ospf中dr,bdr,dr other选举

配置命令：

AR1:
SYS
INT G0/0/0
IP ADD 172.16.1.1 24
ospf dr-priority 255
Q
OSPF
AREA 0
NETWORK 172.16.1.0 0.0.0.255
AR2:
SYS
INT G0/0/0
IP ADD 172.16.2.1 24
ospf dr-priority 254
Q
OSPF
AREA 0
NETWORK 172.16.2.0 0.0.0.255
AR3:
SYS
INT G0/0/0
IP ADD 172.16.3.1 24
ospf dr-priority 1
Q
OSPF
AREA 0
NETWORK 172.16.3.0 0.0.0.255
AR4:
SYS
INT G0/0/0
IP ADD 172.16.4.1 24
ospf dr-priority 1
Q
OSPF
AREA 0
NETWORK 172.16.4.0 0.0.0.255
AR5:
SYS
INT G0/0/0
IP ADD 172.16.5.1 24
ospf dr-priority 1
Q
OSPF
AREA 0
NETWORK 172.16.5.0 0.0.0.255