Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 249)

Multi-Service IronWare Routing Configuration Guide 221
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Displaying OSPF information
State The state of the conversation between the device and the neighbor. This field can have one of the
following values:
•
Down – The initial state of a neighbor conversation. This value indicates that there has been no
recent information received from the neighbor.
•
Attempt – This state is only valid for neighbors attached to non-broadcast networks. It indicates
that no recent information has been received from the neighbor.
•
Init – A Hello packet has recently been seen from the neighbor. However, bidirectional
communication has not yet been established with the neighbor. (The router itself did not appear in
the neighbor's Hello packet.) All neighbors in this state (or higher) are listed in the Hello packets
sent from the associated interface.
•
2-Way – Communication between the two routers is bidirectional. This is the most advanced state
before beginning adjacency establishment. The Designated Router and Backup Designated Router
are selected from the set of neighbors in the 2-Way state or greater.
•
ExStart – The first step in creating an adjacency between the two neighboring routers. The goal of
this step is to decide which router is the master, and to decide upon the initial Database
Description (DD) sequence number. Neighbor conversations in this state or greater are called
adjacencies.
•
Exchange – The router is describing its entire link state database by sending Database Description
packets to the neighbor. Each Database Description packet has a DD sequence number, and is
explicitly acknowledged. Only one Database Description packet can be outstanding at any time. In
this state, Link State Request packets can also be sent asking for the neighbor's more recent
advertisements. All adjacencies in Exchange state or greater are used by the flooding procedure.
In fact, these adjacencies are fully capable of transmitting and receiving all types of OSPF routing
protocol packets.
•
Loading – Link State Request packets are sent to the neighbor asking for the more recent
advertisements that have been discovered (but not yet received) in the Exchange state.
•
Full – The neighboring routers are fully adjacent. These adjacencies will now appear in router links
and network link advertisements.
Neigh
Address The IP address of the neighbor.
For point-to-point links, the value is as follows:
•
If the Pri field is “1”, this value is the IP address of the neighbor router’s interface.
•
If the Pri field is “3”, this is the subnet IP address of the neighbor router’s interface.
Neigh ID The neighbor router’s ID.
Ev The number of times the neighbor’s state changed.
Opt The sum of the option bits in the Options field of the Hello packet. This information is used by Brocade
technical support. Refer to Section A.2 in RFC 2178 for information about the Options field in Hello
packets.
Cnt The number of LSAs that were retransmitted.
TABLE 25 CLI display of OSPF neighbor information (Continued)
Field Description