[AusNOG] back of envelope sizing calculations

[Matthew Moyle-Croft]

For "much faster VPN" read "much faster CPU".

Trying to think about too many things at once.

MMC

On 05/03/2009, at 2:50 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
>
> On 05/03/2009, at 2:15 PM, Skeeve Stevens wrote:
>
>> 7200-G1 - 512mb mtp (max throughput)
>> 7200-G2 - 1024mb mtp
>>
>> They have 3 * GE
>>
>> 2851 with an extra GE would be pushing it with 112mb mtp
>>
>> 3825 - need two extra gig ports - 179 mtp
>> 3845 - need two extra gig ports - 256 mtp
>>
>> A G1 which can either be in 7200 form or 7301 form.
>>
>> A G2 can be in 7204/6 form or 7201 form.
>>
>> HWIC-GE cards are more expensive that PA-GE's.
>>
>> My recommendation is a 7204VXR-NPE-G1 for cost, expandability (can  
>> go to 4 GE - maybe 5 if the bandwidth points aren't counted from  
>> slot 0 NPE), or a G2 if you can afford it.
>>
>>
>> ...Skeeve
>>
>> --
>> Skeeve Stevens, CEO/Technical Director
>> eintellego Pty Ltd - The Networking Specialists
>> skeeve at eintellego.net / www.eintellego.net
>> Phone: 1300 753 383, Fax: (+612) 8572 9954
>> Cell +61 (0)414 753 383 / skype://skeeve
>> --
>> NOC, NOC, who's there?
>>
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>>> -----Original Message-----
>>> From: ausnog-bounces at lists.ausnog.net [mailto:ausnog-
>>> bounces at lists.ausnog.net] On Behalf Of Michael Bethune
>>> Sent: Thursday, 5 March 2009 1:17 PM
>>> To: ausnog at ausnog.net
>>> Subject: [AusNOG] back of envelope sizing calculations
>>>
>>> Hiya,
>>>
>>> Just doing some back of the envelope calculations and I was  
>>> wondering
>>> if
>>> anyone had some ball park ideas?
>>>
>>> What kind of non-end of life Cisco router model could
>>> handle domestic and international BGP tables + 3 GigE interfaces
>>> peaking at 100Mb/s or so (where the back traffic is a third of  
>>> that).
>>>
>>> Thanks
>>>
>>> Michael.
>>>
>>> _______________________________________________
>>> AusNOG mailing list
>>> AusNOG at lists.ausnog.net
>>> http://lists.ausnog.net/mailman/listinfo/ausnog
>> _______________________________________________
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>
> -- 
> Matthew Moyle-Croft Internode/Agile Peering and Core Networks
> Level 5, 162 Grenfell Street, Adelaide, SA 5000 Australia
> Email: mmc at internode.com.au    Web: http://www.on.net
> Direct: +61-8-8228-2909		     Mobile: +61-419-900-366
> Reception: +61-8-8228-2999        Fax: +61-8-8235-6909
>
> _______________________________________________
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> AusNOG at lists.ausnog.net
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-- 
Matthew Moyle-Croft Internode/Agile Peering and Core Networks
Level 5, 162 Grenfell Street, Adelaide, SA 5000 Australia
Email: mmc at internode.com.au    Web: http://www.on.net
Direct: +61-8-8228-2909		     Mobile: +61-419-900-366
Reception: +61-8-8228-2999        Fax: +61-8-8235-6909

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