello's sent over an NBMA network are unicast hello's unlike the broadcast or P2P network type  So when unicast hello's are being sent, the router needs to know the IP address of the other router. That's why you configure a neighbor statement in the NBMA environment, as opposed to broadcast or P2P, where the hello's are sent on to the multicast address 224.0.0.5 and the neighbors are automatically discovered. The attempt state exists only on an NBMA. I think it's when a router has sent an hello to the unicast address of the IP address that has been configured manually with the OSPF neighbor statement, and waits for a hello from that router. If it doesn't receive a hello within the dead timer of 120 seconds, it goes into the down state.


          You can check this link for the configuration  Initial Configurations for OSPF over Non-Broadcast Links - Cisco

          • 2. Re: OSPF attempt state
            Anil

            configured manually??

            how to configure manually ???

            • 3. Re: OSPF attempt state
              sarah

              It's all detailed well in the link. Check it out.

               

              Initial Configurations for OSPF over Non-Broadcast Links - Cisco

              interface Loopback0

                ip address 3.3.3.3 255.255.255.255

                !

                interface Serial2

                ip address 1.1.1.2 255.255.255.0

                encapsulation frame-relay

                 ip ospf priority 2

                no keepalive

                frame-relay map ip 1.1.1.1 16

                !

                router ospf 1

                network 1.1.1.0 0.0.0.255 area 0

                 neighbor 1.1.1.1

                !