metrotek Bercut-ET, Operation Manual

Page: 46 / 116

46 Analysis. Typical tasks and solutions
Figure 5.40. Loopback menu
• Port — select port (A or B) to enable the Loopback function.
• Type — select the layer at which the traffic will be retransmitted:
– 1 — Physical Layer;
– 2 — Data Link Layer (MAC);
– 3 — Network Layer (IP);
– 4 — Transport (TCP/UDP).
•
OAM — switch to OAM menu.
5.9.1 Configuring L2 Loopback
Figure 5.41. Layer 2 parameters
• Swap MAC — enable/disable swapping of destination and source
MAC addresses in incoming packets.
• Replace MAC — select MAC address substitution mode:
– Off — MAC address substitution is disabled;
– Source — substitute Source MAC Address value, see fig. 5.43;
Bercut-ET. Operations manual