ACL:访问控制列表
基础的ACL:2000-2999
匹配源IP地址信息
[R2]acl 2000
[R2-acl-basic-2000]rule deny source 12.1.1.1 0.0.0.255
[R2-acl-basic-2000]rule permit source any
[R2-acl-basic-2000]int g0/0/0
[R2-GigabitEthernet0/0/0]traffic-filter inbound acl 2000
高级的ACL:3000-3999
匹配源IP地址信息、目的IP地址信息、协议
[R2-acl-adv-3000]int g0/0/0
[R2-GigabitEthernet0/0/0]traffic-filter inbound acl 3000
[R2]acl 3000
[R2-acl-adv-3000]rule deny icmp icmp-type echo source 12.1.1.1 0.0.0.255 destination 23.1.1.3 0.0.0.0
[R2-acl-adv-3000]rule permit icmp source any destination any