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| author | Jay Vosburgh <fubar@us.ibm.com> | 2007-10-10 04:57:24 +0200 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-10-15 20:20:46 +0200 |
| commit | dd957c57c52a3964b8446a3e868a08186274b628 (patch) | |
| tree | e745b1d3cfe5fbcb4bc6b85084dd90a22e1a1da9 /Documentation/networking | |
| parent | net/bonding: Destroy bonding master when last slave is gone (diff) | |
| download | linux-dd957c57c52a3964b8446a3e868a08186274b628.tar.xz linux-dd957c57c52a3964b8446a3e868a08186274b628.zip | |
net/bonding: Optionally allow ethernet slaves to keep own MAC
Update the "don't change MAC of slaves" functionality added in
previous changes to be a generic option, rather than something tied to
IB devices, as it's occasionally useful for regular ethernet devices as
well.
Adds "fail_over_mac" option (which is automatically enabled for IB
slaves), applicable only to active-backup mode.
Includes documentation update.
Updates bonding driver version to 3.2.0.
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'Documentation/networking')
| -rw-r--r-- | Documentation/networking/bonding.txt | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Documentation/networking/bonding.txt b/Documentation/networking/bonding.txt index 1da566630831..11340625e363 100644 --- a/Documentation/networking/bonding.txt +++ b/Documentation/networking/bonding.txt @@ -281,6 +281,39 @@ downdelay will be rounded down to the nearest multiple. The default value is 0. +fail_over_mac + + Specifies whether active-backup mode should set all slaves to + the same MAC address (the traditional behavior), or, when + enabled, change the bond's MAC address when changing the + active interface (i.e., fail over the MAC address itself). + + Fail over MAC is useful for devices that cannot ever alter + their MAC address, or for devices that refuse incoming + broadcasts with their own source MAC (which interferes with + the ARP monitor). + + The down side of fail over MAC is that every device on the + network must be updated via gratuitous ARP, vs. just updating + a switch or set of switches (which often takes place for any + traffic, not just ARP traffic, if the switch snoops incoming + traffic to update its tables) for the traditional method. If + the gratuitous ARP is lost, communication may be disrupted. + + When fail over MAC is used in conjuction with the mii monitor, + devices which assert link up prior to being able to actually + transmit and receive are particularly susecptible to loss of + the gratuitous ARP, and an appropriate updelay setting may be + required. + + A value of 0 disables fail over MAC, and is the default. A + value of 1 enables fail over MAC. This option is enabled + automatically if the first slave added cannot change its MAC + address. This option may be modified via sysfs only when no + slaves are present in the bond. + + This option was added in bonding version 3.2.0. + lacp_rate Option specifying the rate in which we'll ask our link partner |