Name
area virtual-link — router, OSPF
Synopsis
areaarea-idvirtual-linkrouter-id[hello-intervalseconds] [retransmit-intervalseconds] [transmit-delayseconds] [dead-intervalseconds] [authentication-keykey] [message-digest-keykeyidmd5key] no areaarea-idvirtual-linkrouter-id
Configures
An OSPF virtual link
Default
None
Description
This command establishes a virtual link that connects a broken OSPF backbone; in OSPF, the backbone must be contiguous. It is useful when a contiguous backbone is not possible. Virtual links can also be used to create an area that does not have a direct link to the backbone (area 0).
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area-id The ID of the area being crossed by the virtual link.
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router-id The ID of the router at the other end of the virtual link.
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hello-interval seconds Optional. The time in seconds between transmission of hello messages by the router over the virtual link. The default is 10 seconds. All routers participating in the same area must have the same hello interval.
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retransmit-interval seconds Optional. The time in seconds that a router waits before retransmitting a link-state announcement (LSA). The default is five seconds. When setting this value, you need to ensure that the time includes the entire round trip of the packet.
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transmit-delay seconds Optional. This is the estimated time, in seconds, that the interface will take to transmit the packet. An LSA’s age is decremented by this value before transmission. The default is one second.
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dead-interval seconds Optional. A router ...