2. interface

2. interface
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2.1. show interfaces status

show interfaces status

2.2. ip address

DHCP

ip address dhcp

指定IP地址

ip address 192.20.135.21 255.255.255.0

2.3. 配置連接埠速率及雙工模式

Step 1          configure terminal         進入配置狀態.
Step 2          interface interface-id         進入連接埠配置狀態.
Step 3          speed {10 | 100 | 1000 | auto | nonegotiate}    設置連接埠速率注   1000 只工作在千兆口. GBIC模組只工作在1000 Mbps下. nonegotiate 只能在這些GBIC上用 1000BASE-SX, -LX, and -ZX GBIC.
Step 4          duplex {auto | full | half}         設置全雙工或半雙工.
Step 5          end        退出
Step 6          show interfaces interface-id         顯示有關配置情況
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

2.4. range

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

同時選擇多個連接埠

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

2.5. 連接埠隔離

Switch(config)# interface 連接埠號
Switch(config-if)# switchitchport protected //開啟連接埠保護功能

註：思科個別型號交換機採用PVLAN來實現連接埠保護功能