Raw Traffic using Quick Flow Groups

Objectives

We will use the protocol configuration from the first lab exercise to provide DUT routing

information only. Our creation of flow groups will not use this information but we will rely on the DUT being able to forward traffic to those advertised networks. This would be the equivalent of creating raw traffic with the traffic wizard but without the need to for manual ARP resolution. We will also include egress field tracking.

 Use quick flow groups to create flow groups across our assigned ports.

 Use the packet editor to customize the traffic in each flow group to direct it to a specific range of hosts.

 Use the packet editor on each flow group to use a range of IP TOS values

Topology

Each port on the Ixia will emulate three neighboring routers. While the routing protocol is running, each router will advertise a single route range of 10 consecutive networks. All configuration parameters are found in Table 1 in Appendix A.

Figure 6. Logical Lab Topology

01 Ago ura Roa d Cala bas as, CA 913 02 [Toll Free US 1. 877. FOR .IXIA ) (Int’ l + 1.81 8.87 1.18

Module 5 – Quick Flow Groups

Lab Procedure

1. Continue with the protocol configuration from Lab 2 and leave the protocol running. Go ahead and delete any traffic items you have already created. To do this, go to ”L2-3 Traffic Items” in the resource tree on the left hand side of the GUI and click on it. From here, highlight Lab 4 traffic item from middle pane and right click. Select “Delete selected items” and hit “OK”.

NOTE: If you have reset your ports, either restore your saved configuration or

rerun your wizard configurations and restart the protocol. The protocol must be running correctly at this point before you proceed.

2. Back in the Home menu, select Add Traffic and use the drop down to select “L2-3 Quick Flow Group”.

© IXIA 2012 FEBRUARY

3. Select just your first port. Each port will constitute a flow group based on the number selected in the upper right. Leave this value as 1. Click on OK.

4. Each flow group is equivalent to a stream and the usual stream parameters can be configured very much analogous to IxExplorer but with the added benefit of the packet editor.

NOTE: There are many ways to configure the flow groups themselves. For now,

we will use the table (grid) approach to set as many parameters as the table will allow. We will then bring up a more detailed configuration screen to set up additional items.

Module 5 – Quick Flow Groups

(which should indicate None.) Select the down arrow to bring out a window where you will select the other port. Click on OK.

6. The default is Ethernet II frame format. Select the top cell under Encapsulation; left click to select the cell then click again on the down arrow to bring up an abbreviated view for the Stack Diagram of the packet editor. Select IPv4 to append this to the stack.

7. You now have appended an IPv4 header to the frame. You may continue to append additional headers. Add a UDP header to the frame as well. You can remove this layer by clicking on the red X alongside the header. A more complex protocol stack can be saved and reused at a later time by clicking on the floppy icon. We can also set IP and MAC addresses here but we will defer this as the two ports must have different IP addresses. Click on OK.

© IXIA 2012 FEBRUARY

8. By adding IP and UDP to the protocol stack, we can customize the title bar to better suit our needs and continue using the grid to complete our configuration. Place the cursor in the title bar and right click. Select Column Chooser.

9. You now have the column chooser which is available for all tables. Among the Visible

Columns, select and move (to the left) Preamble Size, CRC, Frame Payload and

Transmission as we are not concerned with these for this exercise. On the left side, expand

L3 and IPv4 and move to the right side IPv4 Destination Address, Source Address, and after expanding IP Priority and TOS, IP4: Precedence. Move these fields up to just after Flow Group Name. We also want to set the TOS bits but this method will not allow us access to fields smaller than a byte. Select OK when done.

Module 5 – Quick Flow Groups

your mouse cursor onto another column. Ex. Select the IPv4: Source field.

NOTE: We will forward traffic from and to specific hosts within a single network

among the advertised network ranges. We derive these values from how we know the protocol has been configured. This is almost equivalent to raw traffic. Many combinations are possible here.

11. Under IP Destination and Source address for the port, select the cell then select the down arrow. Enter values shown below. X is your assigned user number.

12. Under IP: Precedence, click in the top cell and select from the drop down menu List. Enter TOS values 2 <enter> and 5 <enter>. Click on OK.

© IXIA 2012 FEBRUARY

13. In the 2nd _{tab across the top called “Quick Flow Group Options” make sure to enable both}

Ingress and Egress Tracking (in that order.) For Egress Tracking, set the Offset drop

down menu to IPv4 TOS Precedence (3 bits.)

14. We are done configuring the Quick Flow Groups.

15. Now let’s go apply the traffic and start transmitting. Make sure you are in the Home tab and first use the drop down under L2-3 Traffic to apply and then go back a 2nd _{time to start} transmit.