The firmware of certain network adapters does not fully support the 802.1ad standard, which is also called Q-in-Q or stacked virtual local area networks (VLANs). Contact your hardware vendor on details how to verify that your network adapter uses a firmware that supports the 802.1ad standard and how to update the firmware. As a result, with the correct firmware, configuring stacked VLANs on RHEL 8.0 work as expected.
In Red Hat Enterprise Linux 8, the e1000 network driver is not supported. This affects both bare metal and virtual environments. However, the newer e1000e network driver continues to be fully supported in RHEL 8.
Previously, the glibc i686 packages contained an alternative glibc build, which avoided the use of the thread descriptor segment register with negative offsets (nosegneg). This alternative build was only used in the 32-bit version of the Xen Project hypervisor without hardware virtualization support, as an optimization to reduce the cost of full paravirtualization. These alternative builds are no longer used and they have been removed. 2b1af7f3a8