<div>Hi Srinidhi,</div>
<div>I think, when Ref1 host pings it knows its MTU, ping with size of 1=
500 will be fragmented from REF1 host itself, so there will not be any &=
quot;too big message" at network2. But as the target host MTU is =
1500, it will try to respond reply 1500 MTU size, that time Tar router will=
send a Too big message to Network1.</div>
<div> </div>
<div>Are you not seeing "too big messaage at Network1"?</div>
<div>What is the Tar router you are using?<br>If you share your network1 an=
d network2 dump, i may dig bit more on this.</div>
<div> </div>
<div>Regards,</div>
<div>Arul<br><br></div>
<div class="gmail_quote">On Tue, May 26, 2009 at 7:03 AM, wang_jiabo <spa=
n dir="ltr"><<a href="mailto:jiabwang@redhat.com">jiabwang@redhat.co=
m</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0=
px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div>
<div></div>
<div class="h5">Srinidhi Gopal wrote:<br>
<blockquote class="gmail_quote" style="PADDING-LEFT: 1ex; MARGIN: 0px 0=
px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">Hi,<br><br>Has anyone used NetBS=
D machine for IPv6 Phase 2 Interoperability Testing?<br><br>We are using Ne=
tBSD 4.0.1 as the other Target node for testing our product.<br>
<br>The following 2 test cases under PMTU category are failing.<br><br>*Fai=
lures:*<br><br>IP6Interop 1.6a<br>IP6Interop 1.6b<br><br>*Test Setup:*<br><=
br> TH1 / TR2 |<br>-------=
------------------- (Network1) MTU 1500<br>
|<br>TR1<br> |<br>--------------------------- (Network2) MTU 1280<br>=
|<br> Ref-Host1 <b=
r>*Observations:*<br><br>* The max PMTU size in NetBSD is 1280.<br><br>* =
When we transmit echo requests from Ref-Host1 to TH1/TR2 with data size =
1500, No "Packet Too Big" Messages are sent by our Router (TR1) s=
ince the packets (size greater than 1280) are by default fragmented irrespe=
ctive of the MTU size configured on the interface.<br>
<br>* Because of this behaviour of NetBSD stack, We are unable to complete =
the interop testing of our product.<br><br>Kindly help us in resolving this=
issue.<br><br>-- <br>Regards,<br>Srinidhi<br></blockquote></div></div>
I used NetBSD is no problem, I think REF-Host1 can any OS such as windows 2=
008, redhat linux.<br>only TAR-Host2 should only use NetBSD and FreeBSD.<br=
><br></blockquote></div><br>