[cisco-bba] Broadband Aggregation - Cisco 10000

[Andy Schutz (aschutz)]

Vusi,
 
You are correct, the PA-A3 does have a limitation of 4000 *active* VCs but
you can configure more than this using the feature called "create on-demand"
or ATM PVC autoprovisioning.  There are a number of ways of applying this
(through a vc-class, through a vc-range, applied directly to the interface,
or a combination of these).
 
For the Cisco 10000, you are able to use create on-demand within a pvc-range
or inside a vc-class that is assigned to the pvc-range which basically
enables the creation of VCs when the router receives ATM cells from the
other end of the VC.  This conserves resources and CPU and enables VC
oversubscription as you are looking for.  I would suggest looking at the
following for more details:
 
http://www.cisco.com/en/US/partner/products/hw/routers/ps133/products_config
uration_guide_chapter09186a0080174a45.html
 
Hope that helps,
 
Andy

-----Original Message-----
From: Vusi Ndebele [mailto:vusi at webdevuk.com] 
Sent: Friday, December 10, 2004 2:54 PM
To: aschutz at cisco.com; cisco-bba at puck.nether.net; cisco-nsp at puck.nether.net
Subject: RE: [cisco-bba] Broadband Aggregation - Cisco 10000



Andy, how does the ATM oversubscription work? In the proof-of-concept, we
have used a 7206 VXR w NPE400, we configure an ATM subinterface with an atm
pvc-range. On the current PA-A3's, the maximum VC's is 4000, to be honest
I've not tried configuring any more than this. So is the VC limit on the PA/
Line card for 'active' or 'configured' VCs?

If oversubscription means that you can configure more PVC's than the defined
maximum for the PA/ Line card then that is useful, however if it just means
you can oversubscribe the SCR on VBR-nrt PVCs then that's not so useful in
my scenario.

 

Vusi

 


  _____  


From: Andy Schutz (aschutz) [mailto:aschutz at cisco.com] 
Sent: 10 December 2004 16:38
To: 'Vusi Ndebele'; cisco-bba at puck.nether.net; cisco-nsp at puck.nether.net
Subject: RE: [cisco-bba] Broadband Aggregation - Cisco 10000

 

Vusi,

 

The Cisco 10000 is an excellent alternative to other vendor's BRAS options.
The Cisco 10000 offers support for up to 61.5k sessions and does allow for
ATM PVC oversubscription that would accommodate your requirements.  I'll let
Service Providers on this alias attest to their experience with the Cisco
10000 but I wanted to reaffirm that the Cisco 10000 does perform as a BRAS
and does it very well (I'm a bit biased).

 

Cheers,

 

Andy

-----Original Message-----
From: cisco-bba-bounces at puck.nether.net
[mailto:cisco-bba-bounces at puck.nether.net] On Behalf Of Vusi Ndebele
Sent: Thursday, December 09, 2004 11:23 AM
To: cisco-bba at puck.nether.net; cisco-nsp at puck.nether.net
Subject: [cisco-bba] Broadband Aggregation - Cisco 10000

 

Is anybody on the list using the Cisco 10k in a broadband aggregation
environment? I'm interested in any feedback on the box. I am looking to
terminate up to 40000 active PPPoA sessions over 80000 configured PVCs
coming in on either multiple STM1 or STM4 ATM bearers. What is the Cisco
answer to the Redback 10000 and or the SmartEdge400/800?

 

 

Regards

 

Vusi

 

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