- 882 -
Hello Interval - Enter the OSPFv3 hello interval for the specified interface in seconds. This parameter
must be the same for all routers attached to a network. Valid value s ran ge from 1 to 65,535. The
default is 10 seconds.
Dead Interval - Enter the OSPFv3 dead interval for the specified interface in seconds. This specifie s
how long a router will wait to see a neighbor router's Hello packets before declaring that the router is
down. This parameter must be the same for all routers attached to a network. This value should a
multiple of the Hello Interval (e.g. 4). Valid values range from 1 to 2147483647. The default is 40.
Iftransit Delay Interval - Enter the OSPFv3 Tran sit Delay for the specified interface. This specifies
the estimated number of seconds it take s to transmit a link state update packet over the selected
interface. Valid values range from 1 to 3600 seconds (1 hour). The default value is 1 se cond.
MTU Ignore - Disables OSPFv3 MTU mismatch detection on receiving packets. Default value is
Disable.
Passive Mode - Make an interface passive to prevent OSPF from forming an adjace ncy on an
interface. OSPF advertises networks attached to passive interfaces as stub net works. Interfaces are
not passive by default.
Interface Type - The interface type, which can either be set to broadca st mode or point to poin t
mode. The default interface type is broadcast.
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 if OSPFv3 is initialized on the
interface.
Non-Configurable Da ta
IPv6 Address - The IPv6 address of the interface.
LSA Ack Interval - The number of seconds between LSA Acknowledgment packet tran smissions,
which must be less than the Retransmit Interval.
State - The current state of the selected router interface. One of:
• Down - This is the initial int erface state. In this state, the lo wer-level proto cols ha ve 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 adj acencies 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. Howeve r, it may still
be desirable to gain information on the quality of this interface, either thro ugh 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 Loop back state. To facilitat e 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 dete rmine the ide ntity of the (Backup) Design ated Router fo r
the network by monitoring received Hell o Packets. The router is not allowed to elect a Backup
Designated Router or a Design ated Router until it transitions out of Waiting state. This
prevents unnecessary changes of (Backup) Designated Ro uter.
• Designated Router - This router is itself the Designated Route r on the attached network.
Adjacencies are est ablished 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 De signated Router if the present Designated Route r
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 t o the Designated Router.