UDP checksumming as well, and turned off if the MTU is too large.

1 files changed, 11 insertions, 4 deletions

diff --git a/share/man/man4/nge.4 b/share/man/man4/nge.4
index 582c4d6df37..fea7ec80bc4 100644
--- a/share/man/man4/nge.4
+++ b/share/man/man4/nge.4
@@ -1,4 +1,4 @@
-.\"	$OpenBSD: nge.4,v 1.2 2001/07/06 06:10:22 deraadt Exp $
+.\"	$OpenBSD: nge.4,v 1.3 2001/07/06 06:14:31 angelos Exp $
 .\" Copyright (c) 2001 Wind River Systems
 .\" Copyright (c) 1997, 1998, 1999, 2000, 2001
 .\"	Bill Paul <wpaul@bsdi.com>. All rights reserved.
@@ -64,9 +64,13 @@ copper cable.
 The DP83820 supports TBI (ten bit interface) and GMII
 transceivers, which means it can be used with either copper or 1000baseX
 fiber applications.
-The DP83820 supports TCP/IP checksum offload and
-VLAN tagging/insertion as well as a 2048-bit multicast hash filter
-and up to 4 pattern match buffers.
+The DP83820 supports
+.Xr ip 4 ,
+.Xr tcp 4 ,
+and
+.Xr udp 4
+checksum offload and VLAN tagging/insertion as well as a 2048-bit
+multicast hash filter and up to 4 pattern match buffers.
 .Pp
 Most cards also use the DP83861 10/100/1000 copper gigabit tranceiver
 chip, which supports autonegotiation of 10, 100 and 1000mbps modes in
@@ -79,6 +83,9 @@ Selecting an MTU larger than 1500 bytes with the
 utility configures the adapter to receive and transmit jumbo frames.
 Using jumbo frames can greatly improve performance for certain tanges,
 such as file transfers and data streaming.
+If the MTU is set to be larger than the NIC's transmit buffer
+(typically 8152 bytes), hardware output checksumming is disabled
+as the NIC cannot handle this case.
 .Pp
 The
 .Nm