260 | Chapter 15 - OSPF |
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To add or modify a Net Range, click the appropriate button to open the Net Range Dialog Box.
Net Range Dialog Box
The Net Range string has the following syntax:
{OnOff <IP Address> < IP Subnet Mask> AdvertiseDoNotAdvertise}
•On specifies that a Net Range will be used, Off indicates that a Net Range is not being used.
•IP Address is the IP address of the Net Range
•IP Subnet Mask is the subnet mask of the Net Range.
•Advertise specifies that the Net Range will be advertised to other areas. DoNotAdvertise specifies that the network in the Net Range will not be advertised to other areas. This parameter is optional.
ϖNote: DoNotAdvertise only applies to OSPF routes and not to routes learned from external protocols using IP route redistribution. External routes must be excluded by using route filtering.
OSPF Virtual Link
This dialog box displays a list of all IP addresses being used for virtual neigh- bors. Configuring a virtual link is the only way to allow an area which is not contiguous to the backbone area (area 0) to operate.
ϖNote: The virtual link must be configured in both routers which are providing the tunnel to the backbone. These two routers do not need to be physically connected, but they must share a common area called the transit area. (The transit area is designated in the Add OSPF Virtual Link Dialog Box.)
