> For the complete documentation index, see [llms.txt](https://anida-huang.gitbook.io/computer-network/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://anida-huang.gitbook.io/computer-network/qi-zhong/20201007-introduction-dhcp.md).

# 20201007 Introduction DHCP

## 課堂練習

### Part 01.

![](/files/-MLSqwI2LE5C2PMycuse)

![](/files/-MLODvPOvogNaGsFtm9g)

{% tabs %}
{% tab title="S1" %}

```
conf t
```

```
hostname R1
```

```
do writ
```

```
int s1/0
```

```
ip addr 12.1.1.1 255.255.255.252
```

```
no shut
```

```
clock rate 64000
```

![](/files/-MLOFQGgGSqRtbvYCzQT)
{% endtab %}

{% tab title="S2" %}

```
conf t
```

```
hostname R2
```

```
do writ
```

```
int s1/0
```

```
ip addr 12.1.1.2 255.255.255.252
```

```
no shut
```

```
clock rate 64000
```

![](/files/-MLOGfcPQL7EnSUW9Uva)
{% endtab %}
{% endtabs %}

```
do sh ip int brief
```

```
exit
```

{% tabs %}
{% tab title="R1" %}
![](/files/-MLOHBAeQa5J0qaku3wo)

```
int lo 0
```

```
ip addr 1.1.1.1 255.255.255.255
```

```
int lo 0
```

![](/files/-MLOJ9qkXeVFY1dfLM4S)

```
do sh ip int brief
```

![](/files/-MLOJoWv1YbhSJtMwzB_)
{% endtab %}

{% tab title="R2" %}
![](/files/-MLOHPYIzpRDbl9L-4xN)

```
int lo 0
```

```
ip addr 2.2.2.2 255.255.255.255
```

```
no shut
```

![](/files/-MLOJOTvb78iAXIQyDyU)

```
do sh ip int brief
```

![](/files/-MLOK1rladMCW5dFn2TZ)
{% endtab %}
{% endtabs %}

```
exit
```

```
do sh ip ro
```

{% tabs %}
{% tab title="R1" %}
![](/files/-MLRnnkvfA95tTnqTMCp)

```
do sh ip ro 12.1.1.2
```

![](/files/-MLRoerOfNOQ02o3lEgh)

```
ip route 2.2.2.0 255.255.255.0 ?
```

![](/files/-MLRpFyY00ABL19rssVC)

```
ip route 2.2.2.0 255.255.255.0 s1/0 12.1.1.2
```

```
do sh ip ro
```

![](/files/-MLRqabjypleHaSabcsz)

```
do sh ip ro 2.2.2.2
```

![](/files/-MLRrk-aeinXhnclq8f_)

```
do ping 2.2.2.2
```

![](/files/-MLRs1wJoiLVud2r4Lds)

```
do ping 2.2.2.2 source 1.1.1.1
```

![](/files/-MLRsprjL08rRKPSuv6a)
{% endtab %}

{% tab title="R2" %}
![](/files/-MLRnw0yG_CdLRWu-Zu-)

```
do sh ip ro 12.1.1.1
```

![](/files/-MLRoY195pnoq4vi59OW)

```
ip route 1.1.1.0 255.255.255.0 ?
```

![](/files/-MLRpZlvSWnRNxtCx-ZE)

```
ip route 1.1.1.0 255.255.255.0 s1/0 12.1.1.1
```

```
do sh ip ro
```

![](/files/-MLRqku1MNXLxKml36oj)

```
do sh ip ro 1.1.1.1
```

![](/files/-MLRr_30lgVFqt9KHcGW)

```
do ping 1.1.1.1
```

![](/files/-MLRsCImXMSYrEfytmVL)

```
do ping 1.1.1.1 source 2.2.2.2
```

![](/files/-MLRseybKJ5Foplyxp-v)
{% endtab %}
{% endtabs %}

### Part 02. Ping IP Address

![](/files/-MLSr3ECc6Ddl0xhV71_)

{% tabs %}
{% tab title="R3" %}

```
hostname R3
```

```
do writ
```

```
int e0/0
```

```
ip addr 192.168.1.1 255.255.255.0
```

```
no shut
```

```
exit
```

```
int lo 0
```

```
ip addr 3.3.3.3 255.255.255.255
```

```
no shut
```

```
do sh ip int brief
```

```
exit
```

![](/files/-MLSgVOAYZUgM5khngOo)

```
ip route 4.4.4.0 255.255.255.0 192.168.1.2
```

```
do sh ip ro
```

![](/files/-MLSjrEJjxsojMGRk8gk)

```
do sh ip ro 4.4.4.4
```

```
do ping 4.4.4.4
```

![](/files/-MLSkxYdU2R8MmG5z_lc)
{% endtab %}

{% tab title="R4" %}

```
hostname R4
```

```
do writ
```

```
int e0/0
```

```
ip addr 192.168.1.2 255.255.255.0
```

```
no shut
```

```
exit
```

```
int lo 0
```

```
ip addr 4.4.4.4 255.255.255.255
```

```
no shut
```

```
do sh ip int brief
```

```
exit
```

![](/files/-MLSho5jflTH36NiPVpn)

```
ip route 5.5.5.0 255.255.255.0 192.168.1.3
```

```
do sh ip ro
```

![](/files/-MLSlXt79jbk9P0bi3fF)

```
do sh ip ro 5.5.5.5
```

```
do ping 5.5.5.5
```

![](/files/-MLSlz1mmmo0tWLrp97H)
{% endtab %}

{% tab title="R5" %}

```
hostname R5
```

```
do wirt
```

```
int e0/0
```

```
ip addr 192.168.1.3 255.255.255.0
```

```
no shut
```

```
exit
```

```
int lo 0
```

```
ip addr 5.5.5.5 255.255.255.255
```

```
no shut
```

```
do sh ip int brief
```

![](/files/-MLSibujw4EU-5ER308k)

```
exit
```

```
ip route 3.3.3.0 255.255.255.0 192.168.1.1
```

```
do sh ip ro
```

![](/files/-MLSmh_TmPJVROK8oYUC)

```
do sh ip ro 3.3.3.3
```

```
do ping 3.3.3.3
```

![](/files/-MLSnCv6dI6iCDv-dwbv)
{% endtab %}
{% endtabs %}

### Part 03. Setting DHCP

![](/files/-MLT6fV4RMRlgx9_oj86)

{% tabs %}
{% tab title="R1" %}

```
hostname R1
```

```
do writ
```

```
int e0/0
```

```
ip addr 12.1.1.1 255.255.255.0
```

```
no shut
```

```
int e0/1
```

```
ip addr 192.168.1.1 255.255.255.0
```

```
no shut
```

```
exit
```

![](/files/-MLSuvW6xfBeHk35TIHB)

```
ip dhcp pool DHCP
```

```
network 192.168.1.0 /24
```

```
default-router 192.168.1.1
```

```
dns-server 8.8.8.8
```

![](/files/-MLSviyITMMQTUQX4dox)

```
ip route 23.1.1.0 255.255.255.0 e0/0 12.1.1.2
```

![](/files/-MLT3AVbpT57oFSQtf1p)

```
ip route 192.168.2.0 255.255.255.0 e0/0 12.1.1.2
```

![](/files/-MLT4Bk75l3wrKSHks3i)
{% endtab %}

{% tab title="R3" %}

```
hostname R3
```

```
do writ
```

```
int e0/0
```

```
ip addr 23.1.1.3 255.255.255.0
```

```
no shut
```

```
int e0/1
```

```
ip addr 192.168.2.1 255.255.255.0
```

```
no shut
```

![](/files/-MLSxouypBYRWmcY9nwa)

```
exit
```

```
ip dhcp pool DHCP2
```

```
network 192.168.2.0 /24
```

```
default-router 192.168.2.1
```

```
dns-server 8.8.8.8
```

![](/files/-MLSz-BfMXwM4023j0CK)

```
ip route 192.168.1.0 255.255.255.0 e0/0 23.1.1.2
```

![](/files/-MLT3MP9_NnlUrhcXtIF)
{% endtab %}

{% tab title="R2" %}

```
hostname R2
```

```
do writ
```

```
int e0/0
```

```
ip addr 12.1.1.2 255.255.255.0
```

```
no shut
```

```
int e0/1
```

```
ip addr 23.1.1.2 255.255.255.0
```

```
no shut
```

![](/files/-MLT-8V3cr0NszkU76ik)

```
ip route 192.168.1.0 255.255.255.0 e0/0 12.1.1.1
```

![](/files/-MLT1s3mQmnrzkNHwalR)

```
ip route 192.168.2.0 255.255.255.0 e0/0 23.1.1.3
```

![](/files/-MLT5-egqJJzkydlgw1F)

```
ip route 192.168.2.0 255.255.255.0 e0/1 23.1.1.3
```

![](/files/-MLT6K796ybxVfOGIiDr)
{% endtab %}
{% endtabs %}

{% tabs %}
{% tab title="VPC\[1]" %}

```
ip dhcp
```

![](/files/-MLSwMTyRoT4S5Kq0Tvg)

```
sh ip
```

![](/files/-MLSwZiU-jtgP9RxhIcN)

```
ping 192.168.1.1
```

![](/files/-MLSwpWbwbgVRY5EWx15)

#### 設定完 R3 和 R2 的 IP 後：

```
ping 12.1.1.1
```

![](/files/-MLT0BdDVbF8keN70ZXv)

```
ping 12.1.1.2
```

![](/files/-MLT0mavnqTuACD9fdwm)

#### 將 R2 設置 router 後重 ping 12.1.1.2：

```
ping 12.1.1.2
```

![](/files/-MLT1xoEEAwSuOi2TwXq)

```
ping 23.1.1.2
```

![](/files/-MLT297VVFSMr6mHCAJE)

```
ping 23.1.1.3
```

```
ping 192.168.2.1
```

![](/files/-MLT43vAPFNutKRSwinc)

#### R3 重設後：

```
ping 192.168.2.1
```

![](/files/-MLT4NL4Vwu1q9CW8AfM)

#### R2重設後：

```
ping 192.168.2.2
```

![](/files/-MLT61cLdCOxKxCEp9-D)
{% endtab %}

{% tab title="VPC\[2]" %}

```
ip dhcp
```

```
sh ip
```

```
ping 192.168.2.1
```

![](/files/-MLSzWcrONQTjoIsmcvb)
{% endtab %}
{% endtabs %}

### Part 04.

![](/files/-MLT9rmwgaXhUJJ2BKNG)

{% tabs %}
{% tab title="R1" %}

```
hostname R1
```

```
do writ
```

```
int e0/0
```

```
ip addr 12.1.1.1 255.255.255.0
```

```
no shut
```

![](/files/-MLTAY3dptvGADvVrTr3)

```
ip route 0.0.0.0 0.0.0.0 e0/0 12.1.1.2
```

```
do sh ip ro
```

![](/files/-MLTCiwy2fgzQDKrh2c7)

```
do ping 3.3.3.3
```

![](/files/-MLTD4PEY83y-O_eVfr1)

```
do sh ip static ro
```

![](/files/-MLTDXPMtlovBeLWMpBl)
{% endtab %}

{% tab title="R2" %}

```
hostname R2
```

```
do writ
```

```
int e0/0
```

```
ip addr 12.1.1.2 255.255.255.0
```

```
no shut
```

![](/files/-MLTB5xjJqDTlUU1gi5A)

```
int lo 0
```

```
ip addr 2.2.2.2 255.255.255.255
```

```
int lo 1
```

```
ip addr 3.3.3.3 255.255.255.255
```

![](/files/-MLTBx2s8BNPEts4S3HE)
{% endtab %}
{% endtabs %}