[AusNOG] back of envelope sizing calculations

[Skeeve Stevens]

Also, you probably mean extra FE (0/2)


G1:
interface GigabitEthernet0/1
interface GigabitEthernet0/2
interface GigabitEthernet0/3

G2:
interface GigabitEthernet0/1
interface FastEthernet0/2
interface GigabitEthernet0/2
interface GigabitEthernet0/3

Which you will note is inserted between the 1st and 2nd GigE for some drug induced reason.

...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 3:26 PM
To: ausnog at ausnog.net
Subject: Re: [AusNOG] back of envelope sizing calculations

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

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Skeeve Stevens, CEO/Technical Director
eintellego Pty Ltd - The Networking Specialists
skeeve at eintellego.net<mailto:skeeve at eintellego.net> / www.eintellego.net<http://www.eintellego.net>
Phone: 1300 753 383, Fax: (+612) 8572 9954
Cell +61 (0)414 753 383 / skype://skeeve
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Disclaimer: Limits of Liability and Disclaimer: This message is for the named person's use only. It may contain sensitive and private proprietary or legally privileged information. You must not, directly or indirectly, use, disclose, distribute, print, or copy any part of this message if you are not the intended recipient. eintellego Pty Ltd and each legal entity in the Tefilah Pty Ltd group of companies reserve the right to monitor all e-mail communications through its networks.  Any views expressed in this message are those of the individual sender, except where the message states otherwise and the sender is authorised to state them to be the views of any such entity. Any reference to costs, fee quotations, contractual transactions and variations to contract terms is subject to separate confirmation in writing signed by an authorised representative of eintellego. Whilst all efforts are made to safeguard inbound and outbound e-mails, we cannot guarantee that attachments are virus-free or compatible with your systems and do not accept any liability in respect of viruses or computer problems experienced.



-----Original Message-----
From: ausnog-bounces at lists.ausnog.net<mailto:ausnog-bounces at lists.ausnog.net> [mailto:ausnog-
bounces at lists.ausnog.net<mailto:bounces at lists.ausnog.net>] On Behalf Of Michael Bethune
Sent: Thursday, 5 March 2009 1:17 PM
To: ausnog at ausnog.net<mailto: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.

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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<mailto:mmc at internode.com.au>    Web: http://www.on.net<http://www.on.net/>
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