ACL插入:

Gateway(config)#ip access-list extended 100
Gateway(config-ext-nacl)#?
Ext Access List configuration commands:
  <1-2147483647>  Sequence Number
  default        Set a command to its defaults
  deny            Specify packets to reject
  dynamic        Specify a DYNAMIC list of PERMITs or DENYs
  evaluate        Evaluate an access list
  exit            Exit from access-list configuration mode
  no              Negate a command or set its defaults
  permit          Specify packets to forward
  remark          Access list entry comment
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实例:
Gateway(config-ext-nacl)#21 permit tcp host 10.1.1.2 host 10.1.1.1 eq 80
ACL重新排序:

实例:
Gateway(config)#ip access-list resequence 100(名字) 10(开始) 10(递增)