Information Technology Reference
In-Depth Information
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 0, Adjacent neighbor count is 0
Suppress hello for 0 neighbor(s)
Task 5: Configure OSPF on the BDR
Configure the OSPF process on the router with the second-highest router ID next to ensure that this
router becomes the BDR.
Use the
router ospf
command in global configuration mode to enable OSPF on the R2
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
network
statement:
R2(config)#
router ospf 1
R2(config-router)#
network 192.168.1.0 0.0.0.255 area 0
R2(config-router)#
end
%SYS-5-CONFIGI: Configured from console by console
R2#
00:08:51: %OSPF-5-ADJCHG: Process 1, Nbr 192.168.31.33 on FastEthernet0/0
from LOADING to FULL, Loading Done
Notice that an adjacency is formed with the R3 router. It can take up to 40 seconds for the
R3 router to send a Hello packet. When this packet is received, the neighbor relationship is
formed.
Use the
show ip ospf interface
command to verify that the OSPF has been configured
correctly and that R2 is the BDR.
Step 2.
R2#
show ip ospf interface
FastEthernet0/0 is up, line protocol is up
Internet address is 192.168.1.2/24, Area 0
Process ID 1, Router ID 192.168.31.22, Network Type BROADCAST, Cost: 1
Transmit Delay is 1 sec, State BDR, Priority 1
Designated Router (ID) 192.168.31.33, Interface address 192.168.1.3
Backup Designated Router (ID) 192.168.31.22, Interface address
192.168.1.2
Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5
Hello due in 00:00:03
Index 1/1, flood queue length 0
Next 0x0(0)/0x0(0)
Last flood scan length is 1, maximum is 1
Last flood scan time is 0 msec, maximum is 0 msec
Neighbor Count is 1, Adjacent neighbor count is 1
Adjacent with neighbor 192.168.1.3 (Designated Router)
Suppress hello for 0 neighbor(s)
