TABLE 58 show ip ospf neighbor output descriptions (continued)
Field Description
• 1 = point-to-point link
• 3 = point-to-point link with assigned subnet
State The state of the conversation between the device and the neighbor. This
eld 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 rst 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 ooding 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 eld is "1", this value is the IP address of the neighbor
router’s interface.
• If the Pri eld 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 eld 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 eld in Hello packets.
Displaying OSPF information
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