Bug ID 850193: Microsoft Hyper-V hv_netvsc driver unevenly utilizing vmbus_channel queues

Last Modified: Apr 28, 2025

Affected Product(s):
BIG-IP TMOS(all modules)

Known Affected Versions:
13.1.1, 13.1.1.2, 13.1.1.3, 13.1.1.4, 13.1.1.5, 13.1.3, 13.1.3.1, 13.1.3.2, 13.1.3.3, 13.1.3.4, 13.1.3.5, 13.1.3.6, 13.1.4, 13.1.4.1, 13.1.5, 13.1.5.1, 15.1.2, 15.1.2.1, 15.1.3, 15.1.3.1

Fixed In:
16.0.0, 15.1.4, 14.1.4.4

Opened: Nov 14, 2019

Severity: 3-Major

Symptoms

-- Uneven unic channel distribution and transmit errors (tx_errcnt) seen in /proc/unic. -- Packet loss and increased retransmissions under load.

Impact

-- Reduced throughput. -- Packet loss and increased retransmissions under load.

Conditions

BIG-IP Virtual Edition (VE) in Hyper-V or Azure Cloud.

Workaround

None.

Fix Information

None

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips