现在我使用的设备都是Aruba MSR,MSA系列产品

debug dhcp调试DHCP协商过程

若AP能够不能正常获得IP地址，可能是ONU、OLT核心网的问题

通过查找，排错

调试过程是：AP能够发送DHCPdiscover

AC响应AP，发送DHCPoffer

正常情况下，AP再向AC发送request

AC响应AP，发送ACK

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今天试了下，站在ONU上都能PING通互连的地址，但AP就是不上线，还出现这样的(经调试)：

%DHCP-449511: can't find layer3 ip-pool, relay agent ip = 0x0ac0d801!

cannot found available ip-pool

经过一天的协商，双方都在调试，发现原来是ONU的IP地址掩码由26写成24了

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AC上的时间与现在的北京时间不同步

第一步：先在AC的WEB方式上 基本配置 －－－NTP服务 把NTP服务器和NTP客户端都关闭，保存退出

第二步：在AC的业务板上，手动设置时间

格式如下：clock set  2011 06 21 2 8 57 00

2011表示年

06表示月

21表示日

2表示星期二

8表示时

57表示分

00表示秒

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debug dhcp调试出现这样的问题，是由于地址池没有配置

DHCP请求包通过指定的端口进来，找到匹配IP地址网段，才能正确找到地址池

如10.10.10.0的网段，只能找10.10.10.0的网段的地址池

若是10.10.10.0的网段来发送DHCP请求，而地址是10.10.11.0的地址池，则提示以下信息：

%DHCP-929852: received DISCOVER packet

%DHCP-929852: mac = 00:17:7b:2d:67:95 , vlan = 3582, cvlan = 4095, mod = 1, port = 4, xid = 0x1972cc68

ciaddr = 0x00000000, yiaddr = 0x00000000, siaddr = 0x00000000, giaddr = 0x0ac0ce01, rqstip = 0x00000000

option60code = 23631, no option43

%DHCP-929852: can't find layer3 ip-pool, relay agent ip = 0x0ac0ce01!

%DHCP-929852: cannot found available ip-pool

%DHCP-929862: received DISCOVER packet

%DHCP-929862: mac = 00:17:7b:2d:9a:2c , vlan = 3582, cvlan = 4095, mod = 1, port = 4, xid = 0x54a4e1ef

ciaddr = 0x00000000, yiaddr = 0x00000000, siaddr = 0x00000000, giaddr = 0x0ac0ce01, rqstip = 0x00000000

option60code = 23631, no option43

%DHCP-929862: can't find layer3 ip-pool, relay agent ip = 0x0ac0ce01!

%DHCP-929862: cannot found available ip-pool

%DHCP-929865: received DISCOVER packet

%DHCP-929865: mac = 00:17:7b:2d:67:95 , vlan = 3582, cvlan = 4095, mod = 1, port = 4, xid = 0x1972cc68

ciaddr = 0x00000000, yiaddr = 0x00000000, siaddr = 0x00000000, giaddr = 0x0ac0ce01, rqstip = 0x00000000

option60code = 23631, no option43

%DHCP-929865: can't find layer3 ip-pool, relay agent ip = 0x0ac0ce01!

%DHCP-929865: cannot found available ip-pool