7.5 Loopback
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, Layer 2, or Layer
3. Layer 1:
In a Layer 1 loopback all incoming traffic to the Rx loopback interface will be sent out unaltered to the Tx loopback
interface.
Layer 2/3: 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
8.0 IP and IP Tools
8.1 IP Connection
Note:
1.
The IP functions on the Main Menu and the IP Tools function offer the same functionality.
2.
The IP features described in this section apply to both LAN management port and WAN test ports
except for IPTV which is only available on the WAN test port
3.
The Tools menu applies to all IP applications associated with the 10/100Base-T management port
(except Signature pad).
4.
The IP features described below, cover both LAN and WAN ports.
IP Tools
Net Wiz
WiFi Wiz
Cloning
ReVeal EZ connect
Signature Pad
Home Menu - Tools
Tools Menu - IP Tools
MX100/120 e-Manual D07-00-004 Rev A04
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