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networking - Communicate between virtual machines in internal network using two routers


I would like to virtual machines to be able to communicate with each other. I needs to configure network interfaces according to the following schedule: enter image description here


In this case, suffice it to any machine assign the IP address using the command ip addr? And I will add ip route on BST routers?


All systems are running on virtual machines. Host is Windows.


BST1, BST2, Eagle-Server - Debian machines


PC1, PC2 - Windows machines


I'm using VirtualBox


Edit


My config:


Eagle:

       ip addr add  192.168.254.1/24 dev eth0
       ip route add 10.10.10.4/30 via 192.168.254.253 dev eth0
       ip route add 172.16.200.0/24 via 192.168.254.253 dev eth0
       ip route add 172.16.255.0/24 via 192.168.254.253 dev eth0
BST1

      ip addr add 192.168.254.253/24 dev eth0
      ip addr add 10.10.10.6/30 dev eth1
      ip route add 172.16.200.0/24 via 10.10.10.5 dev eth1
      ip route add 172.16.255.0/24 via 10.10.10.5 dev eth1
BST2

      ip addr add 10.10.10.5/30 dev eth1 
      ip addr add 172.16.255.254/24 dev eth0
      ip addr add 172.16.200.254/24 dev eth2
      ip route add 192.168.254.0/24 via 10.10.10.5 dev eth1

Ping between BST1 and Eagle does not work. Ping from PC1 (172.16.255.128) and PC2 (172.16.255.127) to BST2 - request timed out.



Answer



You need three internal nets:




  1. intern0 between Eagle and BST1




  2. intern1 between BTS1 and BTS2




  3. intern2 between BTS2 and the two pcs;




Thus Eagle and the two pcs need only one network adapter, BTS1 need2 2, and you can configure BTS2 with 3 network adapters.


You need to enable IPv4 forwarding on BTS1 and BTS2 as follows:


     echo 1 > /proc/sys/net/ipv4/ip_forward

You may configure all the interfaces of Eagle, BTS1 and BTS2 with the ip command:


Eagle:


       ip addr add  192.168.254.1/24 dev eth0
       ip route add 10.10.10.4/30 via 192.168.254.253 dev eth0
       ip route add 172.16.200.0/24 via 192.168.25.253 dev eth0
       ip route add 172.16.255.0/24 via 192.168.25.253 dev eth0

BST1


      ip addr add 192.168.254.253/24 dev eth0
      ip addr add 10.10.10.6/30 dev eth1
      ip route add 172.16.200.0/24 via 10.10.10.5 dev eth1
      ip route add 172.16.255.0/24 via 10.10.10.5 dev eth1

BST2


      ip addr add 10.10.10.5/30 dev eth1 
      ip addr add 172.16.255.254/24 dev eth0
      ip addr add 172.16.200.254/24 dev eth2
      ip route add 192.168.254.0/24 via 10.10.10.5 dev eth1

You will need to configure the PCs in Windows (sorry no hablo Windows and want to keep it that way), to have the two static IPs you chose for them. Also, remember to use 172.16.200.254 as the default gateway for Kowalski, and 172.16.255.254 as the default gateway for Nowak.


That's all.


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