Getting ready

To begin, ensure that you have two VMs configured with a private network between each.

You can use the Vagrantfile in the Technical requirements section to accomplish this.

Connect to the first of your machines:

$ vagrant ssh centos1

Check that the IP address of centos1 is correctly configured, using the command ip a from Chapter 1, Introduction and Environment Setup.

We expect it to be 192.168.33.10, under the eth1 device:

[vagrant@centos1 ~]$ ip a
<SNIP>
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
 link/ether 08:00:27:ac:f2:12 brd ff:ff:ff:ff:ff:ff
 inet 192.168.33.10/24 brd 192.168.33.255 scope global noprefixroute eth1
 valid_lft forever preferred_lft forever
 inet6 fe80::a00:27ff:feac:f212/64 scope link 
       valid_lft forever preferred_lft forever

You can also use hostname -I to get the IP address of a box, as seen below, but you should note that you won't get an obvious interface designation:

$ hostname -I
10.0.2.15 192.168.33.10

Check that you can ping the IP address of centos2 from within centos1.

We set the second IP to 192.168.33.11:

$ ping 192.168.33.11
PING 192.168.33.11 (192.168.33.11) 56(84) bytes of data.
64 bytes from 192.168.33.11: icmp_seq=1 ttl=64 time=1.17 ms
64 bytes from 192.168.33.11: icmp_seq=2 ttl=64 time=0.997 ms
64 bytes from 192.168.33.11: icmp_seq=3 ttl=64 time=1.18 ms

We have network connectivity between our VMs!