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Chapter 4. Routing | 311
ProSafe® Gigabit L3 Managed Stackable Switches Software Administration Manual
Table 41.
Field Description
IPv6 Address The IPv6 address of the interface.
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 OSPFv3 admin mode is enabled.
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 OSPFv3 admin mode is enabled.
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