Technology Previews - Red Hat ENTERPRISE LINUX 5.3 - RELEASE NOTES Release Note

attempt to install the libcmpiutil-devel package on a system that does not have a Subscription
including the Workstation option or is not subscribed to the Workstation channel on the Red Hat
Network, will fail with an unresolved dependency error.
• It is possible in rare circumstances, for makedumpfile to produce erroneous results but not have
them reported. This is due to the fact that makedumpfile processes its output data through a
pipeline consisting of several stages. If makedumpfile fails, the other stages will still succeed,
effectively masking the failure. Should a vmcore appear corrupt, and makedumpfile is in use, it is
recommended that the core be recorded without makedumpfile and a bug be reported.
• An issue may be encountered when using system-config-cluster to configure a Postgres 8
resource agent, resulting in the postgresql service failing to start. To include a Postgres resource
agent in your cluster, please check the man page for the agent, and edit the cluster.conf file in
an editor, then update the cluster with the new configuration file using the appropriate cman_tool
command.
• Due to outstanding driver issues with hardware encryption acceleration, users of Intel WiFi Link
4965, 5100, 5150, 5300, and 5350 wireless cards are advised to disable hardware accelerated
encryption using module parameters. Failure to do so may result in the inability to connect to Wired
Equivalent Privacy (WEP) protected wireless networks after connecting to WiFi Protected Access
(WPA) protected wireless networks.
To do so, add the following options to /etc/modprobe.conf:
alias wlan0 iwlagn
options iwlagn swcrypto50=1 swcrypto=1
(where wlan0 is the default interface name of the first Intel WiFi Link device)
• kdump now restarts when CPUs or DIMMs are hot-added to a system. If multiple items are added
at the same time, several sequential restarts may be encountered. This behavior is intentional, as
it minimizes the time-frame where a crash may occur while memory or processors are not being
tracked by kdump.

1.6. Technology Previews

Software based Fibre Channel over Ethernet (FCoE)
The Fibre Channel over Ethernet (FCoE) driver (fcoe.ko), along with libfc, provides the ability to
run FCoE over a standard Ethernet card. This capability is provided as a technical preview in Red
Hat Enterprise Linux 5.3.
To enable this feature, you must login by writing the network interface name to the /sys/
module/fcoe/parameters/create file, for example:
echo eth6 > /sys/module/fcoe/parameters/create
To logout, write the network interface name to the /sys/module/fcoe/parameters/destroy
file, for example:
Technology Previews
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