<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="Microsoft Word 15 (filtered medium)">
<!--[if !mso]><style>v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style><![endif]--><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman",serif;
color:black;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman",serif;
color:black;}
pre
{mso-style-priority:99;
mso-style-link:"HTML Preformatted Char";
margin:0cm;
margin-bottom:.0001pt;
font-size:10.0pt;
font-family:"Courier New";
color:black;}
span.HTMLPreformattedChar
{mso-style-name:"HTML Preformatted Char";
mso-style-priority:99;
mso-style-link:"HTML Preformatted";
font-family:Consolas;
color:black;}
p.msonormal0, li.msonormal0, div.msonormal0
{mso-style-name:msonormal;
mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0cm;
mso-margin-bottom-alt:auto;
margin-left:0cm;
font-size:12.0pt;
font-family:"Times New Roman",serif;
color:black;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
</head>
<body bgcolor="white" lang="EN-AU" link="blue" vlink="purple">
<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">Hi,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">We have client’s that have this constant problem. I tweak the MTU to 1400 sometimes… and then everyone works magically. 1492 causes
havoc. I once set It to 1500, and it worked.. Don’t ask.. I took it to 1450 (I think) didn’t dare leave it on 1500 for ADSL.
<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">We’ve moved away from Cisco to SOPHOS, and there’s no mss-adjust. We use a TD-8817 in bridge mode. We have tried other bridge
modems, no difference. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US">What’s people recommendation for us non – cisco souls? Is it the bridge causing this? Don’t see how, it’s dialler level. Unless
I’m being blond for something obvious.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif">Burt Mascareigne<br>
Mobile</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Arial",sans-serif"> 0414 450 962 <b>Office</b> (02) 9965 5422<br>
<b>Address</b> Level 19, 1 O’Connell Street, Sydney NSW 2000<br>
<b>Web</b> <a href="http://www.stormnetwork.com.au/"><span style="color:#1F497D">http://www.stormnetwork.com.au</span></a></span><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p></o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext;mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span lang="EN-US" style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"> AusNOG [<a href="mailto:ausnog-bounces@lists.ausnog.net">mailto:ausnog-bounces@lists.ausnog.net</a>]
<b>On Behalf Of </b>Shane Short<br>
<b>Sent:</b> Tuesday, 2 August 2016 8:03 PM<br>
<b>To:</b> Adam Baxter <<a href="mailto:adam1984@gmail.com">adam1984@gmail.com</a>><br>
<b>Cc:</b> <a href="mailto:AusNOG@lists.ausnog.net">AusNOG@lists.ausnog.net</a><br>
<b>Subject:</b> Re: [AusNOG] Telstra ADSL MTU<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt">Is there a particular reason you're running 1452 on the dialer? Was it a troubleshooting step, or?<br>
<br>
Adam Baxter wrote:<o:p></o:p></p>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<div>
<p class="MsoNormal">Thank you!<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">On 2 August 2016 at 15:39, Nathan Brookfield <<a href="mailto:Nathan.Brookfield@simtronic.com.au" target="_blank">Nathan.Brookfield@simtronic.com.au</a>> wrote:<o:p></o:p></p>
<blockquote style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt">
<div>
<div>
<p style="background:white"><span style="font-family:"Calibri",sans-serif">Hi Adam,<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif">As a rule your mss-adjust should be 40 bytes lower than your actual MTU. In theory you should have 1492 on the dialer and and an mss-adjust of 1452 on the LAN interface.<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif">If you're going to keep 1452 on the Dialer as the MTU you should adjust the mss appropriately. See if that helps at all.<o:p></o:p></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
<div>
<div>
<p style="margin:0cm;margin-bottom:.0001pt;background:white"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Kindest Regards,</span><span style="color:#212121"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt;background:white"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#365F91">Nathan Brookfield (VK2NAB)</span><span style="color:#212121"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt;background:white"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#365F91"> </span><span style="color:#212121"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt;background:white"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#365F91">Chief Executive Officer</span><span style="color:#212121"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt;background:white"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#365F91">Simtronic Technologies Pty Ltd</span><span style="color:#212121"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt;background:white"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#365F91"> </span><span style="color:#212121"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt;background:white"><b><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#365F91">Local:</span></b><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#365F91"> (02) 4749 4949 <b>|</b> <b>Fax:</b> (02)
4749 4950 <b>|</b> <b>Direct:</b> (02) 4749 4951</span><span style="color:#212121"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt;background:white"><b><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#365F91">Web</span></b><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#365F91">: <a href="http://www.simtronic.com.au/" target="_blank"><span style="color:#365F91">http://www.simtronic.com.au</span></a> <b>|</b> <b>E-mail</b>: <a href="mailto:nathan.brookfield@simtronic.com.au" target="_blank"><span style="color:#365F91">nathan.brookfield@simtronic.com.au</span></a></span><span style="color:#212121"><o:p></o:p></span></p>
<p style="margin:0cm;margin-bottom:.0001pt;background:white"><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:#365F91"> </span><span style="color:#212121"><o:p></o:p></span></p>
</div>
</div>
<div>
<div class="MsoNormal" align="center" style="text-align:center;background:white">
<span style="font-family:"Calibri",sans-serif">
<hr size="3" width="98%" align="center">
</span></div>
<div>
<p class="MsoNormal" style="background:white"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> AusNOG <<a href="mailto:ausnog-bounces@lists.ausnog.net" target="_blank">ausnog-bounces@lists.ausnog.net</a>>
on behalf of Adam Baxter <<a href="mailto:adam1984@gmail.com" target="_blank">adam1984@gmail.com</a>><br>
<b>Sent:</b> Tuesday, 2 August 2016 3:35 PM<br>
<b>To:</b> <a href="mailto:AusNOG@lists.ausnog.net" target="_blank">AusNOG@lists.ausnog.net</a><br>
<b>Subject:</b> [AusNOG] Telstra ADSL MTU</span><span style="font-family:"Calibri",sans-serif">
<o:p></o:p></span></p>
<div>
<p class="MsoNormal" style="background:white"><span style="font-family:"Calibri",sans-serif"> <o:p></o:p></span></p>
</div>
</div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Calibri",sans-serif">Hi All,<o:p></o:p></span></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Calibri",sans-serif">I have had 2 Customers in the last few weeks that have had MTU problems. This is my Dialer interface.<br>
<br>
interface Dialer0<br>
ip address negotiated<br>
no ip redirects<br>
no ip unreachables<br>
no ip proxy-arp<br>
ip mtu 1452<br>
ip nat outside<br>
ip virtual-reassembly<br>
encapsulation ppp<br>
load-interval 30<br>
dialer pool 1<br>
dialer-group 1<br>
no cdp enable<br>
ppp authentication chap callin<br>
ppp chap hostname <a href="mailto:xxxx@direct.telstra.net" target="_blank">xxxx@direct.telstra.net</a><br>
ppp chap password 7 xxxxx<br>
end<o:p></o:p></span></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Calibri",sans-serif"> I have never had any problems accessing websites until the last few weeks. Does anyone know what might have changed at the Telstra end? I had
to set "ip tcp adjust-mss 1452" on the Dialer interface to make it work. Never had to in the past with a number of other connections. Perhaps I should have all along?<o:p></o:p></span></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt;background:white"><span style="font-family:"Calibri",sans-serif">Regards,<o:p></o:p></span></p>
</div>
<p class="MsoNormal" style="background:white"><span style="font-family:"Calibri",sans-serif">Adam.<o:p></o:p></span></p>
<div>
<div>
<p class="MsoNormal" style="background:white"><span style="font-family:"Calibri",sans-serif"><o:p> </o:p></span></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<pre>_______________________________________________<o:p></o:p></pre>
<pre>AusNOG mailing list<o:p></o:p></pre>
<pre><a href="mailto:AusNOG@lists.ausnog.net">AusNOG@lists.ausnog.net</a><o:p></o:p></pre>
<pre><a href="http://lists.ausnog.net/mailman/listinfo/ausnog">http://lists.ausnog.net/mailman/listinfo/ausnog</a><o:p></o:p></pre>
</blockquote>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
</body>
</html>