D-Link DGS-6600-48T Product Manual - Page 61

DGS-6604 m area virtual-link (IPv6) area virtual-link (IPv6) To define an OSPF virtual link, use the area virtual-link command with the optional parameters. To remove a virtual link, use the no form of this command. area AREA-ID virtual-link ROUTER-ID [instance-id INSTANCE-ID] [hello-interval SECONDS] [dead-interval SECONDS] [transmit-delay SECONDS] [retransmit-interval SECONDS] no area AREA-ID virtual-link ROUTER-ID Syntax Description AREA-ID Specifies the area ID assigned to the virtual link. This can be either a decimal value or a valid IPv4 address. There is no default. ROUTER-ID Specifies the router ID associated with the virtual link neighbor. This can be either a decimal value or a valid IPv4 address. There is no default. INSTANCE-ID (Optional) Specifies an Instance identifier. To change this ID from an existing entry, configure the no area command first. The valid setting is from 0 to 255. hello-interval SECONDS (Optional) Specifies the interval in seconds, between the hello packets that the router sends on an interface. The valid setting is 1-65535. dead-interval SECONDS (Optional) Specifies the interval in seconds, during which no packets are received and after which a neighbor is regarded as off-line. The valid setting is 165535. transmit-delay SECONDS (Optional) The interval the router waits before it transmits a packet. The valid setting is 1-65535. retransmit-interval SECONDS (Optional) The interval the router waits before it retransmits a packet. The valid setting is 1-65535. Default Command Mode Usage Guideline No OSPF virtual link is configured. hello-interval SECONDS: 10 seconds dead-interval SECONDS: 40 seconds transmit-delay SECONDS: 1 second retransmit-interval SECONDS: 5 seconds Router configuration All areas in an OSPF autonomous system must be physically connected to the backbone area (area 0). In some cases where this physical connection is not possible, use a virtual link to connect to the backbone through a non-backbone area. As mentioned, use virtual links to connect two parts of a partitioned backbone through a non-backbone area. The area through which the virtual link is configured, is known as a transit area, and it must have the full routing information. The transit area cannot be a stub area. CLI Reference Guide 51