你好!假设VLAN 10对应192.168.1.0/24网段,外网的IP地址为202.202.202.0/24三层交换写ACLaccess-list 100 ip permit 192.168.1.0 0.0.0.255 202.202.202.0 0.0.0.255interface vlan 10ip access-group 100 in