[Docker] Bridge Network 簡介

$ docker 
exec
 -it alpine1 ping -c 2 alpine2
PING alpine2 (172.18.0.3): 56 data bytes

64 bytes from 172.18.0.3: 
seq
=0 ttl=64 time=0.095 ms
64 bytes from 172.18.0.3: 
seq
=1 ttl=64 time=0.076 ms

--- alpine2 ping statistics ---

2 packets transmitted, 2 packets received, 0% packet loss

round-trip min/avg/max = 0.076/0.085/0.095 ms



$ docker 
exec
 -it alpine1 ping -c 2 alpine4
PING alpine4 (172.18.0.4): 56 data bytes

64 bytes from 172.18.0.4: 
seq
=0 ttl=64 time=0.145 ms
64 bytes from 172.18.0.4: 
seq
=1 ttl=64 time=0.102 ms

--- alpine4 ping statistics ---

2 packets transmitted, 2 packets received, 0% packet loss

round-trip min/avg/max = 0.102/0.123/0.145 ms



$ docker 
exec
 -it alpine1 ping -c 2 alpine3
ping: bad address 
'alpine3'



$　docker 
exec
 -it alpine1 ping -c 2 172.17.0.2
PING 172.17.0.2 (172.17.0.2): 56 data bytes


--- 172.17.0.2 ping statistics ---

2 packets transmitted, 0 packets received, 100% packet loss



$ docker 
exec
 -it alpine1 ping -c 2 alpine1
PING alpine1 (172.18.0.2): 56 data bytes

64 bytes from 172.18.0.2: 
seq
=0 ttl=64 time=0.052 ms
64 bytes from 172.18.0.2: 
seq
=1 ttl=64 time=0.079 ms

--- alpine1 ping statistics ---

2 packets transmitted, 2 packets received, 0% packet loss

round-trip min/avg/max = 0.052/0.065/0.079 ms



$ docker 
exec
 -it alpine1 ping -c 2 www.google.com
PING www.google.com (172.217.160.68): 56 data bytes

64 bytes from 172.217.160.68: 
seq
=0 ttl=53 time=7.252 ms
64 bytes from 172.217.160.68: 
seq
=1 ttl=53 time=7.329 ms

--- www.google.com ping statistics ---

2 packets transmitted, 2 packets received, 0% packet loss

round-trip min/avg/max = 7.252/7.290/7.329 ms