我有两台S6520交换机做IRF,创建了一个VLAN135,开启了DHCP服务,也创建了IP池,请问电脑无法获取到地址怎么回事?有的无线AP能获取到地址有的也获取不到IP。
配置如下:
# dhcp server ip-pool vlan135
gateway-list 10.78.135.1
network 10.78.135.0 mask 255.255.255.0
dns-list 10.75.2.50 114.114.114.114
forbidden-ip 10.78.135.1
forbidden-ip 10.78.135.2
option 43 ascii 10.78.128.140 #
#
>dis dhcp server statistics Pool
number: 1
Pool utilization: 36.76%
Bindings: Automatic: 75 Manual: 0 Expired: 0
Conflict: 126 Messages received: 20631
DHCPDISCOVER: 19978 DHCPREQUEST: 378
DHCPDECLINE: 0 DHCPRELEASE: 275
DHCPINFORM: 0 BOOTPREQUEST: 0 Messages sent: 717
DHCPOFFER: 360 DHCPACK: 353 DHCPNAK: 4
BOOTPREPLY: 0 Bad Messages: 0
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最佳答案
可以打开设备debug看下报文交互过程
debugging dhcp server packet
t m
t d
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*Jan 3 22:15:32:845 2013 GUORENPCIC_ShenZhen_CORE DHCPS/7/PACKET: From 0.0.0.0 port 68, interface Vlan-interface135 Message type: REQUEST (1) Hardware type: 1, Hardware address length: 6 Hops: 0, Transaction ID: 862067070 Seconds: 0, Broadcast flag: 1 Client IP address: 0.0.0.0 Your IP address: 0.0.0.0 Server IP address: 0.0.0.0 Relay agent IP address: 0.0.0.0 Client hardware address: 9c3a-9a04-f67c Server host name: not configured Boot file name: not configured DHCP message type: DHCPDISCOVER (1)
您好,请知:
关于DHCP无法自动获取到IP地址,以下是排查要点,请参考:
1、手动设置IP地址、子网掩码、默认网关、DNS看下是否能上网。
2、检查DHCP地址池的空间范围是否足够使用。
3、检查DHCP地址池的IP地址段是否跟VLAN IP在同一个子网内。
4、检查接入的端口是否已划分到了正确的VLAN下。
5、检查是否有私接路由器的LAN口造成了DHCP分配的混乱。
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*Jan 3 22:15:32:845 2013 GUORENPCIC_ShenZhen_CORE DHCPS/7/PACKET: From 0.0.0.0 port 68, interface Vlan-interface135 Message type: REQUEST (1) Hardware type: 1, Hardware address length: 6 Hops: 0, Transaction ID: 862067070 Seconds: 0, Broadcast flag: 1 Client IP address: 0.0.0.0 Your IP address: 0.0.0.0 Server IP address: 0.0.0.0 Relay agent IP address: 0.0.0.0 Client hardware address: 9c3a-9a04-f67c Server host name: not configured Boot file name: not configured DHCP message type: DHCPDISCOVER (1)