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<p>Hi Adam,</p>
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<p>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.</p>
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<p>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.</p>
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<span style="font-size:10pt; font-family:Calibri,sans-serif; color:rgb(31,73,125)">Kindest Regards,</span></p>
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<span style="font-size:10pt; font-family:Calibri,sans-serif; color:rgb(54,95,145)">Nathan Brookfield (VK2NAB)</span></p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> AusNOG <ausnog-bounces@lists.ausnog.net> on behalf of Adam Baxter <adam1984@gmail.com><br>
<b>Sent:</b> Tuesday, 2 August 2016 3:35 PM<br>
<b>To:</b> AusNOG@lists.ausnog.net<br>
<b>Subject:</b> [AusNOG] Telstra ADSL MTU</font>
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<div>Hi All,<br>
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I have had 2 Customers in the last few weeks that have had MTU problems. This is my Dialer interface.<br>
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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">xxxx@direct.telstra.net</a><br>
ppp chap password 7 xxxxx<br>
end<br>
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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?<br>
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Regards,<br>
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Adam.<br>
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