48
IMPORTANT:
If a QSFP+ to SFP+ cable is used, use an optical attenuator to make sure the Tx power of the
QSFP+ module stays below the Rx power of the SFP+ module.
3.
Verify that the fiber matches the transceiver module. If they do not match, replace the fiber with
a new one that matches the transceiver module.
4.
If the issue persists, contact H3C Support.
100-GE QSFP28 fiber port fails to come up
Symptom
A 100-GE QSFP28 fiber port fails to come up.
Troubleshooting flowchart
Figure 13 Troubleshooting link up failure on a port
Solution
To resolve the issue:
1.
Verify that the local and peer ports are operating correctly:
Use a QSFP28 cable to connect the local port directly to another 100-GE QSFP28 fiber port on
the same card.
If the local port can come up, replace the peer port with a new one (on a card of the same
type, if possible).
A port failed to come up
No
Yes
No
Yes
Replace transceiver
module/cable
No
Yes
Yes
No
Fiber correct?
No
Yes
Yes
No
Contact the support
End
Transceiver
module/cable correct?
Local/peer port
operating correctly?
Replace local/peer port
Replace fiber
Resolved?
Resolved?
Resolved?
