我有这个配置：
config.vm.network "public_network", ip: "192.168.56.101", :mac => "0022334455DA"
在vagrant upifconfig 打印之后：
eth0 Link encap:Ethernet HWaddr 08:00:27:12:96:98
inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fe12:9698/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1141 errors:0 dropped:0 overruns:0 frame:0
TX packets:861 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:115407 (115.4 KB) TX bytes:98490 (98.4 KB)
eth1 Link encap:Ethernet HWaddr 00:22:33:44:55:da
inet addr:192.168.56.101 Bcast:192.168.56.255 Mask:255.255.255.0
inet6 addr: fe80::222:33ff:fe44:55da/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:319 errors:0 dropped:0 overruns:0 frame:0
TX …