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Setting up a Draytek 2820 router for BT Business ADSL

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  • Written by angusf
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To set the MTU size on a Draytek 2820 series router to work correctly with BT ADSL the following steps should be performed.

Telnet/SSH into the router (theres no GUI for MTU inexplicably).

Using the command 'wan ppp_mss' select the size you wish to use

> wan ppp_mss 1458

To check the value use the command 'wan ppp_mss ?'

> wan ppp_mss ?   
% wan ppp_mss <MSS size: 1000 ~ 1500>
% Now: 1458

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