Cisco Bug: CSCvs37767 - GLC-LH-SMD inside CVR-QSFP-SFP10G (QSA) inserted in Cisco Nexus 3100 may not come up as expected.
Sep 30, 2020
- Cisco Nexus 3000 Series Switches
- Cisco Nexus 9516 Switch
- Cisco Nexus 92348GC-X Switch
- Cisco Nexus 3548 Switch
- Cisco Nexus 3548-X Switch
- Cisco Nexus 3636C-R Switch
- Cisco Nexus 92304QC Switch
- Cisco Nexus 31108TC-V Switch
- Cisco Nexus 92160YC-X Switch
- Cisco Nexus 9396PX Switch
Known Affected Releases
7.0(3)I7(7) 9.2(4) 9.3(2)
Symptom: When a GLC-LH-SMD 1G SFP transceiver inside of a CVR-QSFP-SFP10G (QSA) QSFP+ transceiver is inserted in a 40G QSFP+ interface of a Nexus 3100 device, the link may not reliably come up/up as expected within NX-OS. This symptoms can particularly be observed after a reload of the Nexus 3100 device, although other scenarios exist where the interface may not come up as expected. The device at the remote end of the down/down link may report that the link is up/up as expected. Furthermore, the RX/ingress counters of the affected interface on the Nexus 3100 device may report that traffic is being received, while the TX/egress counters of the affected interface do not report any traffic being sent out of the link. Conditions: +++ Nexus 3100 device connected to a link. +++ Nexus 3100 has a GLC-LH-SMD 1G SFP transceiver inside of a CVR-QSFP-SFP10G (QSA) QSFP+ transceiver inserted in a 40G QSFP+ interface. +++ From Nexus 3100 device's perspective, the relevant interface for this link is down/down. +++ From the remote device's perspective, the relevant interface for this link is up/up. +++ The Nexus 3100 reports incrementing RX/ingress counters, but non-incrementing TX/egress counters.
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