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Network Testing and Emulation Solutions

3. Routed Mode WanLinks with Virtual Routers

Goal: Setup a Routed Mode WanLink between two Virtual Routers. Return to LANforge-ICE Cookbook

In this test scenario, LANforge-ICE is used to simulate a routed network where incoming traffic on one port is sent through one Virtual Router then through a WanLink, then through a second Virtual Router and then finally out to a port on a different network.

  1. Setup a Netsmith Connection.

    A: Go to the Status tab and click Netsmith
    B: Right-click in the Netsmith window and select New Connection
    C: Accept defaults, Auto Create everything then click OK
    D: Click Apply in the Netsmith window to create the connection

  2. Setup two Virtual Routers.

    A: Right-click in the Netsmith window and select New Router
    B: Accept defaults, or change the name, graphical size and notes about the Virtual Router.

    • Click OK when done
    C: Click the Apply button and repeat for the second Virtual Router

    • NOTE:   After making any changes to the Netsmith window, you must click Apply or your changes will NOT be implemented and could be lost.
    D: Click the Apply button followed by the Sync button

    • NOTE:   Clicking Sync makes sure any changes are synchronized with the current database.

    • Also, note the Netsmith Apply Progress bar displayed at the bottom of the Netsmith window.

  3. Configure the ports on the ends of the WanLink.

    A: Right-click port rddVR0 and select Modify Port
    B: Assign an IP address and Network Mask.

    This example uses 10.1.1.100 and 255.255.255.0.
    C: Right-click port rddVR1 and select Modify Port
    D: Assign an IP address and Network Mask.

    This example uses 10.1.1.101 and 255.255.255.0.

  4. Drag the ends of the WanLink into the Virtual Routers.

    A: Left-click and drag rddVR0 into Router R0(1)
    B: Left-click and drag rddVR1 into Router R1(2)
    C: Click the Apply button at the bottom of the Netsmith window

  5. Setup the Routed Mode WanLink characteristics.

    A: Right-click the WanLink and select Modify Wanlink
    B: Verify that the B-side ports, rddVR0b and rddVR1b are filled in.

    • NOTE:   Be sure to set the impairment, if any, and transfer rate.

    • Click OK when done
    C: Right-click the WanLink and select Toggle Wanlink to set its status to Running (green).

  6. Setup the physical ports.

    A: Right-click port eth0 and select Modify Port
    B: Assign port eth0 an IP address and Network Mask

    • NOTE:   This example uses 172.1.1.1 and 255.255.255.0
    C: Drag port eth0 into Router R0(1)
    D: Right-click port eth1 and select Modify Port
    E: Assign port eth1 an IP address and Network Mask.

    • NOTE:   This example uses 172.2.2.1 and 255.255.255.0
    F: If either physical port connects to a larger routed network, right-click the port and select Modify and enter values for Next Hop and Subnets as follows:

    • NOTE:   Next Hop is the default gateway of your next network hop

    • Up to 8 different subnets can be configured or 0.0.0.0/0 for any subnet

    • Click OK when done, then click Apply in Netsmith to apply your changes
    G: Drag port eth1 into Router R1(0)
    H: Click the Apply button at the bottom of the Netsmith window

  7. Run traffic and verify results. Refer to the LANforge FIRE Cookbook to run traffic.

    A: Verify that the traffic on eth0 is being sent to Default Gateway 172.1.1.1 and that traffic on eth1 is being sent to Default Gateway 172.2.2.1

    • NOTE:   In this example, traffic to eth0 is from a port configured with IP address 172.1.1.105 Network Mask 255.255.255.0 and Default Gateway 172.1.1.1

    • Traffic to eth1 is from a port configured with IP address 172.2.2.106 Network Mask 255.255.255.0 and Default Gateway 172.2.2.1

    • To generate routed network traffic refer to the LANforge FIRE Cookbook Routed Network Testing section.

    • If your physical configuration is complete, Netsmith should appear as shown here
    B: Right-click one of the Virtual Routers and select Show Routing Table to view the internal routing table for the Virtual Router
    C: LANforge Virtual Routers by default use simple subnet routing, but can also use OSPF or BGP routing protocols. LANforge can also perform IPv4 multicast routing.

  Email Candela Technologies at: support@candelatech.com if you have any questions or suggestions.

 

Candela Technologies, Inc., 2026 Main Street, Suite A, P.O. Box 3285, Ferndale, WA 98248, USA
www.candelatech.com | sales@candelatech.com | +1 360 380 1618
Candela Technologies, 2026 Main Street, Suite A, P.O. Box 3285, Ferndale, WA 98248, USA
www.candelatech.com | sales@candelatech.com | +1 360 380 1618
Last modified: Fri Mar 11 09:51:07 PST 2011