VTP协议
VTP协议
1.vtp协议：VTP（VLAN Trunking Protocol）：是VLAN中继协议，也被称为虚拟局域网干道协议。它是思科私有协议。作用是十几台交换机在企业网中，配置VLAN工作量大，可以使用VTP协议，把一台交换机配置成VTP Server, 其余交换机配置成VTP Client,这样他们可以自动学习到server 上的VLAN 信息。
2.VTP模式:VTP协议分为三种模式
第一种模式为server模式 其的作用是让别人来学习其的vlan
第二种模式为client模式 其的作用是学习server的vlan
第三种模式为transparent模式 其的作用是转发vtp信息 然后自己不学习vtp
实例：我们使用三台交换机 然后一台客户端 一台服务端 还有一台为transparent模式
SW1为服务端 SW2为透明模式 SW3为客户端
SW1:
Switch>en
Switch#conf t
Switch(config)#int f0/1
Switch(config-if)#sw mode trunk
Switch(config-if)#exit
Switch(config)#vtp mode server
Device mode already VTP SERVER.
Switch(config)#vtp domain skills
Changing VTP domain name from NULL to skills
Switch(config)#vtp password skills
Setting device VLAN database password to skills
Switch(config)#vlan 10
Switch(config-vlan)#vlan 20
Switch(config-vlan)#exit
Switch(config)#do show vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/2, Fa0/3, Fa0/4, Fa0/5
Fa0/6, Fa0/7, Fa0/8, Fa0/9
Fa0/10, Fa0/11, Fa0/12, Fa0/13
Fa0/14, Fa0/15, Fa0/16, Fa0/17
Fa0/18, Fa0/19, Fa0/20, Fa0/21
Fa0/22, Fa0/23, Fa0/24, Gig0/1
Gig0/2
10 VLAN0010 active
20 VLAN0020 active
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
10 enet 100010 1500 - - - - - 0 0
20 enet 100020 1500 - - - - - 0 0
Switch(config)#
SW2:
Switch>en
Switch#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#int range f0/1-2
Switch(config-if-range)#sw mode trunk
Switch(config-if-range)#exit
Switch(config)#vtp mode tra
Switch(config)#vtp mode transparent
Setting device to VTP TRANSPARENT mode.
Switch(config)#vtp domain skills
Domain name already set to skills.
Switch(config)#vtp password skills
Setting device VLAN database password to skills
Switch(config)#do show vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/3, Fa0/4, Fa0/5, Fa0/6
Fa0/7, Fa0/8, Fa0/9, Fa0/10
Fa0/11, Fa0/12, Fa0/13, Fa0/14
Fa0/15, Fa0/16, Fa0/17, Fa0/18
Fa0/19, Fa0/20, Fa0/21, Fa0/22
Fa0/23, Fa0/24, Gig0/1, Gig0/2
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
1002 fddi 101002 1500 - - - - - 0 0
1003 tr 101003 1500 - - - - - 0 0
1004 fdnet 101004 1500 - - - ieee - 0 0
1005 trnet 101005 1500 - - - ibm - 0 0
Switch(config)#
SW3:
Switch>en
Switch#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#int f0/1
Switch(config-if)#sw mode trunk
Switch(config-if)#exit
Switch(config)#vtp mode client
Switch(config)#vtp domain skills
Switch(config)#vtp password skills
Setting device VLAN database password to skills
Switch(config)#do show vlan
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/2, Fa0/3, Fa0/4, Fa0/5
Fa0/6, Fa0/7, Fa0/8, Fa0/9
Fa0/10, Fa0/11, Fa0/12, Fa0/13
Fa0/14, Fa0/15, Fa0/16, Fa0/17
Fa0/18, Fa0/19, Fa0/20, Fa0/21
Fa0/22, Fa0/23, Fa0/24, Gig0/1
Gig0/2
10 VLAN0010 active
20 VLAN0020 active
1002 fddi-default act/unsup
1003 token-ring-default act/unsup
1004 fddinet-default act/unsup
1005 trnet-default act/unsup
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
---- ----- ---------- ----- ------ ------ -------- ---- -------- ------ ------
1 enet 100001 1500 - - - - - 0 0
10 enet 100010 1500 - - - - - 0 0
20 enet 100020 1500 - - - - - 0 0
Switch(config)#