标签：cisco trunk
一 VLAN（虚拟局域网）配置
创建VLAN：
J2(config)#vlan 100
J2(config-vlan)#name vlan100
J2(config-vlan)#vlan 99
J2(config-vlan)#name vlan99
查看VLAN:
J2#sh vlan-switch
删除VLAN：
J2(config)#no vlan 99
把端口加入vlan:
J2(config)#int range f1/1 - 12
J2(config-if-range)#switchport mode access
J2(config-if-range)#switchport access vlan 100
查看某个具体vlan
J2#show vlan-switch id 100
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
100 vlan100 active Fa1/1, Fa1/2, Fa1/3, Fa1/4
Fa1/5, Fa1/6, Fa1/7, Fa1/8
Fa1/9, Fa1/10, Fa1/11, Fa1/12
VLAN Type SAID MTU Parent RingNo BridgeNo Stp BrdgMode Trans1 Trans2
二 Trunk：在交换网络中，链路有两种类型，接入链路（通常属于一个VLAN，如主机和交换机之间的链路）和中继链路（Trunk：可以承载多个VLAN，实现相同VLAN跨交换机通信）
1 进入接口模式，并选择封装类型：
J2(config)#int range f1/1 , f1/3
J2(config-if-range)#switchport trunk encapsulation dot1q
2 将端口配置为Trunk
J2(config-if-range)#switchport mode trunk
在Trunk上添加VLAN:
J2(config-if-range)#switchport trunk allowed vlan add 50
J2(config-if-range)#switchport trunk allowed vlan add 60
在Trunk上移除VLAN:
J2(config-if-range)#switchport trunk allowed vlan remove 50
查看接口模式：
J2#sh int f1/1 switchport
Name: Fa1/1
Switchport: Enabled
Administrative Mode: trunk
Operational Mode: trunk
Administrative Trunking Encapsulation: dot1q
Operational Trunking Encapsulation: dot1q
Negotiation of Trunking: Disabled
Access Mode VLAN: 0 ((Inactive))
Trunking Native Mode VLAN: 1 (default)
Trunking VLANs Enabled: 1-49,51-1005
Trunking VLANs Active: 1,60,100
Priority for untagged frames: 0
Override vlan tag priority: FALSE
Voice VLAN: none
Appliance trust: none
验证接口的Trunk配置：
J2#show int f1/1 trunk
Port Mode Encapsulation Status Native vlan
Fa1/1 on 802.1q trunking 1
Port Vlans allowed on trunk
Fa1/1 1-49,51-1005
Port Vlans allowed and active in management domain
Fa1/1 1,60,100
Port Vlans in spanning tree forwarding state and not pruned
Fa1/1 1,60,100
三 以太网通道配置：
前提：
参与捆绑的端口同属一个VLAN，或把它们全部配置为中继端口
所有参与捆绑的端口物理参数应该相同，如相同的速率和双工模式
配置：
J2(config)#int range f1/3 - 4
J2(config-if-range)#channel-group 1 mode on
J2#sh etherchannel 1 summary
Flags: D - down P - in port-channel
I - stand-alone s - suspended
R - Layer3 S - Layer2
U - in use
Group Port-channel Ports
-----+------------+-----------------------------------------------------------
1 Po1(SD) Fa1/3(D) Fa1/4(D)
本文出自 “一万年太久，只争朝夕” 博客，请务必保留此出处http://zengwj1949.blog.51cto.com/10747365/1922218
标签：cisco trunk
原文地址：http://zengwj1949.blog.51cto.com/10747365/1922218
