We're moving a client from multiple ADSLs to an EoC connection
Using this new connection, most websites work, however some of the big ones don't. cisco.com is fine, so is google.com, Microsoft.com etc.
amazon.com goes to a blank page, speedtest.net can be pinged and tracert however browsing to it fails (as it rediects to another site). Some pages show only the text, as the graphics are located elsewhere.
This looks like its going to be a simple setting missing, though it's got me stumped, so appreciate any help.
Solved! Go to Solution.
A lot of ADSL configs use an MTU of 1500, so there is nothing to configure.
PPPoE (which I can see you using) has an 8 byte overhead. You said you moved connections, so you just lost 8 bytes that you didn't used to.
This will mean if you try and download anything with a size between 1492 and 1500 the packet will now get dumped. Some web servers do "black hole detection", so by their good management and a bit of luck you can see those sites. Others use a permanently lower MSS to catch miss-configurations like this one. Most don't, and you can't see those web sites.
However the best fix is not to rely on luck, and configure the correct MTU and do an MSS adjustment to catch the remaining issues.
If it works (and I think there is a pretty good chance) please mark my answer as correct.