5441336737

LABORATORIUM JARINGAN KOMPUTER

JURUSANTEKNIK ELEKTRO - INFORMATYKA FAKULTAS TEKNIK UNIYERSITAS ISLAM MALANG 2009-2010

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Step 7

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f Ona per-interface basis using the ip ospf authentication interface subcommand.

g For all interfaces in an area using the area authentication router subcommand.

Configure support for multiple equal-cost routes using the maximum-paths number router subcommand.

OSPF Single-Area Configuration

OSPF configuration differs only slightly from RIP configuration when a single OSPF area is used. The best way to describe the configuration, and the differences with the configuration of the other routing protocols, is to use an example. Following Figurę shows a sample network, and codę shows the configuration on Albuquerque.

interface ethernet 0/0

ip address 10.1.1.1 255.255.255.0

interface serial 0/0

ip address 10.1.4.1 255.255.255.0

interface serial 0/1

ip address 10.1.6.1 255.255.255.0

router ospf 1

network 10.0.0.0 0.255.255.255 area 0

The configuration correctly enables OSPF on all three interfaces on Albuquerque. First, the router ospf 1 global command puts the user in OSPF configuration modę. The router ospf command has a parameter called the OSPF process-id. In some instances, you might want to run multiple OSPF processes in a single router, so the router command uses the processid to distinguish between the processes. The process-id does not have to match on each router, and it can be any integer between 1 and 65,535.

The network command tells a router to enable OSPF on each matched interface, discover neighbors on that interface, assign the interface to that area, and advertise the subnet connected to each interface. In this case, the network 10.0.0.0 0.255.255.255 area 0 command matches all three of Albuquerque's interfaces because the OSPF network command matches interfaces using an address and a wildcard-style mask like those used with IP ACLs. The wildcard mask shown in above example is 0.255.255.255, with address