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阻止来自其他networking的DHCP服务器

我有两个networking接口的电脑（Windows 7）的问题，有时networking应该是10.1.19.0地址从192.168.0.0

我的networking：在DrayTek路由器Vigor 2925上运行DHCP的192.168.0.0/24。

10.1.19.0/24与DHCP Debian isc-dhcp服务器。

10.1.19.0的接口configuration为无网关，因为该networking无法访问Internet。

我观察到，有时当DHCP服务器表格10.1.19.0networking出现故障或有networking问题时，应该有10.1.19.0的IP有192.168.0.0的IP。

我如何阻止或诊断这个问题。

来自isc-dhcp-server的日志：

http://pastebin.com/3ZauGLZ4 

Jun 14 07:19:35 my_server dhcpd: DHCPREQUEST for 192.168.0.17 from 74:ea:3a:83:cf:b5 via xenbr1: wrong network. Jun 14 07:19:35 my_server dhcpd: DHCPNAK on 192.168.0.17 to 74:ea:3a:83:cf:b5 via xenbr1 Jun 14 07:21:40 my_server dhcpd: DHCPINFORM from 192.168.0.8 via xenbr1: unknown subnet for client address 192.168.0.8 Jun 14 07:21:43 my_server dhcpd: DHCPINFORM from 192.168.0.8 via xenbr1: unknown subnet for client address 192.168.0.8 Jun 14 07:22:26 my_server dhcpd: DHCPREQUEST for 192.168.0.8 from 74:ea:3a:83:fd:a1 via xenbr1: wrong network. Jun 14 07:22:26 my_server dhcpd: DHCPNAK on 192.168.0.8 to 74:ea:3a:83:fd:a1 via xenbr1

在/ etc /默认/ ISC-DHCP服务器： 

  20 # Separate multiple interfaces with spaces, eg "eth0 eth1". 21 INTERFACES="xenbr1" 22 # INTERFACES="eth1"

使用ifconfig： 

 eth0 Link encap:Ethernet HWaddr 14:da:e9:66:85:e5 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:14224698 errors:0 dropped:0 overruns:0 frame:0 TX packets:882902 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:15747051719 (14.6 GiB) TX bytes:584359127 (557.2 MiB) Interrupt:19 Base address:0xcc00 eth1 Link encap:Ethernet HWaddr 00:02:a5:e3:0a:a3 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:15184095 errors:0 dropped:0 overruns:0 frame:0 TX packets:13885407 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:5372912765 (5.0 GiB) TX bytes:2678449338 (2.4 GiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:23307 errors:0 dropped:0 overruns:0 frame:0 TX packets:23307 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:93515531 (89.1 MiB) TX bytes:93515531 (89.1 MiB) vif1.0 Link encap:Ethernet HWaddr fe:ff:ff:ff:ff:ff UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2117 errors:0 dropped:0 overruns:0 frame:0 TX packets:11682370 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:32 RX bytes:874471 (853.9 KiB) TX bytes:13797253040 (12.8 GiB) vif1.1 Link encap:Ethernet HWaddr fe:ff:ff:ff:ff:ff UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:190 errors:0 dropped:0 overruns:0 frame:0 TX packets:72686 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:32 RX bytes:29044 (28.3 KiB) TX bytes:7212594 (6.8 MiB) vif2.0 Link encap:Ethernet HWaddr fe:ff:ff:ff:ff:ff UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:7909 errors:0 dropped:0 overruns:0 frame:0 TX packets:11687161 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:32 RX bytes:643422 (628.3 KiB) TX bytes:13797510223 (12.8 GiB) vif3.0 Link encap:Ethernet HWaddr fe:ff:ff:ff:ff:ff UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:4655 errors:0 dropped:0 overruns:0 frame:0 TX packets:11682466 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:32 RX bytes:2234151 (2.1 MiB) TX bytes:13793456963 (12.8 GiB) xenbr0 Link encap:Ethernet HWaddr 14:da:e9:66:85:e5 inet addr:192.168.0.94 Bcast:192.168.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:860530 errors:0 dropped:0 overruns:0 frame:0 TX packets:638466 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:484505035 (462.0 MiB) TX bytes:566073478 (539.8 MiB) xenbr1 Link encap:Ethernet HWaddr 00:02:a5:4b:0a:a3 inet addr:10.1.19.94 Bcast:10.1.19.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:15158508 errors:0 dropped:0 overruns:0 frame:0 TX packets:13873282 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:5157245979 (4.8 GiB) TX bytes:2677797862 (2.4 GiB)

的/etc/dhcp/dhcpd.conf 

 ddns-update-style none; default-lease-time 600; max-lease-time 900; authoritative; log-facility local7; shared-network my_net { subnet 10.1.19.0 netmask 255.255.255.0 { # option routers 10.1.19.113; option broadcast-address 10.1.19.255; pool { range 10.1.19.60 10.1.19.89; allow unknown-clients; } group { deny unknown-clients; # user1 host host1 { hardware ethernet 78:5A:33:83:CF:FA; fixed-address 10.1.19.2; } ....

似乎你试图通过相同的物理链路来操作2个IPnetworking，而在这之间没有任何逻辑分隔（VLAN）。

如果你的路由器不支持VLAN标记，唯一的方法就是将这两个networking物理隔离，例如将networking10.1.19.0/24中的所有主机/接口插入交换机（不是路由器），而你的Debian的DHCP服务器进入相同的交换机。

如果您没有太多的主机，静态IP地址也是这种情况下的一个选项。