H3C S7000X 交换机 部分DHCP获取不了IP地址

 DEVICE_NAME          : LS-7003X

DHCP问题：

VLAN 70正常使用，VLAN 71和vlan 72获取不了IP地址，display dhcp server statistics pool vlan71 全是0

配置都是一样的

配置信息：
interface Vlan-interface70

 ip address 172.20.70.1 255.255.255.128

 ip address 172.20.70.254 255.255.255.128 sub

[S7000X-Core]dis dhcp server pool vlan70

Pool name: vlan70

  Network: 172.20.70.0 mask 255.255.255.128 

  dns-list 223.5.5.5 

  expired day 0 hour 8 minute 0 second 0

  gateway-list 172.20.70.1 
------------------------------------------

interface Vlan-interface71

 ip address 172.20.71.1 255.255.255.128

 ip address 172.20.71.254 255.255.255.128 sub

[S7000X-Core]display dhcp server pool vlan71

Pool name: vlan71

  Network: 172.20.71.0 mask 255.255.255.128 

  dns-list 223.5.5.5 

  expired day 1 hour 0 minute 0 second 0

  gateway-list 172.20.71.1 
--------------------------------------------------------

interface Vlan-interface72

 ip address 172.20.72.1 255.255.255.128

 ip address 172.20.72.254 255.255.255.128 sub

[S7000X-Core]display dhcp server pool vlan72

Pool name: vlan72

  Network: 172.20.72.0 mask 255.255.255.128 

  dns-list 223.5.5.5 

  expired day 1 hour 0 minute 0 second 0

  gateway-list 172.20.72.1 

测试终端直连三层交换机