W5500无法ping通外网

发布于 2023-04-06 23:50:54 浏览：1051 订阅该版

使用源码调试W5500芯片，只修改了MAC（确认没有问题）和ip网关等参数，硬件、电脑和路由器都接在交换机上，ping外网，包括路由器都不通，提示unknown host 和hostent is RT_NULL ,ping电脑能通

```
ifconfig
network interface device: W5500 (Default)
MTU: 1472
MAC: 00 08 dc 11 11 11
FLAGS: UP LINK_UP INTERNET_DOWN DHCP_DISABLE
ip address: 192.168.31.167
gw address: 192.168.31.1
net mask  : 255.255.255.0
dns server #0: 192.168.31.1
dns server #1: 0.0.0.0
msh />ping 192.168.31.114
ping: not found specified netif, using default netdev W5500.
32 bytes from 192.168.31.114 icmp_seq=0 ttl=128 time=3 ms
32 bytes from 192.168.31.114 icmp_seq=1 ttl=128 time=3 ms
32 bytes from 192.168.31.114 icmp_seq=2 ttl=128 time=4 ms
32 bytes from 192.168.31.114 icmp_seq=3 ttl=128 time=3 ms
msh />ping 192.168.123.1
ping: not found specified netif, using default netdev W5500.
[E/wiz.socket] WIZnet socket(0) send data failed(-13).
ping: unknown host 192.168.123.1
[E/wiz.socket] WIZnet socket(0) send data failed(-13).
ping: unknown host 192.168.123.1
[E/wiz.socket] WIZnet socket(0) send data failed(-13).
ping: unknown host 192.168.123.1
[E/wiz.socket] WIZnet socket(0) send data failed(-13).
ping: unknown host 192.168.123.1
msh />ping baidu.com
ping: not found specified netif, using default netdev W5500.
wiz_ping: hostent is RT_NULL.
0 bytes from 0.0.0.0 icmp_seq=0 time=0 ms
wiz_ping: hostent is RT_NULL.
0 bytes from 0.0.0.0 icmp_seq=1 time=0 ms
wiz_ping: hostent is RT_NULL.
0 bytes from 0.0.0.0 icmp_seq=2 time=0 ms
wiz_ping: hostent is RT_NULL.
0 bytes from 0.0.0.0 icmp_seq=3 time=0 ms
msh />

```