Bug 1377872

Description of problem:
The OSP 9 Installation and Usage guide has an appendix for OVS Bonding Options, but it includes an example of "balance-tcp", which should never be used, and lacks Linux bonding mode options.

Version-Release number of selected component (if applicable):
OSP 9 GA


Actual results:
The bonding recommendations should not mention "balance-tcp" mode (except to say never to use it), because LACP is broken in the version of OVS included in OSP 9.

Expected results:
The bonding instructions should be general (not specifically for OVS), and should be correct.

Additional info:
Here is a good summary of the OVS bonding options:

 "bond_mode=balance-slb lacp=off"

This enables balance-slb, which uses standard switch port configuration (no special switch support is required, only multiple ports with the same VLAN configuration), and LACP is not supported in this mode. LACP should not be used with OVS in OSP 9.

Here are some other configuration options for OVS:

# Set the link detection to use miimon heartbeats or monitor carrier (default)
  "other_config:bond-detect-mode=[miimon|carrier]"
# If using miimon, heartbeat interval in milliseconds (100 is usually good)
 "other_config:bond-miimon-interval=100"
# Number of milliseconds a link must be up to be activated (to prevent flapping)
 "other_config:bond_updelay=1000"

Here is a good recommendation for a Linux bonding LACP config:

"mode=802.3ad lacp_rate=[fast|slow] updelay=1000 miimon=100"

The mode statement enables LACP, the lacp_rate statement defines whether LACP packets are sent every 1 or every 30 seconds, the updelay establishes the minimum amount of time that an interface must be active before it is used for traffic (this prevents outages due to port "flapping"), and the miimon is the interval in milliseconds that is used for monitoring port state via MIIMON functionality in the driver.