I have set up a network as such: Set up host-only networking on VirtualBox. The first adapter is configured with NAT, the second with host-only networking
HOST: Windows
GUEST: CentOS VM1, CentOS VM2 (clone of VM1)
When executing ifconfig -a on both VMs, I noticed that the MAC addresses are exactly the same. My question is how am I able to ping from VM1 to VM2 considering that the MAC addresses are the same?
VM1:
eth0 Link encap:Ethernet HWaddr 08:00:27:AF:A3:28
inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:feaf:a328/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:27 errors:0 dropped:0 overruns:0 frame:0
TX packets:47 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:10671 (10.4 KiB) TX bytes:5682 (5.5 KiB)
eth1 Link encap:Ethernet HWaddr 08:00:27:C4:A8:B6
inet addr:192.168.56.102 Bcast:192.168.56.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fec4:a8b6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:859 errors:0 dropped:0 overruns:0 frame:0
TX packets:41 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:114853 (112.1 KiB) TX bytes:4823 (4.7 KiB)
ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 fe80::a00:27ff:feaf:a328/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 fe80::a00:27ff:fec4:a8b6/64 scope link
valid_lft forever preferred_lft forever
VM2:
eth0 Link encap:Ethernet HWaddr 08:00:27:AF:A3:28
inet addr:10.0.2.15 Bcast:10.0.2.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:feaf:a328/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:114 errors:0 dropped:0 overruns:0 frame:0
TX packets:151 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:41594 (40.6 KiB) TX bytes:13479 (13.1 KiB)
eth1 Link encap:Ethernet HWaddr 08:00:27:C4:A8:B6
inet addr:192.168.56.101 Bcast:192.168.56.255 Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:fec4:a8b6/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1900 errors:0 dropped:0 overruns:0 frame:0
TX packets:78 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:259710 (253.6 KiB) TX bytes:9736 (9.5 KiB)
ip -6 addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 16436
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 fe80::a00:27ff:feaf:a328/64 scope link
valid_lft forever preferred_lft forever
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qlen 1000
inet6 fe80::a00:27ff:fec4:a8b6/64 scope link tentative dadfailed
valid_lft forever preferred_lft forever
VM1 -> VM2 can ping
VM2 -> VM1 cannot ping
host -> VM1 cannot ping
host -> VM2 can ping
VM1, VM2 can both ping default gateway (192.168.56.1 - address of host-only adapter on HOST)
WinSrv2008 -> VM1 cannot ping WinSrv2008 -> VM2 can ping