思科cisco

## 思科交换机基本配置命令

### 开局配置常用命令
```
switch> enable  //进入特权模式
switch#
Switch#show run  //查看当前配置
switch＃configure terminal  //进入全局配置模式
switch(conf)#
switch(conf)#hostname Local_SW01  //修改交换机命名为“Local_SW01”
Local_SW01(conf)#

Switch#conf t
Switch(config)#ip routing //开启三层交换机的路由功能
Switch(config)#no vlan 12  //删除vlan
Switch(config)#vlan 20    //新建vlan
Switch(config-vlan)#exit
Switch(config)#interface vlan 20  //创建虚拟接口vlan20
Switch(config-if)#ip address 172.16.20.1 255.255.255.0  //配置vlan20的虚拟接口ip地址
Switch(config-if)#exit
Switch(config)#

Switch(config)#interface GigabitEthernet2/0/1  //进入接口配置模式

Switch(config-if)#switchport mode ?
  access        Set trunking mode to ACCESS unconditionally
  dot1q-tunnel  set trunking mode to TUNNEL unconditionally
  dynamic       Set trunking mode to dynamically negotiate access or trunk mode
  private-vlan  Set private-vlan mode
  trunk         Set trunking mode to TRUNK unconditionally

Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 20
Switch(config-if)#switchport access vlan 30  //修改vlan
Switch(config-if)#exit

Switch(config)#ip rou?
route  routing
Switch(config)#ip route 0.0.0.0 0.0.0.0 192.168.1.1  //配置路由

Switch(config)#end //退出到特权模式
Switch#write //保存配置

```

### 查看端口和vlan
```
Switch#show vlan
Switch#show vlan brief

Switch# show interfaces vlan 12

Switch#show interfaces GigabitEthernet 2/0/1
GigabitEthernet2/0/1 is up, line protocol is up (connected)  //端口up、down
  Hardware is Gigabit Ethernet, address is 001b.d5cc.2e81 (bia 001b.d5cc.2e81)
  MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,
     reliability 255/255, txload 10/255, rxload 1/255
  Encapsulation ARPA, loopback not set
  Keepalive set (10 sec)
  Full-duplex, 1000Mb/s, media type is 10/100/1000BaseTX
  input flow-control is off, output flow-control is unsupported
  ARP type: ARPA, ARP Timeout 04:00:00
  Last input never, output 00:00:01, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 2023
  Queueing strategy: fifo
  Output queue: 0/40 (size/max)
  5 minute input rate 1594000 bits/sec, 1691 packets/sec
  5 minute output rate 40060000 bits/sec, 3545 packets/sec
     10025156880 packets input, 9873480971526 bytes, 0 no buffer
     Received 460558 broadcasts (2 multicasts)
     0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored
     0 watchdog, 2 multicast, 0 pause input
     0 input packets with dribble condition detected
     7144348210 packets output, 3796453272875 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 babbles, 0 late collision, 0 deferred
     0 lost carrier, 0 no carrier, 0 PAUSE output
     0 output buffer failures, 0 output buffers swapped out
Switch#
```
### 命令提示
"tab"键补全命令，如没补上可能是能匹配到多个，后面跟"?"打印提示。
```
switch> enable  //进入特权模式
switch＃conf t  //进入全局配置模式
switch(conf)#

退出
Switch(config)#exit //退出到下一级别
Switch(config)#end //退出到特权模式

Switch#show run  //查看当前配置

保存配置
switch#write
```