3Com 3032 Configuration Manual page 447

Run
display ospf peer
3 peers.
[RouterA] display ospf peer
Peer pri
4.4.4.4 1
3.3.3.3 2
2.2.2.2 0
The status of every peer is full, which means that Router A has created
neighboring relation with all peers. Only DR and BDR have created neighboring
relation with all routers on the network. Router A is DR and Router C is BDR on the
network. All other peers are DRother, which means that they are neither DR nor
BDR.
Change the preference of Router B to 200:
[RouterB-Ethernet0] ospf dr-priority 200
Run
display ospf peer
preference of Router B has been changed to 200, but it is not DR.
[RouterA] display ospf peer
Peer pri
4.4.4.4 1
3.3.3.3 2
2.2.2.2 200
Only when the DR no longer exists on the network are the DR changed. Shut
down Router A and run
that Router C, which was BDR, now becomes DR and so does Router B.
[RouterD] display ospf peer
Peer pri
3.3.3.3 2
2.2.2.2 200
Shutting down the router and restarting leads to the reelection of DR and BDR.
Restart router A and run the
that router B is elected DR (whose preference is 200) and Router A becomes BDR
(whose preference is 100).
[RouterD] display ospf peer
Peer pri
1.1.1.1 100
3.3.3.3 2
2.2.2.2 200
on Router A to show OSPF peer. Note that Router A has
State
full/DRother
full/BDR
full/DRother
on Router A to show OSPF peers. Note that the
State
full/DRother
full/BDR
full/DRother
on Router D to display peers. Note
display ospf peer
State
full/BDR
full/DR
display ospf peer
State
full/BDR
full/DRother
full/DR
OSPF Configuration Example
Address Interface
192.1.1.4 Ethernet0
192.1.1.3 Ethernet0
192.1.1.2 Ethernet0
Address Interface
192.1.1.4 Ethernet0
192.1.1.3 Ethernet0
192.1.1.2 Ethernet0
Address Interface
192.1.1.3 Ethernet0
192.1.1.2 Ethernet0
command to display peers. Note
Address Interface
192.1.1.1 E0
192.1.1.3 E0
192.1.1.2 E0
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