配置端口
配置一组端口
命令 目的
Step 1 configure terminal 进入配置状态
Step 2 interface range {port-range} 进入组配置状态
Step 3 可以使用平时的端口配置命令进行配置
Step 4 end 退回
Step 5 show interfaces [interface-id] 验证配置
Step 6 copy running-config startup-config 保存
当使用interface range命令时有如下的规则:
· 有效的组范围:
o vlan从1 到4094
o fastethernet 槽位/{first port} - {last port}, 槽位为0
o gigabitethernet槽位/{first port} - {last port},槽位为0
o port-channel port-channel-number - port-channel-number, port-channel号从1
到64
· 端口号之间需要加入空格,如:interface range fastethernet 0/1 - 5 是有效的
,而interface range fastethernet 0/1-5 是无效的.
· interface range 命令只能配置已经存在的interface vlan
· 所有在同一组的端口必须是相同类别的。
见以下例子:
Switch# configure terminal
Switch(config)# interface range fastethernet0/1 - 5
Switch(config-if-range)# no shutdown
Switch(config-if-range)#
*Oct 6 08:24:35: %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state
to up
*Oct 6 08:24:35: %LINK-3-UPDOWN: Interface FastEthernet0/2, changed state
to up
*Oct 6 08:24:35: %LINK-3-UPDOWN: Interface FastEthernet0/3, changed state
to up
*Oct 6 08:24:35: %LINK-3-UPDOWN: Interface FastEthernet0/4, changed state
to up
*Oct 6 08:24:35: %LINK-3-UPDOWN: Interface FastEthernet0/5, changed state
to up
*Oct 6 08:24:36: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/05,
changed state to up
*Oct 6 08:24:36: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/3, changed
state to up
*Oct 6 08:24:36: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/4, changed
state to up
以下的例子显示使用句号来配置不同类型端口的组:
Switch# configure terminal
Switch(config)# interface range fastethernet0/1 - 3, gigabitethernet0/1 - 2
Switch(config-if-range)# no shutdown
Switch(config-if-range)#
*Oct 6 08:29:28: %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state
to up
*Oct 6 08:29:28: %LINK-3-UPDOWN: Interface FastEthernet0/2, changed state
to up
*Oct 6 08:29:28: %LINK-3-UPDOWN: Interface FastEthernet0/3, changed state
to up
*Oct 6 08:29:28: %LINK-3-UPDOWN: Interface GigabitEthernet0/1, changed
state to up
*Oct 6 08:29:28: %LINK-3-UPDOWN: Interface GigabitEthernet0/2, changed
state to up
*Oct 6 08:29:29: %LINEPROTO-5-UPDOWN: Line protocol on Interface
GigabitEthernet0/ 1,
changed state to up
*Oct 6 08:29:29: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/ 2,
changed state to up
*Oct 6 08:29:29: %LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/ 3,
changed state to up
配置二层端口
2950的所有端口缺省的端口都是二层口,如果此端口已经配置成三层端口的话,则需要
用switchport来使其成为二层端口。
配置端口速率及双工模式
可以配置快速以太口的速率为10/100Mbps及千兆以太口的速率为10/100/1000-Mbps; 但
对于GBIC端口则不能配置速率及双工模式,有时可以配置nonegotiate,当需要联接不支
持自适应的其它千兆端口时
命令 目的
Step 1 configure terminal 进入配置状态.
Step 2 interface interface-id 进入端口配置状态.
Step 3 speed {10 | 100 | 1000 | auto | nonegotiate} 设置端口速率 注
1000 只工作在千兆口. GBIC模块只工作在1000 Mbps下. nonegotiate 只能在这些GBIC
上用 1000BASE-SX, -LX, and -ZX GBIC.
Step 4 duplex {auto | full | half} 设置全双工或半双工.
Step 5 end 退出
Step 6 show interfaces interface-id 显示有关配置情况
Step 7 copy running-config startup-config 保存
Switch# configure terminal
Switch(config)# interface fastethernet0/3
Switch(config-if)# speed 10
Switch(config-if)# duplex half
端口描述
命令 目的
Step 1 configure terminal 进入配置模式
Step 2 interface interface-id 进入要加入描述的端口
Step 3 description string 加入描述 (最多240个字符).
Step 4 end 退回.
Step 5 show interfaces interface-id descriptionorshow running-config
验证.
Step 6 copy running-config startup-config 保存
Use the no description interface configuration command to delete the
description.
This example shows how to add a description on Fast Ethernet interface 0/4
and to verify the description:
Switch# config terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)# interface fastethernet0/4
Switch(config-if)# description Connects to Marketing
Switch(config-if)# end
Switch# show interfaces fastethernet0/4 description
Interface Status Protocol Description
Fa0/4 up down Connects to Marketing
监控及维护端口
监控端口和控制器的状态
主要命令见下表:
Show Commands for Interfaces Command 目的
show interfaces [interface-id] 显示所有端口或某一端口的状态和配置.
show interfaces interface-id status [err-disabled] 显示一系列端口的状态或错
误-关闭的状态
show interfaces [interface-id] switchport 显示二层端口的状态,可以用来决定
此口是否为二层或三层口。
show interfaces [interface-id] description 显示端口描述
show running-config interface [interface-id] 显示当前配置中的端口配置情况
show version 显示软硬件等情况
举例如下:
Switch# show interfaces status
Port Name Status Vlan Duplex Speed Type
Gi0/1 connected routed a-full a-100
10/100/1000Base
TX
Gi0/2 wce server 20.20.2 disabled routed auto auto
10/100/1000Base TX
Gi0/3 ip wccp web-cache notconnect routed auto auto
10/100/1000Base TX
Gi0/4 notconnect routed auto auto
10/100/1000Base TX
Gi0/5 notconnect routed auto auto
10/100/1000Base TX
Gi0/6 disabled routed auto auto
10/100/1000Base TX
Gi0/7 disabled routed auto auto
10/100/1000Base TX
Gi0/8 disabled routed auto 100
10/100/1000Base TX
Gi0/9 notconnect routed auto auto
10/100/1000Base TX
Gi0/10 notconnect routed auto auto
10/100/1000Base TX
Gi0/11 disabled routed auto auto unknown
Gi0/12 notconnect routed auto auto unknown