Accton Technology ES4626 - Manual (Page 492)

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configuration commands for the routers in the stub area: stub and default-cost. All routers
connected to the stub area should be configured with area stub command. As for area
border routers connected to the stub area, their introducing cost is defined with area
default-cost command.
Example:
Switch # config terminal
Switch (config)# router ipv6 ospf
Switch (config-router)# area 1 stub
Relevant Commands: area default-cost
13.7.3.4 area virtual-link
Command: area <id> virtual-link A.B.C.D [instance-id <instance-id> | INTERVAL
<value>]
no area <id> virtual-link A.B.C.D [instance-id <instance-id> |
|INTERVAL]
Function:
Configure a logical link between two backbone areas physically divided by
non-backbone area. The “no area <id> virtual-link A.B.C.D [instance-id <instance-id>
| |INTERVAL] ” command removes this virtual-link.
Parameter: <id> is the area number which could be digits ranging between 0 ～
4294967295, and also as an IP address.
<instance-id> is the interface instance ID ranging between 0~255 and defaulted at 0
INTERVAL= [dead-interval|hello-interval|retransmit-interval|transmit-delay]
<value>:
The delay or interval seconds, ranging between 1~65535
<dead-interval>: A neighbor is considered offline for certain dead interval without
its group messages which the default is 40 seconds.
<hello-interval>: The time interval before the router sends a hello group message,
default is 10 seconds
<retransmit-interval>: The time interval before a router retransmitting a group
message, default is 5 seconds
<transmit-delay>:
The time delay before a router sending a group messages, 1
second by default
Default: No default configuration.
Command Mode: OSPFv3 protocol mode
Usage Guide: In the OSPF all non-backbone areas will be connected to a backbone
area. If the connection to the backbone area is lost, virtual link will repair this connection.
You can configure virtual link between any two backbone areas routers connected with
the public non-backbone area. The protocol treat routers connected by virtual links as a
point-to-point network