[c-nsp] Router recommendation for small ISP

[Mounir Mohamed]

>From a different angle, IPv4 depletion will defuse the increasing of IPv4
routes on the internet.

On Thu, Feb 17, 2011 at 11:30 AM, Nick Hilliard <nick at foobar.org> wrote:

> On 17/02/2011 09:11, Mounir Mohamed wrote:
>
>> It depends on the number of BGP sessions you gone use, multiple BGP
>> sessions
>> with full internet routing table (340K right now) will be stored smoothly
>> on
>> an RP with 4G or 8G memory, but after completing the BGP decision process
>> it
>> will end up with less than 500k on the forwarding path (ESP5 with 500k
>> limit), so till now no problem,  but if you are planning to use a
>> multipath
>> option (rare in ISP) you may have a problem.
>>
>
> A hard 500k prefix limit means that the hardware has an effective useful
> lifetime in the DFZ of maybe 2 years at a maximum.  If your depreciation
> period is > 2 years, you need to consider getting a device with more tcam
> than this.  The larger asr1ks fit the bill in this regard.
>
> Nick
>
>


-- 
Best Regards,
Mounir Mohamed, CCIE No.19573 (R&S, SP)
Senior Network Engineer, Core Team.
NOOR Data Networks, SAE
Mobile# +2-010-2345-956
http://mounirmohamed.wordpress.com
http://www.linkedin.com/in/mounirmohamed