User manual

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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 (type 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 Data
OSPF Admin Mode - The default value is 'disable.' You can 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 portion 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 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.
• 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. However, it may still
be desirable to gain information on the quality of this interface, either through 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 Loopback state. To facilitate 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 determine the identity of the (Backup) Designated Router for
the network 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.
• 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.
The State is only displayed if the OSPF admin mode is enabled.