RT-Thread 1.0.0中STM32F107分支开启DHCP接入交换机网络状态FLAGS: DOWN LINK_UP DH
版本RT-Thread 1.0.0，未修改任何内容，硬件金牛开发板开启DHCP现象如下
\ | /
- RT - Thread Operating System
/ | \ 1.0.0 build Feb 22 2012
2006 - 2011 Copyright by rt-thread team
sdcard init failed
File System initialzation failed!
TCP/IP initialized!
finsh>>
->:list_if()
list_if()
network interface: e0 (Default)
MTU: 1500
MAC: 00 80 e1 34 58 55
FLAGS: DOWN LINK_UP DHCP ETHARP
ip address: 0.0.0.0
gw address: 0.0.0.0
net mask: 0.0.0.0
dns server #0: 208.67.222.222
dns server #1: 0.0.0.0
23, 0x00000017
关闭DHCP后现象如下
\ | /
- RT - Thread Operating System
/ | \ 1.0.0 build Feb 22 2012
2006 - 2011 Copyright by rt-thread team
sdcard init failed
File System initialzation failed!
TCP/IP initialized!
finsh>>
->:list_if()
list_if()
network interface: e0 (Default)
MTU: 1500
MAC: 00 80 e1 34 58 55
FLAGS: UP LINK_UP ETHARP
ip address: 192.168.1.30
gw address: 192.168.1.1
net mask: 255.255.255.0
dns server #0: 208.67.222.222
dns server #1: 0.0.0.0
23, 0x00000017
finsh>>
交换机任意端口接路由器（路由器开启DHCP服务）
开启RT-Thread 1.0.0中DHCP
network interface: e0 (Default)
MTU: 1500
MAC: 00 80 e1 34 58 55
FLAGS: UP LINK_UP DHCP ETHARP
ip address: 192.168.1.100
gw address: 192.168.1.1
net mask: 255.255.255.0
dns server #0: 192.168.1.1
dns server #1: 0.0.0.0
23, 0x00000017
finsh>>
请教一下，是不是开启DHCP接入交换机状态应该是up，ip网关等为空 还是上面显示的down
或者是开启DHCP后接入网络自动获取失败后转为分配一默认地址 没有IP当然是DOWN，
“或者是开启DHCP后接入网络自动获取失败后转为分配一默认地址 ”
由您按需使用。（如一定时间内没有成功获取IP就关了DHCP并设一个）
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