[c-nsp] DHCP & NAT router limitations

[Ge Moua]

Those Cisco ISR-G1 mostly punt NAT (& DHCP) functionality to CPU as such 
you may have scalability issues for the NATs for CPU resource usage.  
I've seen ASA5550 do >65k NAT connections with minimal CPU load (I'm 
sure the lower ASA models can achieve similar results depending on how 
much memory on board).

I'd concur that throughput of ~ 100Mbps without NAT can be easily done 
by these ISR-G1 models.

--
Regards,
Ge Moua

Univ of Minn Alumnus
--


On 05/31/2012 06:39 AM, Rens 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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