Server address: 192.168.254.254
Remote address range: 192.168.254.0
i dont know what version you are using but i think you have a problem with your subnet mask 'pppoe units'
in your pppoe configureation
192.168.254.0 will be iether 24 25 26 27 28 29 30 as a subnet
you are better to make a 'pppoe units of say 192.168.254.128/25 and a gateway of 192.168.254.1
the pppoe gateway must lye outside of the 'pppoe units subnet'
post the snip of your pppoe xml. your problem looks like it is here and i am sure your logs will reinforce this