MTU fix for "dropped connection" with MacBook Airport/Ethernet & Belkin N+

I have just switched to a Belkin N+ router, a really nice, fast machine with good range extending to all rooms of the house. However, some websites (eg. TESCO online grocery shopping) were timing out with a message like "Safari can’t open the page “https://secure.tesco.com/register/default.aspx?vstore=99” because the server unexpectedly dropped the connection, ...<etc>...". All help in these pages and elsewhere on the web were of no avail. However, Belkin support nailed it in one with this helpful set of instructions for the Mac:
- Click “Apple” on to the top left corner of the screen.
- Click “System preferences”.
- Click “Network”.
- Click "the lock" to make changes and enter the MacBook Admin username and password
- Click “Airport” on to the left side of the screen.
- Click “Advanced”.
- Click “Ethernet” tab.
- Change “Configure:” to “Manually (Advanced)”.
- Change the “MTU” to “Custom” and set the MTU to “1400”.
- Click “OK” and “Apply”.
Worked a treat.
Doug.

Chris.J.G., Welcome to the discussion area!
Is there something I need to do with the Airport itself? I can't find an MTU setting field in the Airport Utility.
No. None of Apple's base stations change the MTU of packets passing through therefore there is no MTU option to change.

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