[c-nsp] Router recommendation

[Tim DeVries]

With regards to PPPoE, if you are using L2TP to tunnel the PPPoE
sessions and terminating them over your DS3 on the 7206, you could
likely get away without completely changing platforms if you used
another PPPoE aggregation technology like the open-source L2TPNS
software.  This offloads a great deal of processing power from your 7200
series routers.  To give you an idea, we built a cluster using L2TPNS
and took the CPU of a 7206VXR w/ NPE400 down from 95% (1600 users
128k-512k sessions) to about 20% purely by forwarding the l2TP tunnels
that came in over our DS3/OC3 interfaces to the L2TPNS cluster (via
Ethernet interface) and terminating all of the PPPoE there instead of on
the router(s).
 
Our case might be slightly different as the incumbent Telco was
providing the LAC side of things while we had to take care of the LNS.
However the cluster solution is way more scalable (65,535 per cluster)
than any router solution and has been very stable to date once we got
the bugs worked out. 

Regards,
Tim


-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Arie Vayner
(avayner)
Sent: Thursday, September 14, 2006 2:33 AM
To: Rick Kunkel; cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Router recommendation

Rick,

NPE-G1 should be able to handle most of what you need. I say most and
not all just because of performance not being assured, as it really
varies as you turn more and more features.
I would suggest that you start using it, and get a better understanding
of the CPU usage profile you get with your specific application. It is
very easy to upgrade to NPE-G2, or just add another router (I would
recommend the later, as it would be more scalable - just using building
blocks).
Be sure you have enough memory for the BGP feeds and PPP sessions -
these are memory hungry applications. I would recommend a minimum of
512M and you might even consider 1G...

Arie 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Rick Kunkel
Sent: Thursday, September 14, 2006 08:07 AM
To: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Router recommendation

I've had (on and off-list) recommendations for the NPE-G2.  I also
forgot to specify what NPE I have now.  I have the NPE-G1 now, and we
had considered staying with it, but I thought I remember seeing
somewhere on this list (with a link to a site published by Cisco that
listed various routers and their theoretical packet or bit limits)
something that indicated to me that the NPE-G1 wasn't gonna cut it.  It
was a while ago though, and I may have misread it.  Perhaps I mistook
packets per second for bits per second.

Is the NPE-G1 possibly good enough for what I'll be throwing at it?  If
not, is the NPE-G2 a substantial step up?  Also, is it possible for me
to simply purchase a NPE-G2 and swap it with the NPE-G1 that I already
have in my 7206VXR chassis?

Thanks!

Rick

On Wed, 13 Sep 2006, Rodney Dunn wrote:

> Rick,
> 
> I don't work in the BB agg space a lot but it sounds to me like your 
> options would be:
> 
> 72xx with the new NPE-G2
> 
> or either a 10k box. I've worked on a 10k box handling over 25k 
> sessions running well over a gig before.
> 
> I'm sure others with them in deployment can give you some references.
> 
> Rodney
> 
> On Wed, Sep 13, 2006 at 05:36:43PM -0700, Rick Kunkel wrote:
> > Heya folks... I'm pretty dim on the upper lever Cisco gear, and 
> > we're in the market for something burlier than the 7206 we've 
> > currently got.  I need some suggestions for products...
> > 
> > The requirements:
> > 
> > 1. We're terminating a DSL Aggregation DS-3, so there must be an 
> > electrical and/or optical DS-3 module available for it.
> > 
> > 2.  At least 3 GigEthernet ports, either somewhat built-in or in
modules.
> > 
> > 3.  Capable of handling at least 3 full BGP routing tables.
> > 
> > 4.  Must be able to do operating-system-wise everything that our 
> > current
> > 7206 does, like "atm route-bridged ip" stuff and 802.1Q.  (I have a 
> > feeling this is kind of a "it goes without saying" type of 
> > requirement, but I wanted to be clear...)
> > 
> > 5.  Able to route/switch about 1Gbps from the various internet 
> > facing interfaces to the various internal facing interfaces.  (I'm 
> > sure this is not a simple answer, but unfortunately, that's about 
> > all I've got to go on right now.)
> > 
> > Any suggestions?
> > 
> > Thanks!
> > 
> > Rick Kunkel
> > 
> > 
> > 
> > 
> > _______________________________________________
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> > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > archive at http://puck.nether.net/pipermail/cisco-nsp/
> 



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