Digisol DG-GS4826S, Management Manual

Page: 1244 / 1344

C
HAPTER
48 | IP Routing Commands
Open Shortest Path First (OSPFv3)
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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)
C
OMMAND
M
ODE
Router Configuration
D
EFAULT
S
ETTING
area-id : None
router-id : None
hello-interval : 10 seconds
retransmit-interval : 5 seconds
transmit-delay : 1 second
dead-interval : 40 seconds
C
OMMAND
U
SAGE
u
All areas must be connected to a backbone area (0.0.0.0) to maintain
routing connectivity throughout the autonomous system. If it not
possible to physically connect an area to the backbone, you can use a
virtual link. A virtual link can provide a logical path to the backbone for
an isolated area, or can be configured as a backup connection that can
take over if the normal connection to the backbone fails.
u
A virtual link can be configured between any two backbone routers that
have an interface to a common non-backbone area. The two routers
joined by a virtual link are treated as if they were connected by an
unnumbered point-to-point network.
u
Any area disconnected from the backbone must include the transit area
ID and the router ID for a virtual link neighbor that is adjacent to the
backbone.
E
XAMPLE
This example creates a virtual link using the defaults for all optional
parameters.
Console(config-router)#area 3 virtual-link 192.168.0.9
Console(config-router)#