area virtual-link
(OSPFv3)
Creates or modifies virtual links for an area.
Syntax
area
{
ip-addr
|
decimal
}
virtual-link
A.B.C.D
[
dead-interval
time
|
hello-interval
time
|
hello-jitter
interval
|
retransmit-interval
time
|
transmit-delay
time
]
Command Default
No virtual links are created.
Parameters
-
ip-addr
- Area address in IP address format.
-
decimal
- Area address in decimal format.
-
A.B.C.D
- ID of the OSPFv3 device at the remote end of the virtual link.
-
dead-interval
time
- How long a neighbor device waits for a hello packet from the current device before declaring the device down. This value must be the same for all devices and access servers that are attached to a common network. Valid values range from 3 through 65535 seconds. The default is 40 seconds.
-
hello-interval
time
- Time between hello packets that the device sends on an interface. The value must be the same for all devices and access servers that are attached to a common network. Valid values range from 1 through 65535 seconds. The default is 10 seconds.
-
hello-jitter
interval
- Sets the allowed jitter between hello packets. Valid values range from 1 through 50 percent (%). The default value is 10%.
-
retransmit-interval
time
- Time between Link State Advertisement (LSA)
retransmissions for adjacencies belonging to the interface. Set this
interval to a value larger than the expected round-trip delay between any
two devices on the attached network. Valid values range from 1 through 3600
seconds. The default is 5 seconds.
-
transmit-delay
time
- Estimated time required to send an LSA on the interface. This value must be an integer greater than zero. The age of each LSA in the update packet is incremented by the value of this parameter before transmission occurs. Valid values range from 0 through 3600 seconds. The default is 1 second.
Modes
OSPFv3 router configuration mode
OSPFv3 router VRF configuration mode
Usage Guidelines
The values of the
dead-interval and
hello-interval
parameters must be the same at both ends of a virtual link. Therefore, if you modify the values of these parameters at one end of a virtual link, you must make the same modifications on the other end of the link. The values of the other virtual link parameters do not require synchronization.
The
no form of the command removes a virtual link.
Examples
The following example creates a virtual link for an area whose decimal address is 1, and where the ID of the OSPFv3 device at the remote end of the virtual link is 209.157.22.1.
device# configure terminal
device(config)# ipv6 router ospf
device(config-ipv6-router-ospf-vrf-default-vrf)# area 1 virtual-link 209.157.22.1
