Additional Resources; Installed Documentation; Useful Websites - Red Hat ENTERPRISE LINUX 5 - DEPLOYMENT Deployment Manual

Chapter 41. General Parameters and Modules
For fragmented TCP or UDP packets and all other IP protocol traffic, the source and destination
port information is omitted. For non-IP traffic, the formula is the same as the layer2 transmit
hash policy.
This policy intends to mimic the behavior of certain switches; particularly, Cisco switches with
PFC2 as well as some Foundry and IBM products.
The algorithm used by this policy is not 802.3ad compliant.
• 2 or layer2+3 — Uses a combination of layer2 and layer3 protocol information to generate the
hash.
Uses XOR of hardware MAC addresses and IP addresses to generate the hash. The formula is:
(((<source_IP> XOR <dest_IP>) AND 0xffff) XOR
( <source_MAC> XOR <destination_MAC> ))
MODULO <slave_count>
This algorithm will place all traffic to a particular network peer on the same slave. For non-IP
traffic, the formula is the same as for the layer2 transmit hash policy.
This policy is intended to provide a more balanced distribution of traffic than layer2 alone,
especially in environments where a layer3 gateway device is required to reach most
destinations.
This algorithm is 802.3ad compliant.

41.6. Additional Resources

For more information on kernel modules and their utilities, refer to the following resources.

41.6.1. Installed Documentation

• lsmod man page — description and explanation of its output.
• insmod man page — description and list of command line options.
• modprobe man page — description and list of command line options.
• rmmod man page — description and list of command line options.
• modinfo man page — description and list of command line options.
• /usr/share/doc/kernel-doc-<version>/Documentation/kbuild/modules.txt — how
to compile and use kernel modules. Note you must have the kernel-doc package installed to read
this file.

41.6.2. Useful Websites

http://tldp.org/HOWTO/Module-HOWTO/
•
Documentation Project.
580
— Linux Loadable Kernel Module HOWTO from the Linux