我的networking由Cisco Catalyst运行，具有多个VLAN和一个DHCP服务器。 在Catalyst上，为每个vlan设置ip address-helper与DHCP服务器的IP ip address-helper 。 ubuntu 14.04上的isc-dhcp-server用作DHCP服务器。
我有几个networking子网设置，可以看到下面，所有这些工作没有问题，除了一个，我不知道为什么。
无法正常工作的networking是10.12.35.0/24从syslog得到的消息如下： Jan 6 06:57:54 dhcp-server-1 dhcpd: DHCPDISCOVER from 00:0c:29:33:3c:bb via 10.12.35.1: unknown network segment
正如我已经提到的 – 所有其他子网运作良好
谢谢！ 我真的很感谢你的帮助！
configuration文件：
option ntp-servers 0.pool.ntp.org, 1.pool.ntp.org, 2.pool.ntp.org; authoritative; allow client-updates; allow unknown-clients; ddns-updates on; ddns-domainname "domain.do"; key rndc-key { secret notgonnatellyou; algorithm hmac-md5; } ddns-update-style interim; option domain-name "domain.do"; option domain-name-servers 10.12.240.29, 10.12.32.41; default-lease-time 600; max-lease-time 7200; log-facility local7; subnet 10.12.4.0 netmask 255.255.252.0 { option domain-name-servers 8.8.8.8; option routers 10.12.4.1; option subnet-mask 255.255.252.0; option broadcast-address 10.12.7.255; pool { range 10.12.4.100 10.12.5.250; } } subnet 10.12.35.0 netmask 255.255.255.0 { ddns-updates off; option routers 10.12.35.1; option subnet-mask 255.255.255.0; option broadcast-address 10.12.35.255; pool { range 10.12.35.100 10.12.35.254; } } subnet 10.12.96.0 netmask 255.255.255.0 { option routers 10.12.96.1; option subnet-mask 255.255.255.0; option broadcast-address 10.12.96.255; pool { range 10.12.96.100 10.12.96.200; } } subnet 10.12.32.0 netmask 255.255.255.0 { option routers 10.12.32.1; option subnet-mask 255.255.255.0; option broadcast-address 10.12.32.255; pool { range 10.12.32.200 10.12.32.220; } } subnet 10.12.0.0 netmask 255.255.252.0 { option routers 10.12.0.1; option subnet-mask 255.255.252.0; option broadcast-address 10.12.3.255; pool { range 10.12.0.10 10.12.2.255; } host some-host { hardware ethernet 00:0c:29:52:1c:a7; fixed-address 10.12.3.0; } host someother-host { hardware ethernet 00:50:56:9f:04:26; fixed-address 10.12.3.1; } host evenother-host { hardware ethernet 10:dd:b1:e7:b2:e0; fixed-address 10.12.0.200; } } zone domain.do. { primary 10.12.240.29; key rndc-key; } zone 12.10.in-addr.arpa. { primary 10.12.240.29; key rndc-key; }
configuration一直OK。 问题是与“鬼过程”。 我不知道这是怎么发生的，但我跑了两个dhcpd进程，第一个是非常古老的…从子网没有在conf中定义的时间