svn commit: r232010 - head/share/man/man4

[Andrew Thompson]

Author: thompsa
Date: Wed Feb 22 22:29:23 2012
New Revision: 232010
URL: http://svn.freebsd.org/changeset/base/232010

Log:
  Document the net.link.lagg.X.use_flowid sysctl from r232008.

Modified:
  head/share/man/man4/lagg.4

Modified: head/share/man/man4/lagg.4
==============================================================================
--- head/share/man/man4/lagg.4	Wed Feb 22 22:09:17 2012	(r232009)
+++ head/share/man/man4/lagg.4	Wed Feb 22 22:29:23 2012	(r232010)
@@ -16,7 +16,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd October 18, 2010
+.Dd February 23, 2012
 .Dt LAGG 4
 .Os
 .Sh NAME
@@ -134,6 +134,18 @@ variable in
 .Pp
 The MTU of the first interface to be added is used as the lagg MTU.
 All additional interfaces are required to have exactly the same value.
+.Pp
+The
+.Ic loadbalance
+and
+.Ic lacp
+modes will use the RSS hash from the network card if available to avoid
+computing one, this may give poor traffic distribution if the hash is invalid
+or uses less of the protocol header information.
+Local hash computation can be forced by setting the
+.Va net.link.lagg.X.use_flowid
+.Xr sysctl 8
+variable to zero where X is the interface number.
 .Sh EXAMPLES
 Create a 802.3ad link aggregation using LACP with two
 .Xr bge 4