PPPOE additional subnet

Hi,
I've a server running Debian 6.0.10.
Recently I've changed ISP provider and now I've provider VDSL modem 
running in bridge mode which require PPPOE.
I've configured connection accroding to https://wiki.debian.org/PPPoE 
and it's running fine.
eth0 is connected to VDSL modem
eth1 is connected to LAN

During pppoe initialization I receive my static IP 78.a.b.c
I've also assigned additional IP subnet 78.d.e.f/29.

I can add additional IP's to my ppp0 interface
ip a a 78.d.e.g/29 dev ppp0
and this is running fine. IP is reachable from the internet etc.

What I'm looking for is proper, debian-way to add this additional IP's 
into configuration, so they would be added to ppp0 automatically.
I was looking for a while in the internet but I didn't find any guide.
I've tried standard way in /etc/network/interfaces, but it's not 
working:

/etc/network/interfaces
auto lo eth0 eth1
iface lo inet loopback

iface eth0 inet manual

iface eth1 inet static
address 192.168.k.1
netmask 255.255.255.0

auto netia
iface netia inet ppp
pre-up /sbin/ifconfig eth0 up # line maintained by pppoeconf
provider netia
up ip addr add 78.d.e.g/29 brd 78.d.e.m dev ppp0 label ppp0:g
up ip addr add 78.d.e.h/29 brd 78.d.e.m dev ppp0 label ppp0:h
up ip addr add 78.d.e.i/29 brd 78.d.e.m dev ppp0 label ppp0:i
up ip addr add 78.d.e.j/29 brd 78.d.e.m dev ppp0 label ppp0:j
up ip addr add 78.d.e.k/29 brd 78.d.e.m dev ppp0 label ppp0:k


Where should be those additional IP's added? Somewhere in /etc/ppp ?

BR,
Noe


-- 
--
Krzysztof Lew
[email protected]