使用dis ip pool以后显示

[CORE-SW]dis ip pool 

 -----------------------------------------------------------------------------

 Pool-name : Vlanif200 

 Pool-No : 0

 Lease : 1 Days 0 Hours 0 Minutes

 Position : Interface 

 Status : Unlocked

 Gateway-0 : 10.70.185.1 

 Network : 10.70.185.0 Mask : 255.255.255.0 

 VPN instance : --

 Address Statistic: Total :253 Used :33 Idle :218 Expired :1 Conflict :1 Disable :1 -----------------------------------------------------------------------------

 Pool-name : Vlanif300 

 Pool-No : 1 Lease : 1 Days 0 Hours 0 Minutes

 Position : Interface

 Status : Unlocked Gateway-0 : 10.70.186.1

 Network : 10.70.186.0 Mask : 255.255.255.0 

 VPN instance : -- 

 Address Statistic: Total :253 Used :29 Idle :224 Expired :1 Conflict :0 Disable :0 

-------------------------------------------------------------------  

然后[CORE-SW]ip pool vlanif200

提示the interface pool can not be configured

该怎么进入vlanif 200 的地址池？修改租期的命令是expired day x hour x minute x吗？