I swapped from a bridge adsl modem setup (the connection is defined and terminates as ppp0 on my Linux box) to a ADSL Router setup where the username and password is in the ADSL Router itself.
The problem was that my Linux box still had the pppoe connection defined and started on boot. I used pppoeconf to configure it but there didn’t seem to be an option in pppoeconf to delete it once configured.
The fix is open /etc/network/interfaces and comment out the entry as shown
auto lo iface lo inet loopback #auto dsl-provider #iface dsl-provider inet ppp #pre-up /sbin/ifconfig eth0 up # line maintained by pppoeconf #provider dsl-provider iface eth0 inet static address 10.244.139.25 netmask 255.255.255.0 gateway 10.244.139.253 auto eth0