[cisco-bba] PPPoE and VLAN ranges

[Clayton Zekelman]

Hello!

I'm trying to terminate PPPoE Sessions on a Cisco 7200 series router 
(Cisco IOS Software, 7200 Software (C7200-IS-M), Version 12.4(16), 
RELEASE SOFTWARE (fc1))

Everything works fine if I use an individual subinterface for each VLAN:

   interface FastEthernet1/0
    description DSLAM1 Uplink Port
    no ip address
    no ip redirects
    no ip unreachables
    no ip proxy-arp
    load-interval 30
    duplex full
   !
  interface FastEthernet1/0.16
   encapsulation dot1Q 16
   pppoe enable group global
  !
.... deleted ....
  interface FastEthernet1/0.879
   encapsulation dot1Q 20
   pppoe enable group global

When I switch to the IDBless version, with no subinterfaces:

interface FastEthernet1/0
  description DSLAM1 Uplink Port
  no ip address
  no ip redirects
  no ip unreachables
  no ip proxy-arp
  load-interval 30
  duplex full
  vlan-range dot1q 1 879 native
   pppoe enable group global
   exit-vlan-config
  !
!

The sessions get stuck in the LCP stage.

I've tried it both with and without the "native" option on the 
vlan-range statement.

The particular session I'm terminating is being tunnel switched back 
out through L2TP to another LNS.

Any help would be appreciated.  I hate the idea of creating 864 
subinterfaces.  Just doing a "sho run" brings the router to its knees 
for a bit - and our RANCID poll every hour.. well...




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Clayton Zekelman
Managed Network Systems Inc. (MNSi)
344-300 Tecumseh Rd. E.
Windsor, Ontario
N8X 5E8

tel. 519-985-8410
fax. 519-985-8409