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15. Test Commands
15-4
August 2002 4200-A2-GB20-00
OPR-LPBK-VCL
The OPR-LPBK-VCL command places a specific Virtual Channel Link (VCL) in
loopback mode.
Table 15-3. OPR-LPBK-VCL Command Parameters
OPR-LPBK-VCL:[tid]:aid_vcl:[ctag]:[locn],[orgn] [lpbktype];
RESTRICTIONS:
All parameters in this command are position-defined.
Only one loopback at a time is allowed on a facility.
[tid] Identification of the target NE. The default value is null. The NE SID
code is the only other valid value.
aid_vcl Virtual channel identifier for OAM loopbacks. The value can be
preceded with AID=, but this is not required. Grouping and ranging are
allowed. Enter in the following format, replacing lower-case parameters
with the values given:
NTVCL-vpi-vci: VCL for NT circuit
LTVCL-rack-shelf-slot-circuit-vpi-vci: VCL for LT circuit
– rack: rack number (1)
– shelf: shelf number (1)
– slot: LT slot number (1)
– circuit: ADSL circuit on the LT (1−24)
– vpi: Virtual Path Identifier
– vci: Virtual Channel Identifier
– segment: ATM location identifier. A 32-character hexadecimal
field that identifies the intermediate point responsible for looping
back F5 OAM segment loopback cells. If absent, the loopback is
performed at the end of the segment connection. Not accepted for
lpbktype E2E. Optional for lpbktype SEG.
[locn] Facility location. Valid values are:
FEND (far end): This is the default.
FEND_segment
[orgn] Source of the signal to be looped back. The only valid value is NEND
(near end).
[ctag] Correlation tag (6 characters maximum) that links an input command
with associated output responses. The default is 0.
[lpbktype] Loopback type. Valid values are:
E2E: End-to-End loopback. Identifies an OAM loopback test on a VCL
or VCC termination point using an end-to-end OAM cell.
SEG: Segment loopback. Identifies an OAM loopback test on a VCL or
VCC termination point using a segment OAM cell (default).