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ProSafe M5300 Switch
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 LSA flooding, as compared to the Designated Router.
Other Designated Router The interface is connected to a broadcast 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.
Designated Router The identity of the Designated Router for this network, in the view of the
advertising router. The Designated Router is identified here by its router ID.
The value 0.0.0.0 means that there is no Designated Router. This field is
only displayed if the OSPF admin mode is enabled.
Backup Designated Router The identity of the Backup Designated Router for this network, in the view
of the advertising router. The Backup Designated Router is identified here
by its router ID. Set to 0.0.0.0 if there is no Backup Designated Router.
Number of Link Events This is the number of times the specified OSPF interface has changed its
state.
Local Link LSAs The number of opaque LSAs whose flooding scope is the link on this
interface.
Local Link LSA Checksum The sum of the checksums of local link LSAs for this link.
Field Description