Compatible Systems 5.4 - Manual (Page 266)

260 Chapter 15 - OSPF
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:
{On|Off <IP Address> < IP Subnet Mask> Advertise|DoNotAdvertise}
• 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.
v Note: 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.
v Note: 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.)