[AusNOG] back of envelope sizing calculations

Skeeve Stevens skeeve at eintellego.net
Thu Mar 5 16:13:45 EST 2009


Even a 7200-NPE300 is a good low end (sub 1000) LNS for low speed tails (Dial, DSL1, HSPDA, wifi)

The NPE225 was only just EOL'd on 23-Jul-07

...Skeeve

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From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Matthew Moyle-Croft
Sent: Thursday, 5 March 2009 3:56 PM
To: Craig Askings
Cc: ausnog at ausnog.net
Subject: Re: [AusNOG] back of envelope sizing calculations

Yep.
You can still just find a use for a Cisco 7206 with NSE-225.

Although our AGS+ hasn't been in production for A LONG time.

MMC

On 05/03/2009, at 2:58 PM, Craig Askings wrote:


I suspect many an ISP that started with a single 7200 and a switch, still
has it humming it away in their network years (and many expansions) later.
It just slowly gets pushed further to the edge over time.

Craig.

On Wed, March 4, 2009 11:20 pm, Matthew Moyle-Croft wrote:

Skeeve's recommendation is a good one:

7206VXR-NPE-G1s are the swiss army knife - well debugged, well
understood, easy to obtain parts new and after market and will be
supported for a long time to come and easily handle full BGP tables.

Even though they're no longer something we use in our core they are
now excellent PE routers for terminating customer sessions or smaller
LNSes etc.  We've got a frightening number still humming away and
unlikely to be replaced.  Because of this Cisco are unlikely to EOL
them for a LONG time to come (think of the ROI of that platform for
them).

(We've got many dozens - I wouldn't want to try and count - it'd take
too long).

The news G2s are nice as they have an extra GE port and much faster
VPN BUT remember they need SFPs (SFP slots only for 2 of the ports).

MMC



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