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DHCP 不起作用

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DHCP 不起作用

我使用的是 14.04 并安装isc-dhcp-server在我的 Ubuntu 中。这是我的 DHCP 配置：

INTERFACES="eth0"

allow booting;
allow bootp;

subnet 192.168.1.0 netmask 255.255.255.0 {
    range dynamic-bootp 192.168.1.10 192.168.1.200;
    option broadcast-address 192.168.1.255;
    option routers 192.168.1.1;
    option subnet-mask 255.255.255.0;
    filename "/var/lib/tftpboot/pxelinux.0";
}

当我检查这个时：

ashokkrishna@ashokkrishna-Lenovo-B560:~$ dhcpd -t /etc/dhcp/dhcpd.conf
/etc/dhcp/dhcpd.conf: interface name too long (is 20)

我尝试在远程系统中通过 PXE 启动，但失败了。如何解决？

PXE-E51: No DHCP or proxyDHCP offers were received.

PXE-M0F: Exiting Broadcom ROM.

/etc/network/interfaces配置：

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
  address 192.168.1.9
  gateway 192.168.1.1
  netmask 255.255.255.0

auto br0
iface br0 inet static
        address 192.168.1.101
        netmask 255.255.255.0
        network 192.168.1.0
        broadcast 192.168.1.255
        gateway 192.168.1.1
        bridge_ports eth0
        bridge_stp off
        bridge_maxwait 5

ifconfig细节：

br0       Link encap:Ethernet  HWaddr f0:de:f1:a4:ec:87  
          inet addr:192.168.1.101  Bcast:192.168.1.255  Mask:255.255.255.0
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

eth0      Link encap:Ethernet  HWaddr f0:de:f1:a4:ec:87  
          UP BROADCAST MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B)

lo        Link encap:Local Loopback  
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:3929 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3929 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0 
          RX bytes:380900 (380.9 KB)  TX bytes:380900 (380.9 KB)

wlan0     Link encap:Ethernet  HWaddr 74:de:2b:e2:94:c6  
          inet addr:192.168.43.9  Bcast:192.168.43.255  Mask:255.255.255.0
          inet6 addr: fe80::76de:2bff:fee2:94c6/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:10941 errors:0 dropped:0 overruns:0 frame:0
          TX packets:13954 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000 
          RX bytes:3537434 (3.5 MB)  TX bytes:1880208 (1.8 MB)

答案1

尝试这个

# Sample /etc/dhcpd.conf


default-lease-time 600;
max-lease-time 7200;
option subnet-mask 255.255.255.0;
option broadcast-address 192.168.1.255;
option routers 192.168.1.254;
option domain-name-servers 192.168.1.1, 192.168.1.2;
option domain-name "***********";
option ntp-servers 192.168.1.254;

subnet 192.168.1.0 netmask 255.255.255.0 {
  range 192.168.1.10 192.168.1.100;
  range 192.168.1.110 192.168.1.200;
}

答案2

如果 DHCP 服务器在启动网络后显示错误并重新启动，请interfaces使用您喜欢的文本编辑器打开该文件：

sudo nano /etc/network/interfaces

然后根据你的喜好输入以下几行：

iface eth0 inet static
    address 192.168.1.*
    network 192.168.1.**
    netmask 255.255.255 
    broadcast 192.168.1.255
    up service isc-dhcp-server restart
    auto eth0

现在使用以下命令重新启动系统：

sudo reboot

您的 DHCP 服务器现在应该可以正常工作了。要测试 DHCP 是否正常工作，请运行该dhclient命令。

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