User Manual UMN:CLI
V5808
579
11.3.6.4 Virtual Link
In OSPFv3, all areas must be connected to a backbone area. If there is a break in
backbone continuity, or the backbone is purposefully portioned, you can establish a virtual
link. The virtual link must be configured in both routers.
OSPFv3 network regards virtual link routers as Point-to-point router. Therefore, the Hello-
interval, Retransmit-interval, Transmit-delay must be consistent across all routers in an
attached network.
User can configure time period for Hello-interval, Retransmit-interval, Transmit-delay and
Dead-interval to operate virtual link.
The following items describe 4 configurations for virtual link:
• Hello-interval
OSPFv3 router sends Hello packet to notify existence of itself. Hello-interval is that
packet transmission interval.
• Retransmit-interval
When router transmits LSA, it is waiting for approval information come from receiver.
In this time, if there is no answer from receiver for configured time, the router trans-
mits LSA again. Retransmit-interval is configuration of the time interval between
transmission and retransmission
• Dead-interval
If there is no hello packet for the configured time. The router perceives other router is
stopped working. Dead-interval is configuration of the time interval which perceives
other router is stopped operating.
• Transmit-delay
When a router transmits LSA, the traffic can be delayed by status of communications.
Transmit-delay is considering of the configuration for LSA transmission time.
Configuration for virtual link can be selected more than 2 options without order. The
following is explaining options of command:
• hello-interval <1-65535>
• retransmit-interval <1-65535>
• dead-interval <1-65535>
• transmit-delay <1-65535>
To configure a virtual link with one option, use the following command.
area {A.B.C.D | <0-4294967295>} virtual-link
A.B.C.D [instance-id <0-255>]
Configures a virtual link.
area {A.B.C.D | <0-4294967295>} virtual-link
A.B.C.D {hello-interval | retransmit-interval |
dead-interval | transmit-delay} <1-65535>
To Next Page
Loading...