User Manual

OSPF and OSPFv3
384
M4200 and M4300 Series ProSAFE Managed Switches Web Management User Manual
18. Click the Apply button.
The updated configuration is sent to the switch. Configuration changes take effect
immediately.
The following table describes the nonconfigurable data that is displayed.
Table 143. Advanced OSPFv3 Interface Configuration
Field Description
IPv6 Address The IPv6 address of the interface.
LSA Ack Interval (secs) 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. State is one of the
following:
• Down. This is the initial interface state. The lower-level protocols
indicate that the interface is unusable. Interface parameters are set to
their initial values. All interface timers are disabled, and there are no
adjacencies associated with the interface.
• Loopback. The router's interface to the network is looped back in either
the hardware or software. The interface is unavailable for regular data
traffic. However, you might want to gain information about 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 can
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 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 contains links to all routers
(including the designated router) attached to the network.
• Backup Designated Router. This router is the backup designated
router on the attached network. It is 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
procedure, as compared to the designated router.
• Other Designated Router. The interface is connected to a broadcast
or NBMA network on which other routers were selected to be either the
designated router or backup designated router. The router attempts to
form adjacencies to both the designated router and the backup
designated router.
Note: The state is displayed only if the OSPFv3 Admin mode is enabled.