A.config system ip 10.69.18.5/24
B.config system ip 10.69.18.5 netmask 255.255.255.0
C.config modify system ip 10.69.18.5/24
D.config modify system ip 10.69.18.5 netmask 255.255.255.0
A.config
B.conf
C.en
D.enable
A.192.168.1.85
B.192.168.2.85
C.172.16.1.85
D.172.16.2.85