7. 프로바이더 네트워크가 실제로 생성되었는지 ifconfig 명령어를 이용해서 확인해 보겠습니다. brq로 시작되는 프로바이더 네트워크와 tap로 시작되는 네트워크 포트를 확인할 수 있습니다. 이때 네트워크들은 Linuxbridge 에이전트가 생성합니다. 하이퍼바이저를 이용한다면 네트워크 디바이스 이름은 eth가 아닌 enp로 시작합니다.

[root@controller ~]# ifconfig
brq2efd0120-63: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.43  netmask 255.255.255.0  broadcast 192.168.0.255
        ether 08:00:27:3f:ad:71  txqueuelen 0  (Ethernet)
        RX packets 75  bytes 15582 (15.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 8  bytes 480 (480.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.56.101 netmask 255.255.255.0 broadcast 192.168.56.255 inet6 fe80::a00:27ff:fe52:3ff5 prefixlen 64 scopeid 0x20<link> ether 08:00:27:52:3f:f5 txqueuelen 1000 (Ethernet) RX packets 35592 bytes 8126891 (7.7 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 28881 bytes 15702930 (14.9 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

eth1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet6 fe80::a00:27ff:fe3f:ad71 prefixlen 64 scopeid 0x20<link> ether 08:00:27:3f:ad:71 txqueuelen 1000 (Ethernet) RX packets 19043 bytes 25195511 (24.0 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 9434 bytes 772764 (754.6 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6 ::1 prefixlen 128 scopeid 0x10<host> loop txqueuelen 0 (Local Loopback) RX packets 259178 bytes 69011259 (65.8 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 259178 bytes 69011259 (65.8 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

tap59f52880-ce: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 ether f2:a0:88:d4:a2:7a txqueuelen 1000 (Ethernet) RX packets 8 bytes 648 (648.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 79 bytes 16708 (16.3 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0