Guest

Preview Tool

Cisco Bug: CSCvs37767 - GLC-LH-SMD inside CVR-QSFP-SFP10G (QSA) inserted in Cisco Nexus 3100 may not come up as expected.

Last Modified

Jan 10, 2020

Products (59)

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 92348GC-X Switch
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 31108TC-V Switch
  • Cisco Nexus 9396TX Switch
  • Cisco Nexus 92160YC-X Switch
  • Cisco Nexus 9396PX Switch
View all products in Bug Search Tool Login Required

Known Affected Releases

7.0(3)I7(7) 9.2(4) 9.3(2)

Description (partial)

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.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.