Red Hat ENTERPRISE 5.3 RELEASE NOTES Guia de Instalação descarregar pdf (Página 12)

An issue may be encountered when using system-config-clust er 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 Et hernet (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 provides full support for FCoE on three specialized hardware

implementations. T hese are: Cisco fnic driver, the Emulex lpfc driver, and the Qlogic

qla2xx driver.

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. T here 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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Red Hat ENTERPRISE 5.3 RELEASE NOTES Guia de Instalação Página 12