Traffic Generation
73
5. Configure the correct MTU with the help of the MTU menu. You may want to set
the MTU to 1518 bytes for traffic analysis in line with IEEE 802.3 or to other value
to allow jumbo frames. The maximum allowed MTU is 10,000 bytes.
6. Select one of the traffic flows between Flow A1 and Flow A8 (or Flow B1 to
Flow B8 in Port B) to enter in the flow specific configuration.
7. Configure the encapsulation you are going to use in the generated frames. Basi-
cally, the Encapsulation menu sets the number of VLAN tags to be included in the
generated frames.
8. Enter the source MAC address with the help of the Source MAC address from and
Source MAC address controls. You can configure the factory MAC address as the
source address for the generated frames or enter a custom address.
9. Enter the destination MAC address or addresses by using the Destination MAC
address from, Destination MAC address and Address range size. If you choose to
generate a destination address range you will be requested to enter the number of
addresses that made up the range.
10. Configure the Ethertype value.
Note: Some frame structures require an specific value of the Ethertype. This field
cannot be configured in this case.
11. If you are using frames carrying one (IEEE 802.1Q) or two (IEEE 802.1ad, Q-in-Q)
VLAN tags, enter the C-VID and C-VLAN priority.
12. If you are using frames carrying two VLAN tags (IEEE 802.1ad, Q-in-Q), enter the
S-VID, S-VLAN priority and Drop-Eligible Indicator.
13. If you are generating not-standard Q-in-Q frames, set the S-VLAN TPID to one of
the allowed values.
14. Configure the frame length to the correct value with the help of Frame size.
15. If necessary, repeat the specific flow configuration for one or more traffic flows
(Flow B1 to Flow B8 or Flow B1 to Flow B8, depending on the test port) from the
Frame menu.
4.1.3. Configuring the Bandwith Profile
In the same way that the Frame menu configures the frame format for each of the
available traffic flows, the Bandwidth profile sets how many frames are transmitted and
how transmission events are distributed in time. The simplest is to generate frames with
a constant bit rate specified in frames per second, bits per second or as a percentage
of the total transmission channel capacity. However, the test unit provides other
alternatives to the constant transmission like the periodic burst, ramp transmission or
random transmission with Poisson statistics.
The bandwidth profile settings are available only in port Port A because the traffic
generator is not available in Port B. The procedure to configure the bandwidth profile
in a traffic flow is as follows:
1. Make sure that your tester is connected to the network. The physical layer must
be up and working (See section 4.1.1).
To Next Page
Loading...