Bug ID 756802: BIG-IQ and BIG-IP TCP connection issues with 1-NIC VE public cloud deployments

Last Modified: May 04, 2020

Bug Tracker

Affected Product:  See more info
BIG-IQ Platform(all modules)

Known Affected Versions:
6.1.0

Opened: Jan 28, 2019
Severity: 3-Major

Symptoms

Network connectivity between public cloud deployments of BIG-IQ and BIG-IP VE instances (in AWS, Azure) could be affected by TCP packet fragmentation, leading to TCP connection resets. This problem is prevalent in BIG-IQ VE and version 12.x BIG-IP VE platforms.

Impact

BIG-IQ VE is not able to discover or manage BIG-IP VE instances, with single-NIC VE configurations.

Conditions

VE public cloud deployments of BIG-IQ and BIG-IP v12.x VE platforms. Device discovery and management workflows on BIG-IQ may fail with TCP connection reset errors while communicating with the remote BIG-IP VE.

Workaround

Slightly change (increase or decrease) the MTU value on the affected BIG-IQ and BIG-IP instances, e.g. tmsh modify /net vlan internal mtu 1504 tmsh save sys config

Fix Information

None

Behavior Change