Configuring Ospf - Novell NETWARE 6-DOCUMENTATION Manual

Configuring OSPF

configuring these parameters can increase routing traffic or cause loss of
connectivity on your network.
4
Press Esc until you are prompted to save your changes, and then select
Yes.
5
Press Esc to return to the Internetworking Configuration menu.
6
If you want these changes to take effect immediately, select Reinitialize
System > Yes to activate your changes.
OSPF was developed to satisfy the need for a scalable, open-standards routing
protocol for large IP internetworks. It is a link state protocol that provides
highly efficient routing and fast convergence.
OSPF makes large internetworks more manageable by enabling you to
partition them into administrative domains called areas. Areas impose a
hierarchy to the internetwork. All OSPF areas are connected to a central
backbone area by an Area Border Router (ABR). The ABR shares OSPF
routing information between the area and the backbone.
When configuring an OSPF area, you assign to it a 4-byte decimal number
called the Area ID. You also indicate which of the router's network interfaces
belong to the area and whether the area is a stub area.
Novell TCP/IP supports the use of virtual links between OSPF routers. A
virtual link patches together a partitioned backbone. It creates a direct point-
to-point link between the ABRs that connect the partitioned backbone areas
through the transit area.
Most IP internetworks in use today are not pure OSPF networks; that is,
portions of these internetworks still employ other routing protocols, such as
RIP. OSPF uses an Autonomous System Boundary Router (ASBR) to import
and propagate routing information from these protocols. ASBRs are always
located on the border of an OSPF domain. When configuring OSPF, you can
enable your router to operate as an ASBR. For an ASBR to import RIP routes
learned through an interface, RIP must be enabled on that interface.
Each OSPF router has its own Router ID, a 4-byte number that uniquely
identifies the router and enables it to participate in informational exchanges
with neighboring routers. The default Router ID is the IP address of the first
interface bound to IP on the router. Although INETCFG enables you to change
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Protocols