Bug ID 940089: Intermittent packet loss in VE instances hosted in Hyper-V

Last Modified: Sep 16, 2020

Bug Tracker

Affected Product:  See more info
BIG-IP TMOS(all modules)

Known Affected Versions:
13.1.0,,,,,,,,, 13.1.1,,,,, 13.1.3,,,,, 14.0.0,,,,,, 14.0.1,, 14.1.0,,,,,, 14.1.2,,,,,,,, 15.0.0, 15.0.1,,,,, 15.1.0,,,,,, 16.0.0,

Opened: Aug 26, 2020
Severity: 3-Major


A variety of possible symptoms may occur: -- Slow client response -- Excessive retransmissions in TCP connections -- Failure of pool monitors -- Interfaces being marked as down -- High availability (HA) failover events -- Increasing transmit-error totals for interface -- Messages in kern.log: err kernel: : [1589891.358651] hv_netvsc vmbus_16 eth1: unable to send receive completion pkt (tid 98a)...retrying 1


Failure to pass network traffic.


-- BIG-IP Virtual Edition (VE) hosted in Microsoft Hyper-V hypervisor environment. -- The UNIC device driver is configured.


None identified.

Fix Information


Behavior Change