[nsp] 7206 VXR for ADSL PPPoE Aggregation

[Ash Garg]

We are running VXR's and terminating around 1000 customers with a NPE-300
and 256M RAM. The only scaling issue (now resolved) was the use of checksums
which was en-forced by the downstream LNS.

This meant that the VXR would confirm the checksum and process switch the
traffic rather than CEF switching it. A hidden IOS command told the router
to ignore the checksum and this reduced the CPU utilization significantly.
IE from 90-95% to only 30-35%! Has been more stable since.

Regards,
Ash

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Ash Garg                             5/490 Northbourne Ave
Network Specialist                   DICKSON 2602
Internet Network Development
Telstra

Email: <<mailto:Ash.Garg@telstra.net>>
BH:  +612 6208 1994
Mob: 0408 687 642
Fax: +612 6248 6165

The best way to publicize a governmental or political
action is to attempt to hide it. -Mark B. Cohen
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-----Original Message-----
From: cisco-nsp-admin@puck.nether.net
[mailto:cisco-nsp-admin@puck.nether.net]On Behalf Of Dmitri Kalintsev
Sent: Tuesday, 22 October 2002 12:33 PM
To: cisco-nsp@puck.nether.net
Subject: Re: [nsp] 7206 VXR for ADSL PPPoE Aggregation


I won't give any suggestions regarding CPU scaling, but IOS-wise you may
want to look at latest 12.2B code.

On Mon, Oct 21, 2002 at 04:09:17PM +0200, Stefan M. Brandl wrote:
> On Mon, Oct 21, 2002 at 08:29:45AM -0500, Charles Hardin wrote:
> > Hello,
> >
> > Anyone out there using the 7206 VXR platform for PPPoE ADSL aggregation?
If
> > so, are there any issues I should be aware of that might affect
> > performance, connectivity, aaa, etc?
> >
>
> I'm also interested in this issue.
> CCO says that a VXR with NPE-300 an 256MB RAM can handle about 4000
> sessions.
> We are planing to terminate about 1000 Users on a 7200 (non-VXR)
> with NPE-150 and 128MB RAM.
> I think/hope that the NPE-150 is enough.
---end quoted text---

SY,
--
 CCNP, CCDP (R&S)                          Dmitri E. Kalintsev
 CDPlayer@irc               Network Architect @ connect.com.au
 dek @ connect.com.au    phone: +61 3 8687 5954 fax: 8414 3115
 http://-UNAVAIL-         UIN:7150410    cell: +61 414 821 382

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