Linux DHCP服务器迁移

背景

我将两台现有的Linux DHCP服务器移到一个新的networking中。 目前configuration的服务器如下：

shared-network network { #new network subnet 192.168.100.0 netmask 255.255.255.0 { option subnet-mask 255.255.255.0; option routers 192.168.100.1; deny unknown-clients; } # 1 Subnet subnet 192.168.1.0 netmask 255.255.255.0 { option subnet-mask 255.255.255.0; option routers 192.168.1.1; deny unknown-clients; } # 2/3 Subnet subnet 192.168.2.0 netmask 255.255.254.0 { option subnet-mask 255.255.254.0; option routers 192.168.2.1; } # 4 Subnet subnet 192.168.4.0 netmask 255.255.255.0 { option subnet-mask 255.255.255.0; option routers 192.168.4.1; deny client-updates; deny unknown-clients; } # 5 Subnet subnet 192.168.5.0 netmask 255.255.255.0 { option subnet-mask 255.255.255.0; option routers 192.168.5.1; option domain-name "domain.com"; option domain-name-servers xxxx, xxxx, xxxx, xxxx; deny client-updates; deny unknown-clients; } # 6 Subnet subnet 192.168.6.0 netmask 255.255.255.0 { option subnet-mask 255.255.255.0; option routers 192.168.5.1; pool { deny unknown-clients; deny dynamic bootp clients; failover peer "dhcp"; range 192.168.6.100 192.168.6.149; } } } 

问题

我在现有的DHCP服务器上停止了DHCP，并在新的DHCP服务器上启动。 除子网4之外的所有networking都工作。此networking上的MAC（苹果）无法获得IP。

• Linux的DHCP服务器的WLAN /有线
• Hyper-V：访客外部互联网访问
• DHCP正在分配现有的静态IP
• 多个（必需）DHCP服务器导致公共库中的networking问题
• 如何在Windows 2008 R2上禁用RRAS预留IP块

这是从日志：

 dhcpd: DHCPDISCOVER from d5:9d:11:0h:s3:5u via 192.168.4.1 - This message is sent by a client that is connected to a local subnet. dhcpd: DHCPOFFER on 192.168.5.126 to d5:9d:11:0h:s3:5u via 192.168.4.1 sent by a server. dhcpd: DHCPREQUEST for 192.168.5.126 (192.168.100.10) from d5:9d:11:0h:s3:5u via 192.168.5.1 - This DHCP message is sent in response to DHCPOFFER indicating that the client has accepted the network configuration dhcpd: DHCPACK on 192.168.5.126 to d5:9d:11:0h:s3:5u via 192.168.5.1 - This message signals the end of the process. Signals end of conversation. 

这个过程似乎循环与客户永远不会得到一个IP地址。 看日志的第二部分似乎是通过不同的网关进行的。 可能是不对称的路由？

说明：在networking层configuration了BOOTP / IP Helper-address来转发DHCPstream量跨networking。 这些networking在同一个vlan上。

 interface Vlan342 vrf forwarding central-duss ip address 192.168.6.1 255.255.255.0 secondary ip address 192.168.5.1 255.255.255.0 secondary ip address 192.168.4.1 255.255.255.0 secondary ip address 192.168.1.1 255.255.254.0 ip helper-address 192.168.1.9 (current) ip helper-address 192.168.1.10 (current) ip helper-address 192.168.100.10 (new) ip helper-address 192.168.100.11 (new) no ip redirects end