about IPv6 PPPoE

[Bo Byrd]

20:1 seems very extreme.  From what I've seen a subscriber management
system can terminate around 32000 PVC's and can support 8000 active
PVC's, that's 4:1.  Of course for the best interests of the customers
you cant normally run it like that, for best performance you usually see
around 3:1 in datacenters with multiple SMS devices.  Surely 20:1 is in
reference to some other set of figures.

-Bo


-----Original Message-----
From: owner-6bone@ISI.EDU [mailto:owner-6bone@ISI.EDU] On Behalf Of
Christian de Larrinaga
Sent: Tuesday, April 30, 2002 5:00 AM
To: Bo Byrd; 6bone@ISI.EDU
Subject: RE: about IPv6 PPPoE 



> PPPoE lets service providers oversubscribe their DSL termination 
> routers.  If just regular bridged connections were used a router can 
> only handle so many (8000 for redback sms-1800 routers) of those 
> circuits.  With PPPoE the service provider can terminate many more 
> circuits since not everyone is using the system at the same time.  
> This greatly recudes the per-user cost of the equipment for the 
> service provider.  It also works the same as a dialup connection that 
> the user is already familiar with.  There really arent many problems 
> with PPPoE at all.  It's very more scalable than bridged RFC1483 
> operation.

so this is what is meant by ADSL contention ratio? e.g., BT in UK quote
20:1? is BT is over subscribing DSL termination routers 20x?

Christian

Christian de Larrinaga