Information Technology Reference
In-Depth Information
Configure a password for console connections.
■
Configure a password for VTY connections.
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Task 3: Configure and Activate Ethernet and Loopback
Addresses
Configure interfaces on R1, R2, and R3.
Step 1.
Configure the Ethernet and Loopback interfaces on the R1, R2, and R3 routers with the IP
addresses from the table under the topology diagram. Use the
show ip interface brief
command to verify that the IP addressing is correct. When you have finished, be sure to
save the running configuration to the NVRAM of the router.
Verify IP addressing and interfaces.
Step 2.
Use the
show ip interface brief
command to verify that the IP addressing is correct and
that the interfaces are active.
When you have finished, be sure to save the running configuration to the NVRAM of the
router.
Task 4: Configure OSPF on the DR Router
The DR and BDR election process takes place as soon as the first router has its interface enabled on
the multiaccess network. This can happen as the routers are powered on or when the OSPF
network
command for that interface is configured. If a new router enters the network after the DR and BDR
have already been elected, it will not become the DR or BDR even if it has a higher OSPF interface
priority or router ID than the current DR or BDR. Configure the OSPF process on the router with the
highest router ID first to ensure that this router becomes the DR.
Use the
router ospf
command in global configuration mode to enable OSPF on the R3
router.
Step 1.
Enter a process ID of 1 for the
process-ID
parameter. Configure the router to advertise the
192.168.1.0/24 network. Use an area ID of 0 for the OSPF
area-id
parameter in the
net-
work
statement.
R3(config)#
router ospf 1
R3(config-router)#
network 192.168.1.0 0.0.0.255 area 0
R3(config-router)#
end
Use the
show ip ospf interface
command to verify that the OSPF has been configured
correctly and that R3 is the DR.
Step 2.
R3#
show ip ospf interface
FastEthernet0/0 is up, line protocol is up
Internet address is 192.168.1.3/24, Area 0
Process ID 1, Router ID 192.168.31.33, Network Type BROADCAST, Cost: 1
Transmit Delay is 1 sec, State DR, Priority 1
Designated Router (ID) 192.168.31.33, Interface address 192.168.1.3
No backup designated router on this network
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:07
