[c-nsp] DHCP & NAT router limitations

[Richard Clayton]

I know that with Packet Marking, NAT and Firewall enabled with 512byte
frames you will get 50Mbps (symmetric) throughput out of a 2921 (cpu
running at 75%)

If this were a router to provide Internet to end users then you would have
more traffic dowload than upload and with 50Mb download and say an upload
of around 25% of that then the cpu would probably tick over at around 40%.
If you don't need Firewall and Marking then a lower model router would do,
I reckon a 1921, not sure of the G1's only tested G2's

Thanks
Rick




On 31 May 2012 12:39, Rens <rens at autempspourmoi.be> wrote:

> Where do you get that info that a 1841 & 2811 can't do this?
>
> They do fine average Internet traffic @ 50Mbps
>
> I got 2811's doing 100Mbps
>
>
>
> Indeed my wifi setup can cope with 2K connections
>
>
>
> From: aled.w.morris at googlemail.com [mailto:aled.w.morris at googlemail.com]
> On
> Behalf Of Aled Morris
> Sent: woensdag 30 mei 2012 17:09
> To: Rens
> Cc: cisco-nsp at puck.nether.net
> Subject: Re: [c-nsp] DHCP & NAT router limitations
>
>
>
> On 30 May 2012 11:17, Rens <rens at autempspourmoi.be> wrote:
>
> For a one day wifi event I'm looking which kind of router can be used to
> deliver DHCP & NAT for 1000-2000 simultaneous users
>
> Total WAN capacity will be +- 50Mbps
>
> Would a 1841 or a 2811 be able to handle all this NAT/DHCP?
>
>
> Neither of these would cope with 50Mbps even without the NAT.
>
> If you are purely Ethernet then the cheapest Cisco solution would be an
> ASA5505
>
> I assume you've already got a wifi setup that can cope with 2,000
> connections.
>
> Aled
>
>
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