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authorJay Vosburgh <fubar@us.ibm.com>2007-10-09 22:57:24 -0400
committerJeff Garzik <jeff@garzik.org>2007-10-15 14:20:46 -0400
commitdd957c57c52a3964b8446a3e868a08186274b628 (patch)
treee745b1d3cfe5fbcb4bc6b85084dd90a22e1a1da9 /Documentation
parentd90a162a4ee280201e84944a84f86d6728dc0c27 (diff)
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')
-rw-r--r--Documentation/networking/bonding.txt33
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
281 will be rounded down to the nearest multiple. The default 281 will be rounded down to the nearest multiple. The default
282 value is 0. 282 value is 0.
283 283
284fail_over_mac
285
286 Specifies whether active-backup mode should set all slaves to
287 the same MAC address (the traditional behavior), or, when
288 enabled, change the bond's MAC address when changing the
289 active interface (i.e., fail over the MAC address itself).
290
291 Fail over MAC is useful for devices that cannot ever alter
292 their MAC address, or for devices that refuse incoming
293 broadcasts with their own source MAC (which interferes with
294 the ARP monitor).
295
296 The down side of fail over MAC is that every device on the
297 network must be updated via gratuitous ARP, vs. just updating
298 a switch or set of switches (which often takes place for any
299 traffic, not just ARP traffic, if the switch snoops incoming
300 traffic to update its tables) for the traditional method. If
301 the gratuitous ARP is lost, communication may be disrupted.
302
303 When fail over MAC is used in conjuction with the mii monitor,
304 devices which assert link up prior to being able to actually
305 transmit and receive are particularly susecptible to loss of
306 the gratuitous ARP, and an appropriate updelay setting may be
307 required.
308
309 A value of 0 disables fail over MAC, and is the default. A
310 value of 1 enables fail over MAC. This option is enabled
311 automatically if the first slave added cannot change its MAC
312 address. This option may be modified via sysfs only when no
313 slaves are present in the bond.
314
315 This option was added in bonding version 3.2.0.
316
284lacp_rate 317lacp_rate
285 318
286 Option specifying the rate in which we'll ask our link partner 319 Option specifying the rate in which we'll ask our link partner