Multicast and Routing Guide K/KA/KB.15.15

Table 21 CLI display of OSPF neighbor information (continued)
DescriptionField
higher) are listed in the hello packets sent from the associated
interface.
2WAY Communication between the two routers is bidirectional. This is
the most advanced state before beginning adjacency
establishment. The DR and BDR are selected from the set of
neighbors in the 2Way 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 switch is describing its entire link state database by sending
DD packets to the neighbor. Each DD packet has a DD sequence
number and is explicitly acknowledged. Only one DD 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.
Remote transmit queue length—The number of LSAs that the routing switch has
sent to this neighbor and for which the routing switch is awaiting
acknowledgements.
Rxmt QLen
The number of times the neighbor's state has changed.Events
Whether the neighboring router is helping the OSPF router. The possible values
are:
Helper Status
Helper The neighbor is helping.
None The neighbor is not helping.
Amount of time the neighboring router is helping. This time can range from 1
to 1800 seconds with a default time of 120 seconds. Helper Age is 0 when
the router is not helping.
Helper Age
Viewing OSPF redistribution information
As described under “Enabling route redistribution” (page 149), you can configure the routing switch
to redistribute connected, static, and RIP routes into OSPF. When you redistribute a route into
OSPF, the routing switch can use OSPF to advertise the route to its OSPF neighbors.
To display the status of the OSPF redistribution, enter show ip ospf redistribute at any
CLI context level:
182 Open Shortest Path First Protocol (OSPF)