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OPERATIONAL DEFECT DATABASE
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- Control-plane / data traffic not sent out of affected ports. This may cause issues such as: - peer devices not getting CDP/LLDP traffic from affected switch. - UDLD err-disable due to UDLD frame not being sent. - MAC flaps due to STP port going unblocking due to STP BPDU not being sent. - LACP member ports going to suspended due to LACP PDU not being sent. - Error message when modifying affected port QoS config: " %FED_QOS_ERRMSG-3-QUEUE_BUFFER_HW_ERROR: Switch 1 R0/0: fed: Failed to configure queue buffers for TenGigabitEthernetx/y/z: code 1." - Affected Ports increment output drops. - Egress queue buffers stuck, even when affected port is admin down. - Check for output drops on affected interface. Check for non-zero "queue buffers" count for queue 0 and 1, even when affected port is admin down. c3850#show platform hardware fed switch 1 qos queue stats interface t1/0/7 DATA Port:6 Enqueue Counters ----------------------------------------------------------------- Queue Buffers Enqueue-TH0 Enqueue-TH1 Enqueue-TH2 Qpolicer (Count) (Bytes) (Bytes) (Bytes) (Bytes) ----- ------- ------------ ------------ ------------ ------------ 0 2500 0 998532 97822 0 1 1474 0 0 12058431 0 ^^^^^^^ non-zero count DATA Port:6 Drop Counters ----------------------------------------------------------------------------------- Queue Drop-TH0 Drop-TH1 Drop-TH2 SBufDrop QebDrop QpolicerDrop (Bytes) (Bytes) (Bytes) (Bytes) (Bytes) (Bytes) ----- ------------ ------------ ------------ ------------ ------------ ------------ 0 0 129768 545951 0 0 0 1 0 0 0 0 0 0 ^^^^^^ Output drops in queue 0 (control-plane)
- Affected models are WS-C3850-48XS and WS-C3650-12X48UZ. No other models affected - 16.9.1 and 16.9.2 affected. 16.12.1 also affected. No other releases affected.
Move affected links to different interface.
Only 3650/3850 platform with 40G fixed uplink is impacted by this bug. Catalyst 9k not affected.