3Com MSR 50 Series Configuration Manual page 1065

# Configure the DR priority of Router A as 100.
[RouterA] interface ethernet 1/0
[RouterA-Ethernet1/0] ospfv3 dr-priority 100
[RouterA-Ethernet1/0] quit
# Configure the DR priority of Ethernet 1/0 as 0 on Router B.
[RouterB] interface ethernet 1/0
[RouterB-Ethernet1/0] ospfv3 dr-priority 0
[RouterB-Ethernet1/0] quit
# Configure the DR priority of Ethernet 1/0 as 2 on Router C.
[RouterC] interface ethernet 1/0
[RouterC-Ethernet1/0] ospfv3 dr-priority 2
[RouterC-Ethernet1/0] quit
# Display neighbor information on Router A. You can find DR priorities have been
updated, but DR and BDR are not changed.
[RouterA] display ospfv3 peer
OSPFv3 Area ID 0.0.0.0 (Process 1)
----------------------------------------------------------------------
Neighbor ID Pri
2.2.2.2 0
3.3.3.3 2
4.4.4.4 1
# Display neighbor information on Router D. You can find Router D is still the DR.
[RouterD] display ospfv3 peer
OSPFv3 Area ID 0.0.0.0 (Process 1)
----------------------------------------------------------------------
Neighbor ID Pri
1.1.1.1 100
2.2.2.2 0
3.3.3.3 2
4 Restart DR/BDR election
# Use the shutdown and undo shutdown commands on interfaces to restart
DR/BDR election (omitted).
# Display neighbor information on Router A. You can find Router C becomes the
BDR.
[RouterA] display ospfv3 peer
OSPFv3 Area ID 0.0.0.0 (Process 1)
----------------------------------------------------------------------
Neighbor ID Pri
2.2.2.2 0
3.3.3.3 2
4.4.4.4 1
# Display neighbor information on Router D. You can find Router A becomes the
DR.
[RouterD] display ospfv3 peer
OSPFv3 Area ID 0.0.0.0 (Process 1)
----------------------------------------------------------------------
Neighbor ID Pri
State Dead Time
2-Way/DROther 00:00:38
Full/Backup 00:00:32
Full/DR 00:00:36
State Dead Time
Full/DROther 00:00:33
Full/DROther 00:00:36
Full/Backup 00:00:40
State Dead Time
Full/DROther 00:00:31
Full/Backup 00:00:39
Full/DROther 00:00:37
State Dead Time
OSPFv3 Configuration Examples
Interface Instance ID
Eth1/0 0
Eth1/0 0
Eth1/0 0
Interface Instance ID
Eth1/0 0
Eth1/0 0
Eth1/0 0
Interface Instance ID
Eth1/0 0
Eth1/0 0
Eth1/0 0
Interface Instance ID
1065