Allied Telesis AR2050V Command Reference Manual page 911

OSPF C
OMMANDS
-
AREA VIRTUAL LINK
Mode Router Configuration
Usage You can configure virtual links between any two backbone routers that have an
interface to a common non-backbone area. The protocol treats these two routers,
joined by a virtual link, as if they were connected by an unnumbered
point-to-point network. To configure a virtual link, you require:
•
•
Configure the hello-interval to be the same for all routers attached to a common
network. A short hello-interval results in the router detecting topological changes
faster but also an increase in the routing traffic.
The retransmit-interval is the expected round-trip delay between any two
routers in a network. Set the value to be greater than the expected round-trip delay
to avoid needless retransmissions.
The transmit-delay is the time taken to transmit a link state update packet on the
interface. Before transmission, the link state advertisements in the update packet,
are incremented by this amount. Set the transmit-delay to be greater than zero.
Also, take into account the transmission and propagation delays for the interface.
awplus#
Example
awplus(config)#
awplus(config-router)#
dead 10
C613-50186-01 Rev B
Parameter Description
message-digest
Use message-digest authentication.
null
Use null authentication to override password or message
digest.
dead-interval
If no packets are received from a particular neighbor for
dead-interval seconds, the router considers that neighboring
router as being off-line.
Default: 40 seconds
<1-65535>
hello-interval
The interval the router waits before it sends a hello packet.
Default: 10 seconds
<1-65535>
retransmit-
The interval the router waits before it retransmits a packet.
interval
Default: 5 seconds
<1-3600>
transmit-delay
The interval the router waits before it transmits a packet.
Default: 1 seconds
<1-3600>
The transit area ID, i.e. the area ID of the non backbone area that the two
backbone routers are both connected to.
The corresponding virtual link neighbor's router ID. To see the router ID use
the show ip ospf command.
configure terminal
router ospf 100
Command Reference for AR2050V
AlliedWare Plus™ Operating System - Version 5.4.7-1.x
The number of seconds in the interval.
The number of seconds in the interval.
The number of seconds in the interval.
The number of seconds in the interval.
area 1 virtual-link 10.10.11.50 hello 5
911