我创build了一个简单的VDE开关按照： https : //stackoverflow.com/questions/2082722/how-do-i-create-virtual-ethernet-devices-in-linux
解释这个问题，设置是：
sudo vde_switch -tap tap0 -tap tap1 sudo ifconfig tap0 10.0.0.1 netmask 255.255.0.0 sudo ifconfig tap1 10.0.0.2 netmask 255.255.0.0 广播在接口上被识别：
$ sudo ifconfig tap0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.0.0.1 netmask 255.255.0.0 broadcast 10.0.255.255 inet6 fe80::3402:41ff:fecc:97ad prefixlen 64 scopeid 0x20<link> ether 36:02:41:cc:97:ad txqueuelen 500 (Ethernet) RX packets 6 bytes 468 (468.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 2086 bytes 173190 (169.1 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 tap1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.0.0.2 netmask 255.255.0.0 broadcast 10.0.255.255 inet6 fe80::bced:b3ff:fec0:13a8 prefixlen 64 scopeid 0x20<link> ether be:ed:b3:c0:13:a8 txqueuelen 500 (Ethernet) RX packets 2086 bytes 173190 (169.1 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 6 bytes 468 (468.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
但是，我似乎无法通过这个networking进行广播。 例如
$ sudo ping -b 10.0.255.255 WARNING: pinging broadcast address PING 10.0.255.255 (10.0.255.255) from 10.16.0.1 tap0: 56(84) bytes of data. 64 bytes from 10.0.0.1: icmp_req=1 ttl=64 time=0.066 ms 64 bytes from 10.0.0.1: icmp_req=2 ttl=64 time=0.059 ms 64 bytes from 10.0.0.1: icmp_req=3 ttl=64 time=0.084 ms
我希望能看到10.0.0.1和10.0.0.2的回复。
Ping广播启用：
$ cat /proc/sys/net/ipv4/icmp_echo_ignore_broadcasts 0
我可以做错什么？ VDE / TUN是否允许播放？