问题描述
S9706配置的DHCP地址池中存在大量地址冲突conflict的IP，但实际上这些IP地址在网络中不存在，无法ping通。
相关配置：
#
dhcp enable
#
dhcp server database enable
dhcp server database recover
#
vlan 30
#
ip pool vlan30
gateway-list 192.168.51.254
network 192.168.48.0 mask 255.255.252.0
lease day 0 hour 1 minute 0
dns-list 219.146.1.66 219.146.1.77
#
interface Vlanif30
ip address 192.168.51.254 255.255.252.0
dhcp select global
#
处理过程
S9706配置的DHCP地址池中存在大量地址冲突conflict的IP，但实际上这些IP地址在网络中不存在，这些IP无法ping通，设备上也学不到这些IP的ARP，并且reset重置地址池中conflict的IP又会立即看到状态变成conflict:
<HUAWEI>display ip pool name vlan30 all
Pool-name : vlan30
Pool-No : 19
Lease : 0 Days 1 Hours 0 Minutes
Domain-name : -
DNS-server0 : 219.146.1.66
DNS-server1 : 219.146.1.77
NBNS-server0 : -
Netbios-type : -
Position : Local Status : Unlocked
Gateway-0 : 192.168.51.254
Network : 192.168.48.0
Mask : 255.255.252.0
VPN instance : --
-----------------------------------------------------------------------------
Start End Total Used Idle(Expired) Conflict Disable
-----------------------------------------------------------------------------
192.168.48.1 192.168.51.254 1021 73 116(116) 832 0
-----------------------------------------------------------------------------
Network section :
-----------------------------------------------------------------------------
Index IP MAC Lease Status
-----------------------------------------------------------------------------
0 192.168.48.1 - - Conflict
1 192.168.48.2 - - Conflict
2 192.168.48.3 - - Conflict
3 192.168.48.4 - - Conflict
4 192.168.48.5 - - Conflict
5 192.168.48.6 - - Conflict
6 192.168.48.7 - - Conflict
7 192.168.48.8 - - Conflict
8 192.168.48.9 - - Conflict
9 192.168.48.10 - - Conflict
10 192.168.48.11 - - Conflict
11 192.168.48.12 - - Conflict
12 192.168.48.13 2082-c031-ce4a 2931 Used
13 192.168.48.14 - - Conflict
14 192.168.48.15 - - Conflict
15 192.168.48.16 - - Conflict
16 192.168.48.17 - - Conflict
17 192.168.48.18 - - Conflict
18 192.168.48.19 - - Conflict
19 192.168.48.20 - - Conflict
20 192.168.48.21 0402-1f27-8cab - Expired
21 192.168.48.22 - - Conflict
22 192.168.48.23 - - Conflict
23 192.168.48.24 - - Conflict
24 192.168.48.25 - - Conflict
25 192.168.48.26 - - Conflict
26 192.168.48.27 - - Conflict
27 192.168.48.28 - - Conflict
28 192.168.48.29 4404-4487-92bb - Expired
29 192.168.48.30 - - Conflict
30 192.168.48.31 - - Conflict
31 192.168.48.32 - - Conflict
32 192.168.48.33 - - Conflict
33 192.168.48.34 - - Conflict
34 192.168.48.35 - - Conflict
35 192.168.48.36 - - Conflict
36 192.168.48.37 - - Conflict
37 192.168.48.38 - - Conflict
38 192.168.48.39 - - Conflict
39 192.168.48.40 - - Conflict
40 192.168.48.41 - - Conflict
41 192.168.48.42 - - Conflict
现网曾经发现某些无线终端在发送Discover报文申请地址阶段，会响应ping探测，造成地址池误报地址冲突。面对这种异常终端，思科、微软DHCP服务器也会出现误报。
解决方案
这种情况可以关闭地址池ping探测功能：
[HUAWEI] dhcp server ping packet 0（默认为2，设置为0则不再ping探测）。