[c-nsp] LNS router options

[Andrew Jones]

"They are "business" users, so do not expect the services to be flogged, but I like to over engineer just in case."

Being business customers, i would imagine (or if i were the customer i would expect it) that you have contracted SLA's for perfomance including any oversubscription ratios for the services.

Thus perhpas required throughput should be considired in contractual obligations rather than real world use patterns.

just my 2 cents..

Cheers,
Andrew

________________________________________
From: cisco-nsp-bounces at puck.nether.net [cisco-nsp-bounces at puck.nether.net] On Behalf Of John Elliot [johnelliot67 at hotmail.com]
Sent: Friday, 13 January 2012 4:27 PM
To: td_miles at yahoo.com; cisco-nsp
Subject: Re: [c-nsp] LNS router options

Thanks Tony - Always a hard thing to gauge, but initially 100 ADSL2 tails, plus some (~10) 10M eth tails...what that equates to in aggregate traffic is up for debate ;)

They are "business" users, so do not expect the services to be flogged, but I like to over engineer just in case.

Ill have a look at the 7301/7201 also - thanks



Date: Thu, 12 Jan 2012 20:37:36 -0800
From: td_miles at yahoo.com
Subject: Re: [c-nsp] LNS router options
To: johnelliot67 at hotmail.com; cisco-nsp at puck.nether.net

Hi John,
The main thing you need to look at is not the number of DSL/PPP sessions but the aggregate traffic (Mbps) through the router. This will drive your decision.
Any idea on the amount of traffic you're expecting across your DSL sessions ?
If you're looking at 3RU then you'd probably be better sticking with 7200. You could always go with 7201/7301 (both 1RU) if you're short on space and don't need anything more than a few GE ports.

regards,Tony.


       From: John Elliot <johnelliot67 at hotmail.com>
 To: cisco-nsp <cisco-nsp at puck.nether.net>
 Sent: Friday, 13 January 2012 2:07 PM
 Subject: Re: [c-nsp] LNS router options


Thanks Hotmail - Ill resend to accommodate the (lack of) formatting..

Have a potential new pop that we are looking to terminate dsl tails(+MPLS,MPBGP, single Inet(full table), and some ethernet tails) - Have some space restrictions(RU)

Looking for some "real life" experience with the following platforms(Or
 alternatives?) on how many dsl tails they can support:

2851 - Cisco stated performance: 220,00PPS (2RU)

2951 - Cisco stated performance: 580,000PPS (2RU) but assume quite $$?

3845 - Cisco stated performance: 500,00PPS (3RU?)

3925 - Cisco stated performance: 833,000PPS(3RU?) but assume quite $$?


(NB would max out the ram on them for the bgp table)

Initially we are looking at ~100 dsl tails, with growth to 150 in 6months....are we better off looking at the old faithful 7200?

Cheers



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