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twoflower:~# ifconfig tap0 create
twoflower:~# ifconfig tap0 up
twoflower:~# ifconfig tap0 inet 172.16.0.1/24
twoflower:~# ping 172.16.0.1
PING 172.16.0.1 (172.16.0.1): 56 data bytes
64 bytes from 172.16.0.1: icmp_seq=0 ttl=64 time=0.084 ms
64 bytes from 172.16.0.1: icmp_seq=1 ttl=64 time=0.040 ms
^C
--- 172.16.0.1 ping statistics ---
2 packets transmitted, 2 packets received, 0% packet loss
round-trip min/avg/max/stddev = 0.040/0.062/0.084/0.022 ms
twoflower:~# ls -lh /dev/tap0
crw-------  1 root  wheel    0, 148 Nov 13 09:12 /dev/tap0