1.\" $KAME: gif.4,v 1.28 2001/05/18 13:15:56 itojun Exp $ 2.\" 3.\" Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: --- 13 unchanged lines hidden (view full) --- 22.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28.\" SUCH DAMAGE. 29.\" |
30.\" $FreeBSD: head/share/man/man4/gif.4 193664 2009-06-07 23:00:40Z hrs $ |
31.\" |
32.Dd June 8, 2009 |
33.Dt GIF 4 34.Os 35.Sh NAME 36.Nm gif 37.Nd generic tunnel interface 38.Sh SYNOPSIS 39.Cd "device gif" 40.Sh DESCRIPTION --- 210 unchanged lines hidden (view full) --- 251device does not translate ICMP messages for the outer header into the inner header. 252.Pp 253In the past, 254.Nm 255had a multi-destination behavior, configurable via 256.Dv IFF_LINK0 257flag. 258The behavior is obsolete and is no longer supported. |
259.Pp 260On 261.Fx 2626.1, 6.2, 6.3, 7.0, 7.1, and 7.2 263the 264.Nm 265sends and receives incorrect EtherIP packets with reversed version 266field when 267.Xr if_bridge 4 268is used together. As a workaround on this interoperability issue, the 269following two 270.Xr ifconfig 8 271flags can be used: 272.Bl -tag -width "accept_rev_ethip_ver" -offset indent 273.It accept_rev_ethip_ver 274accepts both correct EtherIP packets and ones with reversed version 275field, if enabled. If disabled, the 276.Nm 277accepts the correct packets only. This flag is enabled by default. 278.It send_rev_ethip_ver 279sends EtherIP packets with reversed version field intentionally, if 280enabled. If disabled, the 281.Nm 282sends the correct packets only. This flag is disabled by default. 283.El 284.Pp 285If interoperability with the older 286.Fx 287machines is needed, both of these two flags must be enabled. |