<p>eth0 is used by vagrant for nat configuration in order to establish portforwarding. eth1 private networks that you have configured should allow you to ping/nslookup from one node to another. You can use the following to customize the ip of the nat but I don't see why would you do that:</p>

<pre><code>config.vm.provider "virtualbox" do |vbx|
  vbx.customize ['modifyvm', :id, '--natnet1', '192.168.169.0/24']
end
</code></pre>

<p>Update: tested your setup it doesn't work, this is some CentOS 8 specifics.</p>

CC BY-SA 4.0
2020-06-07T16:17:45.623Z
why vagrant sets eth0 on all the machines deployed to the same IP 10.0.2.15? 
I found a workaround and not configuring the private network in the vagrantfile  to the same range as the nat network allows the machines to be reacheable. so doing this; `ldap.vm.network "private_network", ip: "192.168.2.100" ` works
danidar
CC BY-SA 4.0
2020-06-04T11:33:14.187Z
2020-06-07T12:55:12.730Z
2020-06-07T12:55:12.730Z
anVzdGFub3RoZXJodW1hbg
<p>I have a problem with vagrant that is running on windows 10 when I deploy centos 8 machines all the machines have eth0 with the same Ip and they cannot communicate with each other </p>

<p>the ip 10.0.2.15 is always present. this is the vagrant file: </p>

<pre><code>Vagrant.configure("2") do |config|
  # The most common configuration options are documented and commented below.
  # For a complete reference, please see the online documentation at
  # https://docs.vagrantup.com.

  # Every Vagrant development environment requires a box. You can search for
  # boxes at https://vagrantcloud.com/search.
  config.vm.define "ansible" do |ansible|
    ansible.vm.box = "bento/centos-8.1"
    ansible.vm.hostname = "ansible"
    ansible.vm.network "private_network", ip: "10.0.2.10"
  end

  config.vm.define "ldap" do |ldap|
    ldap.vm.box = "bento/centos-8.1"
    ldap.vm.hostname = "ldap"
    ldap.vm.network "private_network", ip: "10.0.2.100"
  end
</code></pre>

<p>and this is the ip configuration on the first machine; </p>

<pre><code>[vagrant@ansible ~]$ ip a
1: lo: &lt;LOOPBACK,UP,LOWER_UP&gt; mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 52:54:00:72:fe:6e brd ff:ff:ff:ff:ff:ff
    inet 10.0.2.15/24 brd 10.0.2.255 scope global dynamic noprefixroute eth0
       valid_lft 86077sec preferred_lft 86077sec
    inet6 fe80::5054:ff:fe72:fe6e/64 scope link
       valid_lft forever preferred_lft forever
3: eth1: &lt;BROADCAST,MULTICAST,UP,LOWER_UP&gt; mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 08:00:27:91:b2:04 brd ff:ff:ff:ff:ff:ff
    inet 10.0.2.10/24 brd 10.0.2.255 scope global noprefixroute eth1
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fe91:b204/64 scope link
       valid_lft forever preferred_lft forever

[vagrant@ansible ~]$ ip route show
default via 10.0.2.2 dev eth0 proto dhcp metric 100
10.0.2.0/24 dev eth0 proto kernel scope link src 10.0.2.15 metric 100
10.0.2.0/24 dev eth1 proto kernel scope link src 10.0.2.10 metric 101
</code></pre>

<p>is it getting eth0 by dhcp? and then assigning the ip i want to eth1? is there something i can do with virtualbox configuration on windows? </p>

<p>i need both machines to see each other </p>

<windows><vagrant><centos>
vagrant on windows 10 incorrect network configuration on multi-machine setup
danidar
# vagrant on windows 10 incorrect network configuration on multi-machine setup

(Asked by: username_0 on 2020-06-02)

I have a problem with vagrant that is running on windows 10 when I deploy centos 8 machines all the machines have eth0 with the same Ip and they cannot communicate with each other 
the ip 10.0.2.15 is always present. this is the vagrant file: 
Vagrant.configure("2") do |config|
  # The most common configuration options are documented and commented below.
  # For a complete reference, please see the online documentation at
  # https://docs.vagrantup.com.

  # Every Vagrant development environment requires a box. You can search for
  # boxes at https://vagrantcloud.com/search.
  config.vm.define "ansible" do |ansible|
    ansible.vm.box = "bento/centos-8.1"
    ansible.vm.hostname = "ansible"
    ansible.vm.network "private_network", ip: "10.0.2.10"
  end

  config.vm.define "ldap" do |ldap|
    ldap.vm.box = "bento/centos-8.1"
    ldap.vm.hostname = "ldap"
    ldap.vm.network "private_network", ip: "10.0.2.100"
  end

and this is the ip configuration on the first machine; 
[vagrant@ansible ~]$ ip a
1: lo:  mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: eth0:  mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 52:54:00:72:fe:6e brd ff:ff:ff:ff:ff:ff
    inet 10.0.2.15/24 brd 10.0.2.255 scope global dynamic noprefixroute eth0
       valid_lft 86077sec preferred_lft 86077sec
    inet6 fe80::5054:ff:fe72:fe6e/64 scope link
       valid_lft forever preferred_lft forever
3: eth1:  mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 08:00:27:91:b2:04 brd ff:ff:ff:ff:ff:ff
    inet 10.0.2.10/24 brd 10.0.2.255 scope global noprefixroute eth1
       valid_lft forever preferred_lft forever
    inet6 fe80::a00:27ff:fe91:b204/64 scope link
       valid_lft forever preferred_lft forever

[vagrant@ansible ~]$ ip route show
default via 10.0.2.2 dev eth0 proto dhcp metric 100
10.0.2.0/24 dev eth0 proto kernel scope link src 10.0.2.15 metric 100
10.0.2.0/24 dev eth1 proto kernel scope link src 10.0.2.10 metric 101

is it getting eth0 by dhcp? and then assigning the ip i want to eth1? is there something i can do with virtualbox configuration on windows? 
i need both machines to see each other

**Tags:** windows, vagrant, centos


---

## 1 answers

### Answer by username_1 on 2020-06-04. Score: 2 | Accepted answer

eth0 is used by vagrant for nat configuration in order to establish portforwarding. eth1 private networks that you have configured should allow you to ping/nslookup from one node to another. You can use the following to customize the ip of the nat but I don't see why would you do that:
config.vm.provider "virtualbox" do |vbx|
  vbx.customize ['modifyvm', :id, '--natnet1', '192.168.169.0/24']
end

Update: tested your setup it doesn't work, this is some CentOS 8 specifics.

> **Comments:**
> **username_0**: why vagrant sets eth0 on all the machines deployed to the same IP 10.0.2.15?  I found a workaround and not configuring the private network in the vagrantfile  to the same range as the nat network allows the machines to be reacheable. so doing this; `ldap.vm.network "private_network", ip: "192.168.2.100" ` works  

---

