第一话:VTP -配置实例

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实验环境的创建步骤:++++++++++++++++++++++++++++++++++++++++++++++++++sw 0++++++++++++++++++++++++++++++++++++++++++++++++++enconf tno ip do loline c 0exec-t 0 0logg syncexitin range f0/1 - 3sw m tendvlan dvtp domain gaovtp password 123vlan 10vlan 20vlan 30+++++++++++++++++++++++++++++++++++++++++++++++++++sw 1+++++++++++++++++++++++++++++++++++++++++++++++++++enconf tno ip do loline c 0exec-t 0 0logg syncexitin f0/1sw m tendvlan dvtp domain gaovtp password 123vtp client (有的版本使用vtp mode clientexitenconf tin f0/15sw a v 10++++++++++++++++++++++++++++++++++++++++++++++++++++sw 2++++++++++++++++++++++++++++++++++++++++++++++++++++enconf tno ip do loline c 0exec-t 0 0logg syncexit in f0/2sw m tendvlan dvtp domain gaovtp password 123vtp clientexitenconf tin f0/15sw a v 10+++++++++++++++++++++++++++++++++++++++++++++++++++++sw 3+++++++++++++++++++++++++++++++++++++++++++++++++++++enconf tno ip do loline c 0exec-t 0 0logg syncexitin f0/3sw m tendvlan dvtp domain gaovtp password 123vtp transparentvlan 20exitenconf tin f0/15sw a v 20+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++◆Vtp (vlan trunk protocol)实现单点访问控制vlan信息的作用。唯cisco私有。◆Vtp消息使用二层frame, 组播地址: 01-00-0c-cc-cc-cc。◆Vtp 使用条件:交换机直连,同域,同密,拥有中继端口(直连端口)◆Vtp 模式:Server:在域中至少有一台交换处于此模式。ClientTransparent 此模式在VTP 不同版本表现是不同的。第二版本使用命令:vtp version 2 vtp v2-mode 启用(只需要在server交换上打命令)。其与一版本最大的不同在于:支持令牌环交换;在转发vtp消息时,不检查版本号与域名。Vtp 消息类型:汇总通告:包含目前的VTP域名与配置修改编号。配置修改编号的范围(0~2^32 - 1)。每300秒发送一次,当网络拓扑发生变化时也会发送。子集通告:包含vlan 配置的详细信息。通告请求:发送条件1. 交换机重起后 2 . VTP 域名变化后 3 .交换机接受到修改配置编号比自己高的汇总通告。◆    交换机修改配置编号重设为0的方法:1 . 更改交换机的域名 2.将交换机的模式该为透明模式后再该为其他的模式vtp 修剪 在服务器上打 vtp pruning 可减少不必要的广播。Switch#SHOW  VTP  STATUSVTP Version                     : 2Configuration Revision          : 0Maximum VLANs supported locally : 64Number of existing VLANs        : 5VTP Operating Mode              : ServerVTP Domain Name                 : VTP Pruning Mode                : DisabledVTP V2 Mode                     : DisabledVTP Traps Generation            : DisabledMD5 digest                      : 0x7D 0x5A 0xA6 0x0E 0x9A 0x72 0xA0 0x3A Configuration last modified by 0.0.0.0 at 0-0-00 00:00:00Local updater ID is 0.0.0.0 (no valid interface found)