cisco交换机DHCP分配静态IP

这里我们以vlan31进行描述

ip dhcp pool vlan31network 172.31.255.0 255.255.255.0default-router 172.31.255.254 dns-server 202.96.209.133 8.8.8.8

1、先将特殊IP地址从dhcp中剔除掉，以免后面造成ip地址冲突ip dhcp excluded-address 172.31.255.1ip dhcp excluded-address 172.31.255.100

2、编写一个静态IP地址的poolip dhcp pool static_vlan31_1host 172.31.255.100 255.255.255.0client-identifier 015c.f9dd.48c0.da //mac前面要补“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，需要清空自动分配ip的缓存dmz_cisco3750#clear ip dhcp binding *dmz_cisco3750#show ip dhcp binding IP address Client-ID/ Lease expiration TypeHardware address172.31.255.100 015c.f9dd.48c0.da Infinite Manualdmz_cisco3750#

4、为了避免其他用户私自修改保留的静态IP地址，需要再增加arp绑定信息arp 172.31.255.100 5cf9.dd48.c0da arpa具体命令如下:dmz_cisco3750(config)#do show arpProtocol Address Age (min) Hardware Addr Type InterfaceInternet 172.31.255.100 0 5cf9.dd48.c0da ARPA Vlan31dmz_cisco3750(config)#arp 172.31.255.100 5cf9.dd48.c0da arpadmz_cisco3750(config)#do show arp Protocol Address Age (min) Hardware Addr Type InterfaceInternet 172.31.255.100 - 5cf9.dd48.c0da ARPA

5、验证IP地址