Draytek Vigor2600Ge Introduction Manual page 28

For PPPoE/PPPoA users, please check that the user name and password are correct, as
provided by your ISP.
For MPoA (RFC1483/2684) mode users, please check that the WAN IP / Gateway /
Subnet mask is set correctly, or that your ISP requires using DHCP client to obtain IP
address automatically.
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