Edge-Core ECS4660-28F, Management Manual, Page: 1802 / 2020

C
HAPTER
51
| IP Routing Commands
Open Shortest Path First (OSPFv3)
– 1802 –
R
ELATED
C
OMMANDS
area default-cost (1797)
area virtual-link
This command defines a virtual link. To remove a virtual link, use the no
form with no optional keywords. To restore the default value for an
attribute, use the no form with the required keyword.vvvv
S
YNTAX
area area-id virtual-link router-id
[ dead-interval seconds ] [ hello-interval seconds ]
[ retransmit-interval seconds ] [ transmit-delay seconds ]
no area area-id virtual-link router-id
[ dead-interval | hello-interval | retransmit-interval |
transmit-delay ]
area-id - Identifies the transit area for the virtual link.The area ID
can be in the form of an IPv4 address or as a four octet unsigned
integer ranging from 0-4294967295.
router-id - Router ID of the virtual link neighbor. This specifies the
Area Border Router (ABR) at the other end of the virtual link. To
create a virtual link, enter this command for an ABR at both ends of
the link. One of the ABRs must be next to the isolated area and the
transit area at one end of the link, while the other ABR must be next
to the transit area and backbone at the other end of the link.
dead-interval seconds - Specifies the time that neighbor routers
will wait for a hello packet before they declare the router down. This
value must be the same for all routers attached to an autonomous
system. (Range: 1-65535 seconds; Default: 4 x hello interval, or 40
seconds)
hello-interval seconds - Specifies the transmit delay between
sending hello packets. Setting the hello interval to a smaller value
can reduce the delay in detecting topological changes, but will
increase the routing traffic. This value must be the same for all
routers attached to an autonomous system. (Range: 1-65535
seconds; Default: 10 seconds)
retransmit-interval seconds - Specifies the interval at which the
ABR retransmits link-state advertisements (LSA) over the virtual
link. The retransmit interval should be set to a conservative value
that provides an adequate flow of routing information, but does not
produce unnecessary protocol traffic. However, note that this value
should be larger for virtual links. (Range: 1-65535 seconds;
Default: 5 seconds)
transmit-delay seconds - Estimates the time required to send a
link-state update packet over the virtual link, considering the
transmission and propagation delays. LSAs have their age
incremented by this amount before transmission. This value must
be the same for all routers attached to an autonomous system.
(Range: 1-65535 seconds; Default: 1 second)