目标是10.49.x.x走拓展坞有线网卡，其余走无线网卡。

查看网卡名称

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ifconfig

无线网卡名称为：en0，拓展坞有线网卡名称为：en4。

查看只插有线网卡的路由

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❯ route get 10.49.0.1
   route to: 10.49.0.1
destination: default
       mask: default
    gateway: 192.168.14.254
  interface: en4
      flags: <UP,GATEWAY,DONE,STATIC,PRCLONING,GLOBAL>
 recvpipe  sendpipe  ssthresh  rtt,msec    rttvar  hopcount      mtu     expire
       0         0         0         0         0         0      1500         0

添加路由

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sudo route add -net 10.49.0.0/16 192.168.14.254
# -interface en4