3Com 5500-EI PWR - OSPF Configuration Examples; Configuring DR;BDR Election

4-27
To do... Use the command... Remarks
Display OSPF routing table display ospf [ process-id ] routing
Display OSPF virtual links display ospf [ process-id ] vlink
Display OSPF request list display ospf [ process-id ] request-queue
Display OSPF retransmission list display ospf [ process-id ] retrans-queue
Display the information about
OSPF ABR and ASBR
display ospf [ process-id ] abr-asbr
Display OSPF interface
information
display ospf [ process-id ] interface
interface-type interface-number
Display OSPF errors display ospf [ process-id ] error
Display OSPF ASBR
summarization information
display ospf [ process-id ] asbr-summary
[ ip-address mask ]
Reset OSPF process(es) reset ospf { all | process-id }
Clear the statistics of one or all
OSPF processes
reset ospf statistics { all | process-id }
Available in
user view
OSPF Configuration Examples
Configuring DR/BDR Election
Network requirements
Use OSPF to realize interconnection between devices in a broadcast network. Devices with higher
performance should become the DR and BDR to improve network performance. Devices with lower
performance are forbidden to take part in DB/BDR election.
Based on the customer requirements and networking environment, assign proper priorities to
interfaces.
Network diagram
Figure 4-8 Network diagram for DR/BDR election
DR
BDR
Switch A
Switch D
Switch CSwitch B
Vlan-int1
Vlan-int1
Vlan-int1
Vlan-int1
Device Interface IP address Router ID Interface priority
Switch A Vlan-int1 196.1.1.1/24 1.1.1.1 100
Switch B Vlan-int1 196.1.1.2/24 2.2.2.2 0
Switch C Vlan-int1 196.1.1.3/24 3.3.3.3 2