1. ifconfig 명령어를 이용해 현재 설정된 IP 주소를 확인합니다. enp0s3의 IP가 br-enp0s3의 IP로 설정된 것을 확인할 수 있습니다. 오픈스택은 이제부터 br-enp0s3이라는 가상 브리지를 이용해 외부와 통신합니다.

[root@centos ~]# ifconfig
br-enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.25  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::a00:27ff:fe31:fb8d  prefixlen 64  scopeid 0x20<link>
        ether 08:00:27:31:fb:8d  txqueuelen 0  (Ethernet)
        RX packets 2148  bytes 481297 (470.0 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 877  bytes 94700 (92.4 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

enp0s3: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 ether 08:00:27:31:fb:8d txqueuelen 1000 (Ethernet) RX packets 19390 bytes 10688815 (10.1 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 890 bytes 98418 (96.1 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

enp0s8: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 192.168.56.102 netmask 255.255.255.0 broadcast 192.168.56.255 inet6 fe80::a00:27ff:fea1:ec77 prefixlen 64 scopeid 0x20<link> ether 08:00:27:a1:ec:77 txqueuelen 1000 (Ethernet) RX packets 1644 bytes 135892 (132.7 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 1620 bytes 918177 (896.6 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

enp0s9: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500 inet 10.0.4.15 netmask 255.255.255.0 broadcast 10.0.4.255 inet6 fe80::a00:27ff:fe46:b021 prefixlen 64 scopeid 0x20<link> ether 08:00:27:46:b0:21 txqueuelen 1000 (Ethernet) RX packets 1149343 bytes 736258002 (702.1 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 836049 bytes 61967886 (59.0 MiB) 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 584162 bytes 69316529 (66.1 MiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 584162 bytes 69316529 (66.1 MiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0