(1)?檢查?DHCP?服務器配置

DHCP?服務器上的配置如下，不存在問題。

#

dhcp?server?ip-pool?1

network?1.1.0.0?mask?255.255.0.0

#

……

#

interface?Ethernet1/0

port?link-mode?route

ip?address?1.1.1.1?255.255.255.0

#

……

#

dhcp?enable

#

(2)?檢查?DHCP?服務器上接口Ethernet1/0?的狀態

與?DHCP?客戶端相連的接口Ethernet1/0?處于up?狀態。

[server]?display?ip?interface?brief?Ethernet?1/0

*down:?administratively?down

(s):?spoofing

Interface?Physical?Protocol?IP?Address

Ethernet1/0?up?up?1.1.1.1

(3)?檢查物理連接是否通暢

在?PC?上手工配置IP?地址1.1.1.2，可以ping?通DHCP?服務器的IP?地址1.1.1.2。

(4)?通過調試信息進行定位

在用戶視圖下打開?DHCP?服務器的調試信息開關debugging?dhcp?server?all。

DHCP?服務器上打印如下調試信息：

?debugging?dhcp?server?all

*May?27?13:02:19:494?2007?server?DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer:?Receive?DHCPDISCOVER?from?00e0-e100-0201.

*May?27?13:02:19:494?2007?server?DHCPS/7/DHCPS_DEBUG_PACKET:

Rx,?interface?Ethernet1/0

Message?type:?request

Hardware?type:?1,?Hardware?address?length:?6

Hops:?0,?Transaction?ID:?16777216

Seconds:?0,?Broadcast?flag:?0

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:?00e0-e100-0201

Server?host?naame:?Not?Configured,?Boot?file?name:?Not?Configured

DHCP?message?type:?DHCP?Discover

*

*May?27?13:02:19:494?2007?server?DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer:?Assign?Free?Lease?from?global?pool.

……

*May?27?13:02:20:110?2007?server?DHCPS/7/DHCPS_DEBUG_PACKET:

Tx,?interface?Ethernet1/0

Message?type:?reply

Hardware?type:?1,?Hardware?address?length:?6

Hops:?0,?Transaction?ID:?16777216

Seconds:?0,?Broadcast?flag:?0

Client?IP?address:?0.0.0.0?Your?IP?address:?1.1.0.2

Server?IP?address:?0.0.0.0?Relay?agent?IP?address:?0.0.0.0

Client?hardware?address:?00e0-e100-0201

Server?host?naame:?Not?Configured,?Boot?file?name:?Not?Configured

DHCP?message?type:?DHCP?Offer

*May?27?13:02:20:110?2007?server?DHCPS/7/DHCPS_DEBUG_COMMON:

DhcpServer:?Failed?to?send?DHCPOFFER?to?MAC=>?00e0-e100-0201?.

*May?27?13:02:20:110?2007?server?DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer:?Sending?DHCPOFFER?failed!

……

*May?27?13:09:54:228?2007?server?DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer:?Receive?DHCPDISCOVER?from?00e0-e100-0201.

*May?27?13:09:54:228?2007?server?DHCPS/7/DHCPS_DEBUG_PACKET:

Rx,?interface?Ethernet1/0

Message?type:?request

Hardware?type:?1,?Hardware?address?length:?6

Hops:?0,?Transaction?ID:?266602672

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:?00e0-e100-0201

Server?host?naame:?Not?Configured,?Boot?file?name:?Not?Configured

DHCP?message?type:?DHCP?Discover

*May?27?13:09:54:228?2007?server?DHCPS/

*May?27?13:09:54:228?2007?server?DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer:?Assign?Free?Lease?from?global?pool.

……

*May?27?13:09:54:816?2007?server?DHCPS/7/DHCPS_DEBUG_PACKET:

Tx,?interface?Ethernet1/0

Message?type:?reply

Hardware?type:?1,?Hardware?address?length:?6

Hops:?0,?Transaction?ID:?266602672

Seconds:?0,?Broadcast?flag:?1

Client?IP?address:?0.0.0.0?Your?IP?address:?1.1.0.2

Server?IP?address:?0.0.0.0?Relay?agent?IP?address:?0.0.0.0

Client?hardware?address:?00e0-e100-0201

Server?host?naame:?Not?Configured,?Boot?file?name:?Not?Configured

DHCP?message?type:?DHCP?Offer

*May?27?13:09:54:816?2007?server?DHCPS/7/DHCPS_DEBUG_COMMON:

DhcpServer:?Send?DHCPOFFER?to?00e0-e100-0201?Offer?IP=>?1.1.0.2.

*May?27?13:09:54:848?2007?server?DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer:?Receive?DHCPREQUEST?from?00e0-e100-0201.

*May?27?13:09:54:848?2007?server?DHCPS/7/DHCPS_DEBUG_PACKET:

Rx,?interface?Ethernet1/0

Message?type:?request

Hardware?type:?1,?Hardware?address?length:?6

Hops:?0,?Transaction?ID:?266602672

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:?0000-5e00-4701

Server?host?naame:?Not?Configured,?Boot?file?name:?Not?Configured

DHCP?message?type:?DHCP?Request

*May?27?13:09:54:848?2007?server?DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer:?Acknowledge?the?DHCPREQUEST?message!

*May?27?13:09:54:848?2007?server?DHCPS/7/DHCPS_DEBUG_PACKET:

Tx,?interface?Ethernet1/0

Message?type:?reply

Hardware?type:?1,?Hardware?address?length:?6

Hops:?0,?Transaction?ID:?266602672

Seconds:?0,?Broadcast?flag:?0

Client?IP?address:?0.0.0.0?Your?IP?address:?1.1.0.2

Server?IP?address:?0.0.0.0?Relay?agent?IP?address:?0.0.0.0

Client?hardware?address:?00e0-e100-0201

Server?host?naame:?Not?Configured,?Boot?file?name:?Not?Configured

DHCP?message?type:?DHCP?Ack

*May?27?13:09:54:848?2007?server?DHCPS/7/DHCPS_DEBUG_COMMON:

DhcpServer:?Send?DHCPACK?to?00e0-e100-0201?Offer?IP=>?1.1.0.2.

*May?27?13:09:54:848?2007?server?DHCPS/7/DHCPS_DEBUG_COMMON:

DHCPServer:?Requesting?security?module(s)?to?add?a?security?entry?(1.1.0.4

00e0-e100-0201)?succeeded.

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