VeEX RXT-6000e, User Manual

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Monitor Mode Results
Monitor Mode Results features the same statistics as BERT Results. Please see 15.2.2 BERT Results . The Status screen displays
the following statistics:
Utilization (%)
CRC Errors
Service Disruption (ms)
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13.9 Loopback Mode
The Loopback application in the main menu allows the user to establish a manual loopback on the test set. The loopback function is
used when an end-to-end test needs to be performed with one of the test partners in software loopback mode. The loopback
function will loopback the incoming traffic to the test set back into the network under test.
The type of traffic that the loopback function loops back will depend on the type of test layer configured (Layer 1, 2, 3, or 4).
Additional criteria can be set to allow only messages with specific criteria to be looped back. To specify loopback parameters, select
the desired parameter and choose Enable from the drop-down menu. Tap on the box and input a value or select one of the drop-
down menu choices:
Layer 1 : All incoming traffic to the Rx loopback interface will be sent out unaltered to the Tx loopback interface.
Layer 2, 3, & 4 : In a Layer 2 or 3 loopback all incoming test traffic will be looped back.
The loopback function will swap the MAC destination and MAC Source addresses (for Layer 2) or MAC and IP
destination and source addresses (for Layer 3).
All incoming frames with CRC errors will be dropped, similar to what an Ethernet switch does.
All broadcast and multicast frames will be dropped including any incoming unicast frames that have the MAC Source
address equal to the MAC Destination address.
Loopback Parameters : The following parameters are available on Layer 2, 3 and 4. For more information on the
parameters, please see 13.2.1.1 BERT Header Settings in the BERT section. It is possible to enable any of these
parameters to create a customer loopback filter. For example, enabling a filter with VLAN 64, Priority 7, will only loop
back traffic corresponding to these values.
VLAN ID
VLAN Priority
MAC Source
MAC Destination
IP Source Address (Layer 3 & 4 only)
IP Destination (Layer 3 & 4 only)
Precedence (Layer 3 & 4 only)
TOS Value (Layer 3 & 4 only)
UDP SPort (Layer 4 only)
UDP DPort (Layer 4 only)
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