Recently, Red Hat announced the availability of the first service pack to their release of Red Hat Enterprise Linux 6. Red Hat Enterprise Linux 6.1 includes driver updates, bug fixes and support for new hardware, refer to RHEL 6.1 release notes for more info.
Some of the new features in RHEL 6.1 include introduction of consistent NIC naming feature, an optional convention for naming network interfaces (refer to the blog for more information) and support for new hardware (including but not limited to Broadcom 57712, Intel 82599 and QLogic 8242 based networking devices).
RHEL 6.1 has been extensively validated on supported Dell PowerEdge Servers. Please refer to the important information guide for a complete list of issues fixed in RHEL 6.1 on Dell PowerEdge servers.