From owner-freebsd-net Wed Jun 13 22:46:11 2001 Delivered-To: freebsd-net@freebsd.org Received: from shuttle.wide.toshiba.co.jp (shuttle.wide.toshiba.co.jp [202.249.10.124]) by hub.freebsd.org (Postfix) with ESMTP id 0238F37B403 for ; Wed, 13 Jun 2001 22:46:07 -0700 (PDT) (envelope-from jinmei@isl.rdc.toshiba.co.jp) Received: from localhost ([3ffe:501:100f:10c1:49b8:5b1:e9c7:765d]) by shuttle.wide.toshiba.co.jp (8.9.1+3.1W/8.9.1) with ESMTP id OAA10544; Thu, 14 Jun 2001 14:46:38 +0900 (JST) Date: Thu, 14 Jun 2001 14:43:31 +0900 Message-ID: From: JINMEI Tatuya / =?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?= To: raviprasad20@netscape.net Cc: freebsd-net@FreeBSD.ORG Subject: Re: transition mechanism 6 to 4 In-Reply-To: <2438AE8B.28551050.9513E96F@netscape.net> References: <2438AE8B.28551050.9513E96F@netscape.net> User-Agent: Wanderlust/2.5.8 (Smooth) Emacs/21.0 Mule/5.0 (SAKAKI) Organization: Research & Development Center, Toshiba Corp., Kawasaki, Japan. MIME-Version: 1.0 (generated by SEMI 1.13.7 - "Awazu") Content-Type: text/plain; charset=US-ASCII X-Dispatcher: imput version 980905(IM100) Lines: 17 Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org >>>>> On Wed, 13 Jun 2001 03:46:15 -0400, >>>>> raviprasad20@netscape.net said: > Assume that a ipv6 packet has to travel through a ipv4 network to an ipv6 destination host. > As usual the appropriate routing entry is found for the destination address & nd6_output through the function pointer calls the appropriate output function fo the interface to transmit the packet( ifp->if_output). > (Since tunneling is implemented in freebsd through the gif interfaces & configured by the user for configured tunneling) For a gif interface gif_output() is called. > I believe that for a ipv4 destination tunnel end point gif output is going to construct a ipv4 encapsulation header & it will call ip_output() to send the packet. The ipv4 routing table will be used to send the packet to the appropriate host based on the destination ipv4 address given to the gif interface. > Kindly inform me if my understanding is correct. Yes, your understanding is correct. JINMEI, Tatuya Communication Platform Lab. Corporate R&D Center, Toshiba Corp. jinmei@isl.rdc.toshiba.co.jp To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message