System information

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/param eters/create file, for example:
echo eth6 > /sys/module/fcoe/parameters/create
To logout, write the network interface name to the
/sys/module/fcoe/param eters/destroy file, for example:
echo eth6 > /sys/module/fcoe/parameters/destroy
For further information on software based FCoE refer to: http://www.open-
fcoe.org/openfc/wiki/index.php/FCoE_Initiator_Quickstart.
Red Hat Enterprise Linux 5.3 bietet vollständigen Support für FCoE auf drei spezialisierten
Hardware Implementierungen. Diese sind: Cisco fnic-Treiber, der Emulex lpfc-Treiber und
der Qlogic qla2xx-Treiber.
iSER Support
iSER support, allowing for block storage transfer across a network, has been added to the
scsi-target-utils package as a Technology Preview. In this release, single portal and
multiple portals on different subnets are supported. There are known bugs when using multiple
portals on the same subnet.
To set up the iSER target component install the scsi-target-utils and libibverbs-devel RPM. The
library package for the InfiniBand hardware that is being used is also required. For example:
1. Release Notes Updates
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