From 1f9ce5f4a106d2a030f3613016cd6e3cd5cf9502 Mon Sep 17 00:00:00 2001
From: gjb <gjb@FreeBSD.org>
Date: Sat, 12 May 2012 18:10:27 +0000
Subject: Docuement requirement to alter some sysctls when using igb(4) with
 jumbo frames.

PR:		153738
Submitted by:	Tom Judge (tom!tomjudge.com)
Discussed with:	jfv (in part, a long time ago...)
MFC after:	1 week
---
 share/man/man4/igb.4 | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

(limited to 'share')

diff --git a/share/man/man4/igb.4 b/share/man/man4/igb.4
index 169d057..f487048 100644
--- a/share/man/man4/igb.4
+++ b/share/man/man4/igb.4
@@ -31,7 +31,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd October 11, 2011
+.Dd May 12, 2012
 .Dt IGB 4
 .Os
 .Sh NAME
@@ -160,6 +160,14 @@ The minimum is 80, and the maximum is 4096.
 .It Va hw.igb.enable_aim
 If set to 1, enable Adaptive Interrupt Moderation.
 The default is to enable Adaptive Interrupt Moderation.
+.It Va kern.ipc.nmbclusters
+The maximum number of mbuf clusters allowed.
+If the system has more than one igb card or jumbo frames are
+enabled, this value will need to be increased.
+.It Va kern.ipc.nmbjumbo9k
+The maximum number of mbuf 9k jumbo clusters allowed.
+Increasing this to allow for at least 8192 extra clusters
+per interface can allow for an mtu of 8192.
 .El
 .Sh FILES
 .Bl -tag -width /dev/led/igb*
-- 
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