Bug ID 845629: Hv_netvsc vmbus_17 timeout at boot causes reduced NIC performance

Last Modified: Sep 13, 2023

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

Known Affected Versions:
13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3, 13.0.1, 13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,,,, 13.1.4,, 13.1.5,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,,, 14.1.3,, 14.1.4,,,, 15.1.2,, 15.1.3,

Fixed In:
16.0.0, 15.1.4,

Opened: Nov 01, 2019

Severity: 2-Critical


-- Uneven unic channel distribution and transmit errors seen in /proc/unic. -- Packet loss and increased retransmissions under load. -- Errors reported in dmesg: hv_netvsc vmbus_17 (unregistered net_device): timeout before we got a set response....


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


BIG-IP Virtual Edition (VE) in Azure boots while the hypervisor is under high load.


This condition occurs when a timeout occurs when booting, resulting in the NIC driver not getting necessary information from the hypervisor. Rebooting the BIG-IP VE may clear the condition if the hypervisor load has reduced.

Fix Information


Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips