因DHCP地址池配置错误，导致终端无法获取IP地址

AP3010DN-V2配置为FAT模式,与上端核心交换机对接后,反馈仅调试者的手机和电脑能正常上网,其他使用者的终端都无法连接到无线网络。

1、核对用户AP3010DN-V2 WLAN配置,通过分析,发现AP WLAN部分配置VAP模板为default-ssid，且已绑定正确的service-vlan、ssid-profile、security-profile和traffic-profile。

wlan
 traffic-profile name default
 traffic-profile name default-ssid
 security-profile name AIP
 security wpa2 psk pass-phrase %^%#;TrlGd5iJL+pX*PBfOx0#6.CI00X$!QN:xJVSN0"%^%# aes
 security-profile name default
 security-profile name default-ssid
 ssid-profile name AIP
 ssid AIP
 ssid-profile name default
 ssid-profile name default-ssid
 ssid HUAWEI-8340
 vap-profile name AIP
  ssid-profile AIP
  security-profile AIP
 vap-profile name default
 vap-profile name default-ssid
  service-vlan vlan-id 100
  ssid-profile default-ssid
  security-profile default-ssid
  traffic-profile default-ssid
 air-scan-profile name default
 rrm-profile name default
 radio-2g-profile name default
 radio-5g-profile name default
 wids

2.通过display logbuffer分析log日志,发现用户有获取IP地址超时的问题,初步判断无线终端未获取到IP地址。

Jan  1 2017 11:07:00+00:00 AP-xi-140 %%01DHCP/4/DHCPSNP_ONLINE_FAIL(l)[19]:The user failed to request an IP address.(Client MAC Address=6067-2020-62f8, VLAN=1, APId=0, APMAC=f898-ef0e-8340, APName=AP-xi-140, RadioId=1, SSID=AIP, Failure Reason=The DHCP server did not respond within the specified period).
Jan  1 2017 11:07:10+00:00 AP-xi-140 %%01DHCP/4/DHCPSNP_ONLINE_FAIL(l)[20]:The user failed to request an IP address.(Client MAC Address=1821-959b-3a47, VLAN=1, APId=0, APMAC=f898-ef0e-8340, APName=AP-xi-140, RadioId=1, SSID=AIP, Failure Reason=The DHCP server did not respond within the specified period).
Jan  1 2017 11:08:02+00:00 AP-xi-140 %%01DHCP/4/DHCPSNP_ONLINE_FAIL(l)[21]:The user failed to request an IP address.(Client MAC Address=6067-2020-62f8, VLAN=1, APId=0, APMAC=f898-ef0e-8340, APName=AP-xi-140, RadioId=1, SSID=AIP, Failure Reason=The DHCP server did not respond within the specified period).
Jan  1 2017 11:08:13+00:00 AP-xi-140 %%01DHCP/4/DHCPSNP_ONLINE_FAIL(l)[22]:The user failed to request an IP address.(Client MAC Address=1821-959b-3a47, VLAN=1, APId=0, APMAC=f898-ef0e-8340, APName=AP-xi-140, RadioId=1, SSID=AIP, Failure Reason=The DHCP server did not respond within the specified period).
Jan  1 2017 11:08:32+00:00 AP-xi-140 %%01DHCP/4/DHCPSNP_ONLINE_FAIL(l)[23]:The user failed to request an IP address.(Client MAC Address=6067-2020-62f8, VLAN=1, APId=0, APMAC=f898-ef0e-8340, APName=AP-xi-140, RadioId=1, SSID=AIP, Failure Reason=The DHCP server did not respond within the specified period).

3.核实组网方式,DHCP部署于核心交换机,故对核心交换机进行配置核查:

interface Vlanif1
 ip address 192.168.1.254 255.255.255.0
 dhcp select interface
 dhcp server excluded-ip-address 192.168.1.1 192.168.1.250

经查看DHCP地址池,用户在进行配置时,预留了192.168.1.1到192.168.1.250的地址段,导致地址池资源不足,其他无线终端无法获取到IP地址。经与用户沟通,用户计划预留200个地址,此处为配置错误。

将DHCP地址池的预留地址调整为1到200后,其他无线终端可正常获取ip地址,问题解决。