3Com Switch 7750 Configuration Guide

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322 CHAPTER 34: OSPF CONFIGURATION

Network diagram

Figure 73 DR election based on OSPF priority

Configuration procedure

# Configure SwitchA.

<SwitchA> system-view

[SwitchA] interface Vlan-interface 1

[SwitchA-Vlan-interface1] ip address 196.1.1.1 255.255.255.0

[SwitchA-Vlan-interface1] ospf dr-priority 100

[SwitchA] router id 1.1.1.1

[SwitchA] ospf

[SwitchA-ospf-1] area 0

[SwitchA-ospf-1-area-0.0.0.0] network 196.1.1.0 0.0.0.255

# Configure SwitchB.

<SwitchB> system-view

[SwitchB] interface Vlan-interface 1

[SwitchB-Vlan-interface1] ip address 196.1.1.2 255.255.255.0

[SwitchB-Vlan-interface1] ospf dr-priority 0

[SwitchB] router id 2.2.2.2

[SwitchB] ospf

[SwitchB-ospf-1] area 0

[SwitchB-ospf-1-area-0.0.0.0] network 196.1.1.0 0.0.0.255

# Configure SwitchC.

<SwitchC> system-view

[SwitchC] interface Vlan-interface 1

[SwitchC-Vlan-interface1] ip address 196.1.1.3 255.255.255.0

[SwitchC-Vlan-interface1] ospf dr-priority 2

[SwitchC] router id 3.3.3.3

[SwitchC] ospf

[SwitchC-ospf-1] area 0

[SwitchC-ospf-1-area-0.0.0.0] network 196.1.1.0 0.0.0.255

Device Interface IP address Router ID Interface DR

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

Switch D Vlan-int1 196.1.1.4/24 4.4.4.4 1

BDR

Switch A

Switch D

Switch CSwitch B

Vlan-int1