[cisco-bba] Problems moving configuration from vpdn-group to bba-group

[Goncalo Costa]

Hello all.

I am trying to migrate my current BRAS configuration from
vpdn-group to bba-group.

I have users in this BAS using both PPPoA and PPPoE although
they all arrive in ATM interfaces.

Relevant configurations follow.

Current working configuration (with vpdn-group):

-------------------------------------------
!
vpdn enable
vpdn aaa attribute nas-port vpdn-nas
vpdn ip udp ignore checksum
!
vpdn-group 1
 accept-dialin
  protocol pppoe
  virtual-template 1
 pppoe limit per-mac 3
 pppoe limit per-vc 3
 pppoe limit per-vlan 2000
!
pppoe-forwarding
!
vc-class atm ADSL-4M
  ubr 4096 4096
  encapsulation aal5autoppp Virtual-Template2
!
interface ATM2/0.1 multipoint
 description ADSL-4M
 class-int ADSL-4M
 range pvc 24/32 24/64
!
-------------------------------------------

Failing configuration (with bba-group):

-------------------------------------------
!
bba-group pppoe PPPOE-TAG
 virtual-template 1
 sessions per-vc limit 3
 sessions per-mac limit 3
 sessions per-vlan limit 2000
!
pppoe-forwarding
!
vc-class atm ADSL-4M
  protocol pppoe group PPPOE-TAG
  ubr 4096 4096
  encapsulation aal5autoppp Virtual-Template2 group PPPOE-TAG
!
interface ATM2/0.1 multipoint
 description ADSL-4M
 class-int ADSL-4M
 range pvc 24/32 24/64
  protocol pppoe group PPPOE-TAG
!
-------------------------------------------

In both cases I have:

-------------------------------------------
!
interface Virtual-Template1
 description TemplatePPPoE
 ip unnumbered Loopback1
 ip mtu 1492
 ip tcp adjust-mss 1452
 qos pre-classify
 no peer default ip address
 ppp authentication pap chap
!
interface Virtual-Template2
 description TemplatePPPoA
 ip unnumbered Loopback1
 ip tcp adjust-mss 1452
 ppp authentication pap chap
!
-------------------------------------------

I'm running c7200-js-mz.123-11.T2

No user gets connected with this configuration using bba-group.
I've tried debugging and I got this:

Aug 18 07:19:46.127: PPPoE 0: I PADI  R:0011.c483.435f L:ffff.ffff.ffff 24/34  ATM2/0.1

Any help would be appreciated.

Thanks in advance
Goncalo