The problem is not with Ubuntu 8.04... its an OSI Layer 8 error (the tester). <div><br></div><div>Thanks Tahi for letting me post an OT here. </div><div><br><br><div class="gmail_quote">On Wed, Dec 17, 2008 at 4:35 PM, Rommel Laranjo <span dir="ltr"><<a href="mailto:rslaranjo@gmail.com">rslaranjo@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div>I have another problem, does anyone here knows some issues about Ubuntu 8.04 PMTU? It seems that it will not send Packet too big packet. :(</div>
<div><br></div><div><br></div><div><br><div class="gmail_quote"><div class="Ih2E3d">On Wed, Dec 17, 2008 at 4:30 PM, Rommel Laranjo <span dir="ltr"><<a href="mailto:rslaranjo@gmail.com" target="_blank">rslaranjo@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div></div><div><br><br><div class="gmail_quote">On Wed, Dec 17, 2008 at 1:31 PM, TCP IP <span dir="ltr"><<a href="mailto:tcp.ip.ip6@gmail.com" target="_blank">tcp.ip.ip6@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<br>Hello,<br><br>Even when i test i got 33% of packet loss., but i think that is worng.<br>becuse the n/w topology looks as follows.<br><br> MC1<br> |<br>----------+------------+--------------------- N/W1 MTU 1500<br>
| <br> MC2<br> |<br>---------+----------------+-------------------- N/W2 MTU 1280<br> |<br> MC3<br> |<br>-----+-------------------+----------------------- N/W3 MTU 1500<br>
|<br> MC4<br> <br>In script we ping 3 time from MC4 to MC1 as follows.<br>Ping -c 1 -c 1452 MC1 ( 100% packet loss)<br>Ping -c 1 -c 1452 MC1 ( 100% packet loss)<br>Ping -c 3-c 1452 MC1 ( 33% packet loss)<br>
<br>Yes, 1st ping will get too big messge from MC3 and MC4 will reduce its PMTU to 1280.<br> and 2nd ping will reach MC1. The MC1 will try to reply with MTU 1500, so it also will get Too big message from MC2.( 2packet lost )</blockquote>
</div></div></div></blockquote><div> </div></div>I think MC1 can get PMTU from the first ICMPv6 Echo request that it received so it will not get Packet too big from MC2 when it sends its reply. </div></div></blockquote><div>
<br></div><div>my mistake, yes, MC1 will also get too big message from MC2.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div><div class="gmail_quote">
<div><div></div><div class="Wj3C7c"><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div><div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><br>
<br>Now, MC1 and MC4 knows it PMTU, the last ping has to 0 % packet loss right?<br><br>Am i missiing anything here?<div><div></div><div><br><br><br><br><br><br> <div><span class="gmail_quote">On 12/17/08, <b class="gmail_sendername">Rommel Laranjo</b> <<a href="mailto:rslaranjo@gmail.com" target="_blank">rslaranjo@gmail.com</a>> wrote:</span><blockquote class="gmail_quote" style="margin-top:0;margin-right:0;margin-bottom:0;margin-left:0;margin-left:0.80ex;border-left-color:#cccccc;border-left-width:1px;border-left-style:solid;padding-left:1ex">
Thank you so much wang_jiabo for your reply. <div>So now I think there is something wrong with my setup cause I experience huge percentage of packet drop. <br></div><div>From my packet sniff on Network1, I've seen several ICMPv6 Echo reply but only few were received by TAR-Router1. </div>
<div><br></div><div>Thanks alot,</div><div><br></div><span><div>Rommel</div></span><div><span><div><br></div><div><br><br><div class="gmail_quote">On Wed, Dec 17, 2008 at 11:37 AM, wang_jiabo <span dir="ltr"><<a href="mailto:jiabwang@redhat.com" target="_blank">jiabwang@redhat.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin-top:0;margin-right:0;margin-bottom:0;margin-left:0.80ex;border-left-color:#cccccc;border-left-width:1px;border-left-style:solid;padding-left:1ex">Hello, Rommel Laranjo:<br>
my test result for 1.6 part D:<br><br> Rommel Laranjo ping6 -I eth0 -c 3 -s 1500 3ffe:501:ffff:104::1 > 1.6.D.RedHat.Cisco.result<br><br> PING 3ffe:501:ffff:104::1(3ffe:501:ffff:104::1) from 3ffe:501:ffff:100:210:18ff:fe32:56e2 eth0: 1500 data bytes<br>
From 3ffe:501:ffff:100::1 icmp_seq=0 Packet too big: mtu=1280<br> 1508 bytes from 3ffe:501:ffff:104::1: icmp_seq=1 ttl=62 time=2.06 ms<br> 1508 bytes from 3ffe:501:ffff:104::1: icmp_seq=2 ttl=62 time=2.13 ms<br><br> --- 3ffe:501:ffff:104::1 ping statistics ---<br>
3 packets transmitted, 2 received, +1 errors, 33% packet loss, time 2000ms<br> rtt min/avg/max/mdev = 2.061/2.100/2.139/0.039 ms, pipe 2<br><br><br> [H3CMSR2020]ping ipv6 -s 1500 3ffe:501:ffff:100:210:18ff:fe32:56e2<br>
PING 3ffe:501:ffff:100:210:18ff:fe32:56e2 : 1500 data bytes, press CTRL_C to break<br>
Reply from 3FFE:501:FFFF:100:210:18FF:FE32:56E2<br> bytes=1500 Sequence=1 hop limit=62 time = 2 ms<br> Reply from 3FFE:501:FFFF:100:210:18FF:FE32:56E2<br> bytes=1500 Sequence=2 hop limit=62 time = 2 ms<br>
Reply from 3FFE:501:FFFF:100:210:18FF:FE32:56E2<br>
bytes=1500 Sequence=3 hop limit=62 time = 3 ms<br> Reply from 3FFE:501:FFFF:100:210:18FF:FE32:56E2<br> bytes=1500 Sequence=4 hop limit=62 time = 3 ms<br> Reply from 3FFE:501:FFFF:100:210:18FF:FE32:56E2<br>
bytes=1500 Sequence=5 hop limit=62 time = 3 ms<br>
<br> --- 3ffe:501:ffff:100:210:18ff:fe32:56e2 ping statistics ---<br> 5 packet(s) transmitted<br> 5 packet(s) received<br> 0.00% packet loss<br> round-trip min/avg/max = 2/2/3 ms<br><br> I hope this can help you.<br>
<font color="#888888"> jiabo</font><div><div><br><br><blockquote class="gmail_quote" style="margin-top:0;margin-right:0;margin-bottom:0;margin-left:0.80ex;border-left-color:#cccccc;border-left-width:1px;border-left-style:solid;padding-left:1ex">
Hello to all tahi users,<br><br> I know this post is not related to using the TAHI script because I'm doing manual IPv6 Interoperability Testing.<br> But I just hope someone would be kind enough to share their expert knowledge about Interoperability Testing.<br>
<br> I am now performing Test IP6Interop.1.6: Path MTU Discovery and Fragmentation Part D steps 23 to 27. My question is this, is it normal to see packet loss about 90% or sometimes 80% when I ping from TAR-Router1 to TAR-Host1 ? and from TAR-Host1 to TAR-Router1 ? <br>
If there would be packet loss, how much would be the expected value? <br> I gladly appreciate your replies.<br><br><br> Thanks,<br><br> Rommel<br><br></blockquote><br><br></div></div></blockquote></div><br></div></span></div>
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