User Manual

Routing
290
M6100 Web Management User Guide
Table 109. OSPF Virtual Link Configuration
Field Description
Neighbor State The OSPF interface state, it can be these values:
• Down — This is the initial interface state. In this state, the lower-level
protocols have indicated that the interface is unusable. In this state,
interface parameters will be set to their initial values. All interface timers
will be disabled, and there will be no adjacencies associated with the
interface.
• Waiting — The router is trying to determine the identity of the (Backup)
Designated Router by monitoring received Hello Packets. The router is
not allowed to elect a Backup Designated Router or a Designated Router
until it transitions out of Waiting state. This prevents unnecessary
changes of (Backup) Designated Router.
• Point-to-Point — The interface is operational, and is connected either to
the virtual link. On entering this state the router attempts to form an
adjacency with the neighboring router. Hello Packets are sent to the
neighbor every Hello Interval seconds.
• Designated Router — This router is itself the Designated Router on the
attached network. Adjacencies are established to all other routers
attached to the network. The router must also originate a network-LSA
for the network node. The network- LSA will contain links to all routers
(including the Designated Router itself) attached to the network.
• Backup Designated Router — This router is itself the Backup
Designated Router on the attached network. It will be promoted to
Designated Router if the present Designated Router fails. The router
establishes adjacencies to all other routers attached to the network. The
Backup Designated Router performs slightly different functions during the
Flooding Procedure, as compared to the Designated Router.
• Other Designated Router — The interface is connected to a broadcast
or NBMA network on which other routers have been selected to be the
Designated Router and Backup Designated Router either. The router
attempts to form adjacencies to both the Designated Router and the
Backup Designated Router.
State Displays the State of the interface. It takes one the following values:
• Down — This is the initial interface state. In this state, the lower-level
protocols have indicated that the interface is unusable. In this state,
interface parameters will be set to their initial values. All interface timers
will be disabled, and there will be no adjacencies associated with the
interface.
• Waiting — The router is trying to determine the identity of the (Backup)
Designated Router by monitoring received Hello Packets. The router is
not allowed to elect a Backup Designated Router or a Designated Router
until it transitions out of Waiting state. This prevents unnecessary
changes of (Backup) Designated Router.
• Point-to-Point — The interface is operational, and is connected either to
the virtual link. On entering this state the router attempts to form an
adjacency with the neighboring router. Hello Packets are sent to the
neighbor every HelloInterval seconds.