User Manual

M4300 Intelligent Edge Series Fully Managed Stackable Switches
Configure OSPF and OSPFv3 User Manual403
OSPF uses this value in computing shortest paths. The range is from 1 to 65,535. The
default is 1. Metric Cost is configurable only if OSPFv3 is initialized on the interface.
17. Click the Apply button.
Your settings are saved.
The following table describes the nonconfigurable information that is displayed.
Table 145. 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 the 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.