NEC iPASOLINK EX Advanced - Loopback Operation; L2 Loopback Control

4-4 CONTROL ITEMS
GGS-000548-01E iPASOLINK EX Advanced: Operation & Maintenance
4.3 Loopback Operation
To execute the loopback control, set the system into the Maintenance mode.
Important:
To operate the
Loopback Control, the system must be set into the Maintenance
mode.
4.3.1 L2 Loopback Control
This operation carries out the loopbacks for Layer 2 level. Incoming Layer 2 frames
are looped to the source direction with MAC Destination and Source Address Swap.
iPASOLINK EX/A provides two modes for L2 Loopback Control:

Loopback 1 Mode: Loops frames back at the near side of L2SW.

Loopback 2 Mode: Loops frames back at the far side of L2SW. The selected
ports must be operative. In this mode, the available frame size to operate L2
loopback is the maximum frame size minus 16 bytes. The maximum frame size is
specified by the
8.2.2 Max Frame Size Setting in the Set Network and
System Provisioning manual.
Procedure 4-2
1. Click the Maintenance tool button on the tool bar of the WebLCT to put the
system into the Maintenance Mode. The
MAINT indicator on the tool bar
changes to orange.
2. In the
MENU frame on the left, expand the Maintenance Control, then its
submenu
Loopback Control to select L2 Loopback Control.
The
L2 Loopback Control window appears.