Power 775 D-Link Service Procedure
PN: 41U8487, EC N44172
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3.7
Run Wrap Plug Test (nwlinkdiag) <= Customer Task
STEP 25
Run the nwlinkdiag command on each of the two ports to determine if the ports can come up when wrapped back
on themselves. The nwlinkdiag command is documented in the “p775_management_guide.pdf”, in Section 3.1.17.
Note that the syntax of the nwlinkdiag command is:
nwlinkdiag { -f <frame-id> -c cage-id -m <hub-module –l <link-id> } [-h]
nwlinkdiag { -s <supernode-id> -d <drawer-id> -m <hub-module –l <link-id> } [-h]
where the CEC drawer can be identified either by frame-id and cage-id, or by supernode-id and drawer-id (in the
range 0-3). The module-id specifies the hub module within the CEC drawer (in the range 0-7). The link-id
specifies the link to diagnose.
Link-id values 7-31 map to L-Links LR0-LR23
Link-id values 32-47 map to D-Links D0—D15.
Sample command, with successful output, of the nwlinkdiag command for D-Link 3 supernode 3 drawer 1 hub 4:
$ nwlinkdiag –s 3 –d 1 –m 4 –l 35
This link is operational.
Sample command, with failing output, for D-Link 15, in supernode 49, drawer 0, hub 3:
$ nwlinkdiag –s 49 –d 0 –m 3 -l 47
FR007-CG12-SN049-DR0-HB3-LD15 LOCATION_CODE=U78A9.001.1122333-P1-T9
This link is not operational. If a cable is installed in the optical port,
remove the cable and install an optical wrap device instead, then re-issue
the nwlinkdiag command. If a wrap device is already installed, then the
problem lies behind the optical port.
3.8
Evaluate Wrap Plug Test Results <= SSR Task
If the nwlinkdiag test fails on either of the D-Ports, notify next-level support that the D-Port in the CEC has failed,
and the procedure is complete – no further steps are necessary (replacing the cable will not help if the D-Port has
failed).
If the nwlinkdiag test succeeds on both D-Ports, and if all 4 connector surfaces on the link (2 on the cable, plus 2
in the D-Ports at either end) have all been verified to be clean, then the problem has been isolated to be in the
cable.
If the D-Link cables are individual,
proceed to STEP 26
If the D-Link cables are aggregated into cable assembly groupers,
proceed to STEP 34
