QLogic CNA Network driver for Linux SLES 11 v1.00.00.32.a - IBM System x and BladeCenter
QLogic CNA Network driver for Linux SLES 11
Operating System Support
These drivers work with the following Linux kernel 2.6.x distributions
Fixes and Enhancements
The following known issues might be observed in the Converged Network Adapter Networking Driver Update for Linux Kernel 2.6.x:
When trying to compile the driver by running the make install command, the following error can occur:
"Linux kernel source not configured - missing version.h"
To resolve this issue, create the version.h file by going to the Linux source tree and entering the following command:
make include/linux/version.hJumbo Frames System Requirement
Memory allocation failures have been observed on Linux systems that are running Jumbo frames with 64 MB of RAM or less. If you are using Jumbo frames, your system might require more than the advertised minimum requirement of 64 MB of system memory.
Performance Degradation with Jumbo Frames
Degradation in throughput performance might be observed in some Jumbo frames environments. If this degradation is observed, increasing the application's socket buffer size or increasing the /proc/sys /net/ipv4/tcp_*mem entry values might help. For more details, see the specific application manual and /usr/src/linux*/Documentation/networking/ip-sysctl.txt.
Multiple Interfaces on Same Ethernet Broadcast Network
Due to the default ARP behavior on Linux, it is not possible to have one system on two IP networks in the same Ethernet broadcast domain (non-partitioned switch) behave as expected.
All Ethernet interfaces respond to IP traffic for any IP address assigned to the system. This results in unbalanced receive traffic.
If you have multiple interfaces in a server, do either of the following two actions:
UDP Stress Test Dropped Packet Issue
Under small packets UDP stress test with a 10 Gb Ethernet driver, the Linux system can drop UDP packets due to full socket buffers. To relive this issue, you can make one of these two changes.
Unplugging Network Cable While ethtool -p command is running
In Linux kernel versions 2.5.50 and later (including Linux 2.6 kernel), unplugging the network cable while the ethtool -p command is running causes the system to become unresponsive to keyboard commands, except for CTRL+ALT+DEL. Restarting the system appears to be the only remedy.
While creating the bond, perform these steps:
Note: See the change history file for more information.
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Supported operating systems
Applicable countries and regions
Document id: MIGR-5092247