first of all, OSPF works always, even if in your topology the AD is worst. You have anyway a topology table, and an adjacency table.
In Exstart state, the neighboring routers establish a master/slave relationship and determine the initial database descriptor (DBD) sequence number to use while exchanging DBD packets. In other words, the routers and their DR and BDR establish a master-slave relationship and choose the initial sequence number for adjacency formation. The router with the higher router ID becomes the master and starts the exchange, and as such, is the only router that can increment the sequence number. Note that one would logically conclude that the DR/BDR with the highest router ID will become the master during this process of master-slave relation. Remember that the DR/BDR election might be purely by virtue of a higher priority configured on the router instead of highest router ID. Thus, it is possible that a DR plays the role of slave. And also note that master/slave election is on a per-neighbor basis.
About your problem: adjacency is out, maybe MTU mismatch? Check your serial link.
The suggestion that OSPF is disabled because of higher AD is incorrect. Andrea is quite correct that OSPF will still run, will send hello messages, and will build adjacencies. It does not matter whether the OSPF routes make it into the routing table or not, but OSPF is still active.
If there is an MTU mismatch I am not sure that the neighbor relationship would be formed. But I agree that the messages indicate that there is some issue on the serial interface. the suggestion of debug ip ospf adj is a good place to start.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.