cisco交換機DHCP分配靜態IP

這裏我們以vlan31進行描述

ip dhcp pool vlan31
network 172.31.255.0 255.255.255.0
default-router 172.31.255.254
dns-server 202.96.209.133 8.8.8.8

1、先將特殊IP地址從dhcp中剔除掉，以免後面造成ip地址衝突
ip dhcp excluded-address 172.31.255.1
ip dhcp excluded-address 172.31.255.100

2、編寫一個靜態IP地址的pool
ip dhcp pool static_vlan31_1
host 172.31.255.100 255.255.255.0
client-identifier 015c.f9dd.48c0.da //mac前面要補“01”
dns-server 202.96.209.133 8.8.8.8
default-router 172.31.255.254
lease infinite //永久

3、如果要立即生效，需要清空自動分配ip的緩存
dmz_cisco3750#clear ip dhcp binding *
dmz_cisco3750#show ip dhcp binding
IP address Client-ID/ Lease expiration Type
Hardware address
172.31.255.100 015c.f9dd.48c0.da Infinite Manual
dmz_cisco3750#

4、爲了避免其他用戶私自修改保留的靜態IP地址，需要再增加arp綁定信息
arp 172.31.255.100 5cf9.dd48.c0da arpa
具體命令如下:
dmz_cisco3750(config)#do show arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 172.31.255.100 0 5cf9.dd48.c0da ARPA Vlan31
dmz_cisco3750(config)#arp 172.31.255.100 5cf9.dd48.c0da arpa
dmz_cisco3750(config)#do show arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 172.31.255.100 - 5cf9.dd48.c0da ARPA

5、驗證IP地址