RE: Pentium IV router vs. Cisco router
>How many cable modems can your 'CMTS' deal with?
>How many do you want to have in a years time?
It's a Motorola BSR 1000 (2000 Cable Modems as far as I know) but we will
need another one for a total of 5000 Cable Modems in 18 months.
>The border router is currently running linux? (the stats you provided)?
>If so, you may want to look at the output from vmstat , and look at
>'cpu sys' and interrupts.
Yes, the border router run GNU/Linux Debian with kernel 2.6. I will try
vmstat.
>Are you using any QoS features? or are you just routing the traffic?
>Is your border router running static routes? or are you using bgp?
Yes, I will run QoS (mark packets with iptables??) and run bgp in the near
feature, also we are just routing the traffic.
Thanks to all of you for yours answers.
Saludos. Pablo.
-----Mensaje original-----
De: Andrew Miehs [mailto:andrew@2sheds.de]
Enviado el: Domingo, 26 de Febrero de 2006 05:23 p.m.
Para: Pablo
CC: debian-isp@lists.debian.org
Asunto: Re: Pentium IV router vs. Cisco router
On Feb 25, 2006, at 12:15 AM, Pablo wrote:
> I have 300 CMs, (Cable Modems) average pack: 512kbps
> each one, behind a border router (CMs->CMTS->border router) with
> this CPU:
I take it that you only have one cable modem concentrator on your end...
How many cable modems can your 'CMTS' deal with?
How many do you want to have in a years time?
The border router is currently running linux? (the stats you provided)?
If so, you may want to look at the output from vmstat , and look at
'cpu sys' and interrupts.
Are you using any QoS features? or are you just routing the traffic?
Is your border router running static routes? or are you using bgp?
Can you see if packets are being dropped? I am not 100% sure that
netstat -i
really shows correct statistics...
But the big question is, what should this whole setup look like in 12
months,
and does it make sense to invest in expensive cisco hardware.
Don't forget - if you do go for cisco, you will need to have a spare
of every
card, and chasis, so you will probably need two chasis, 3 or four
interface cards...
Just a few thoughts...
Andrew
PS: I prefer using real routers, as they can switch packets in their
hardware...
You may even want to look at a 26xx as that should probably be fast
enough if you
only want 2 ethernets, and are doing fast switching....
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