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Authentication Key ID - Enter the ID to be used for authentication. You will only be prompted to
enter an ID when you select 'Encrypt' as the authentication type. The ID is a number between 0 ad
255, inclusive.
Metric Cost - Enter the value on this interface for the cost TOS (ty pe of service). The range for the
metric cost is between 1 and 65,535. Metric Cost is only configurable/displayed if OSPF is initialized
on the interface.
Non-Configurable Da ta
OSPF Admin Mode - The default value is 'disable.' You ca n configure OSPF parameters without
enabling OSPF Admin Mode, but they will have no effect until you enable Admin Mode. The following
information will be displayed only if the Admin Mode is enabled: State, Designated Router, Backup
Designated Router, Number of Link Events, LSA Ack Interval, and Metric Cost. For OSPF to be fully
functional, you must enter a valid IP Address and Subnet Mask via the Interface IP Configuration
page or through the CLI command: config ip interface network .
IP Address - The IP address of the interface.
Subnet Mask - The subnet/network mask, that indicates the po rtion of the IP interface address that
identifies the attached network.
LSA Ack Interval - The number of seconds between LSA Acknowledgment packet transmissions,
which must be less than the Retransmit Interval.
State - The current state of the selected router interface. One of:
• Down - This is the initial int erface state. In this state, the lo wer-level proto cols ha ve 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 adj acencies associated with
the interface.
• Loopback - In this state, the router's interface to the network is looped back either in
hardware or software. The interface is unavailable for regular data traffic. Howeve r, it may still
be desirable to gain information on the quality of this interface, either thro ugh sending ICMP
pings to the interface or through something like a bit error test. For this reason, IP packets
may still be addressed to an interface in Loop back state. To facilitat e this, such interfaces are
advertised in router- LSAs as single host routes, whose destination is the IP interface
address.
• Waiting - The router is trying to dete rmine the ide ntity of the (Backup) Design ated Router fo r
the network by monitoring received Hell o Packets. The router is not allowed to elect a Backup
Designated Router or a Design ated Router until it transitions out of Waiting state. This
prevents unnecessary changes of (Backup) Designated Router.
• Designated Router - This router is itself the Designated Router on the attached network.
Adjacencies are est ablished 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 Desi gnated Router on the
attached network. It will be promoted to De signated 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 t o the Designated Router.
• Other Designated Rou ter - The interface is connected to a broadca st or NBM A network on
which other routers have b een selected to be the De signated Router and Backup Designated
Router either. The router attempts to form adjacencies to both the Design ated Router and the
Backup Designated Router.
The State is only displayed if the OSPF admin mode is enabled.