排除dhcp分配的IP地址时报错如下：
Error: Only idle or expired IP address can be disabled.

[core-Vlanif100]dhcp server excluded-ip-address 172.16.100.222
Error: Only idle or expired IP address can be disabled.

解决：

[core]display ip pool interface vlanif100 used | in 100.222

--------------------------------------------------------------------------
--------------------------------------------------------------------------
--------------------------------------------------------------------------
Network section :
--------------------------------------------------------------------------
Index              IP               MAC      Lease   Status
--------------------------------------------------------------------------
100.222    c81f-6639-b3df      30718   Used
---------------------------------------------------------------------------
[core]q
reset ip pool interface vlanif100 172.16.100.222
Warning: If the IP addresses that are being used are reclaimed, may influence normal user in the network. Are you sure to continue?[Y/N]:y