H3CS5500DHCP中继之后，手动设置的IP无法ping通网关不能能正常上网

最终目的：局域网部署DHCP服务器，所有网段IP自动分配和手动设置都能正常上网， 

当前问题：按照此思路配置完成之后，自动获取的IP地址可以正常上网，但是手动配置的IP只能ping通接入层的设备，无法ping通网关，也无法正常上网，不知道是哪里出现了配置遗漏？希望能给予指点，非常感谢。

H3C S5500具体配置如下： 

 dhcp relay server-group 1 ip 10.7.7.7 

 interface Vlan-interface10 

ip address 172.16.10.1 255.255.255.0 

dhcp select relay dhcp relay address-check enable 

dhcp relay server-select 1 

 interface Vlan-interface20 

ip address 172.16.20.1 255.255.255.0 

dhcp select relay dhcp relay address-check enable 

dhcp relay server-select 1

interface Vlan-interface30 

ip address 172.16.20.1 255.255.255.0 

dhcp select relay dhcp relay address-check enable 

dhcp relay server-select 1  

DHCP 服务器为 windows server2019

dis version 

 H3C Comware Platform Software 

 Comware Software, Version 5.20, Release 5206 

 Copyright (c) 2004-2013 Hangzhou H3C Tech. Co., Ltd. All rights reserved. 

 H3C S5500-58C-HI-D uptime is 52 weeks, 3 days, 3 hours, 52 minutes 

 H3C S5500-58C-HI-D with 2 Processors 

 1024M bytes SDRAM 

 4096K bytes Nor Flash Memory 

 512M bytes Nand Flash Memory 

 Hardware Version is REV.C 

 CPLD Version is 003 

 Bootrom Version is 211