2003, Cisco Systems, Inc. All rights reserved.BSCI 2.01-1 2003, Cisco Systems, Inc. All rights reserved. 2002, Cisco Systems, Inc. All rights reserved.2端口安全 2003, Cisco Systems, Inc. All rights reserved.BSCI 2.01-3风风暴控制 2003, Cisco Systems, Inc. All rights reserved.BSCI 2.01-4端口保护护所有启用端口保护的端口之间不能直接进行2层的通讯，要通讯必须经过三层设备， 而与普通端口之间的通讯则正常。（用于交换机连接几个单独体时）(config-if)# switchport protected 2003, Cisco Systems, Inc. All rights reserved.BSCI 2.01-5MAC地址与端口绑绑定