或者通过以下命令来验证
# dhclient -d //验证命令
Internet Systems Consortium DHCP Client 4.1.1-P1
Copyright 2004-2010 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/
Listening on LPF/eth0/00:0c:29:49:ba:0a //以下是DHCP工作原理
Sending on LPF/eth0/00:0c:29:49:ba:0a
Sending on Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7 (xid=0x6ecab92b) //寻找DHCP服务器
DHCPOFFER from 192.168.4.5 //DHCP服务器提供IP地址
DHCPREQUEST on eth0 to 255.255.255.255 port 67 (xid=0x6ecab92b) //请求使用
DHCPACK from 192.168.4.5 (xid=0x6ecab92b) //同意使用
bound to 192.168.4.20 -- renewal in 3110 seconds.
故障排除:
现象1.
Jan 27 13:07:55 srv5 dhcpd: ^
Jan 27 13:07:55 srv5 dhcpd: /etc/dhcp/dhcpd.conf line 13: unexpected end of file
Jan 27 13:07:55 srv5 dhcpd: range 192.168.4.120 192.168.4.150;
Jan 27 13:07:55 srv5 dhcpd: ^
Jan 27 13:07:55 srv5 dhcpd: Configuration file errors encountered -- exiting
原因:编辑配置文件是缺少大括号
故障2
Jan 27 13:10:07 srv5 dhcpd: ^
Jan 27 13:10:07 srv5 dhcpd: /etc/dhcp/dhcpd.conf line 11: semicolon expected.
Jan 27 13:10:07 srv5 dhcpd: opton domain-name-server
Jan 27 13:10:07 srv5 dhcpd: ^
Jan 27 13:10:07 srv5 dhcpd: Configuration file errors encountered -- exiting
原因:参数配置错误,少了一个S。正确参数为:opton domain-name-servers
故障3
Jan 27 13:15:58 srv5 dhcpd: default-lesae-time 7200;
Jan 27 13:15:58 srv5 dhcpd: ^
Jan 27 13:15:58 srv5 dhcpd: Configuration file errors encountered -- exiting
原因:参数配置错误,正确参数为:default-lease-time
总结: