In this tutorial, you will add a virtual machine for Ethernet connectivity to branch1 and branch2 of your virtual voice lab. Although I use a separate vm in this tutorial, you can also simply add two more interfaces to the headquarters virtual PC if you are running short on PC resources.



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VMWare, the Linux Host and VMWare workstation Configurations

  1. Make sure all your virtual machines are shutdown.
  2. Run ‘sudo vmware-config.pl’ from a terminal window
    • Take defaults until you are asked to skip networking. Do not skip.
    • Use the wizard to configure networking.
    • Do not make changes to bridge or NAT configs.
    • Configure another host-only network for Branch2
    • Allow the script to probe for an unused subnet on vmnet2.
    • Take defaults through the rest of the config.
    • Save the configuration
  3. Configure bridging on the Linux host for communications between GNS3 and vmware.
    • Bridge for Branch 1
      • Run ‘sudo tunctl -t tap1′ to create a tap interface for Branch1
      • Run ‘sudo ifconfig tap1 0.0.0.0 promisc up’ to set tap1 to promiscuous mode.
      • Run ‘sudo ifconfig vmnet1 0.0.0.0 promisc up’ to set vmnet1 to promiscuous mode
      • Run ‘sudo brctl addbr br1′ to create a bridge for Branch1
      • Run ‘sudo brctl addif br1 vmnet1′ to add vmnet1 to the Branch1 bridge
      • Run ‘sudo brctl addif br1 tap1′ to add tap1 to the Branch1 bridge
      • Run ‘sudo ifconfig br1 10.10.11.99/24 up’ configure host IP address for Branch1
    • Bridge for Branch 2
      • Run ‘sudo tunctl -t tap2′ to create a tap interface for Branch2
      • Run ‘sudo ifconfig tap2 0.0.0.0 promisc up’ to set tap2 to promiscuous mode.
      • Run ‘sudo ifconfig vmnet2 0.0.0.0 promisc up’ to set vmnet2 to promiscuous mode
      • Run ‘sudo brctl addbr br2′ to create a bridge for Branch2
      • Run ‘sudo brctl addif br2 vmnet2′ to add vmnet2 to the Branch2 bridge
      • Run ‘sudo brctl addif br2 tap2′ to add tap2 to the Branch2 bridge
      • Run ‘sudo ifconfig br1 10.10.11.99/24 up’ configure host IP address for Branch2
    • Make changes permanent with changes to the /etc/network/interfaces file

      # — Branch 1 Configuration
      auto br1
      iface br1 inet static
      address 10.10.11.99
      netmask 255.255.255.0
      bridge-ports vmnet1 tap1
      pre-up ifconfig vmnet1 0.0.0.0 promisc up
      pre-up ifconfig tap1 0.0.0.0 promisc up

      # — Branch 2 Configuration
      auto br2
      iface br2 inet static
      address 10.10.12.99
      netmask 255.255.255.0
      bridge-ports vmnet2 tap2
      pre-up ifconfig vmnet2 0.0.0.0 promisc up
      pre-up ifconfig tap2 0.0.0.0 promisc up

  4. Add two ethernet interfaces to the Branch XP workstation
    • Open VMWare
    • Install VMWare Tools on the Branch XP workstation
    • Edit the branch XP workstation
    • Add two network interfaces for the branch workstation
    • Start the workstation
    • Configure an ip address for branch 1 on ethernet 1 (
    • Configure an ip address for branch 2 on ethernet 2
    • Change the default gateway as needed for each test performed.

GNS3 Configurations

  1. Add network clouds for branch 1 (tap1)
    • Add a cloud object for branch1
    • Select the TAP tab
    • Enter tap1
  2. Add network clouds for branch 2 (tap2)
    • Add a cloud object for branch2
    • Select the TAP tab
    • Enter tap2
  3. Create a link between br1, br2 and their respective lan clouds.
  4. Configure ip addressing on the br1 routerinterface f0/0
    no shutdown
    ip address 10.10.11.1 255.255.255.0
  5. Configure ip addressing on the br2 routerinterface f0/0
    no shutdown
    ip address 10.10.12.1 255.255.255.0
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