Disconnect and reconnect pppoe from shell

[tonysud]

Hi
I have a pppoe interface with dynamic ip from my isp
I need a command through shell to force the change of ip
something like disconnct and connect pppoe
help me
thanks

[tonysud]

I found this command:

/usr/local/sbin/pfSctl -c 'interface reload wan'

but it seems it doesn't work in my case

interface description of pppoe interface: DYN1
if I do ifconfig I see pppoe0 interface
it's using em2 physical interface

which is the command to try in my case?
please help me