[c-nsp] need good recommendation for isp gateway nat bgp pbr

[Brian Roche]

Nick,

Thanks for the advice.  I understand the model is limited but it looks
like it is geared towards a network of our size.  We're just accepting
default from the upstream providers so not too worried about the size
of the routing table.  Mostly concerned if there are NAT/PBR/BGP
limitations.

Thanks again,
Brian

On Thu, May 26, 2011 at 11:04 AM, Nick Hilliard <nick at foobar.org> wrote:
> On 26/05/2011 14:47, Brian Roche wrote:
>>
>> ASR1001 base with 4 gigE ports.  Getting a quote on the ASR1001 b/c it
>
> Don't expect an ASR1001 to be able to handle a full routing table within the
> next two years.  They have enough space on the ESP to handle only 500k ipv4
> prefixes (or 125k ipv6), and it is highly likely that with the expected
> growth of ipv6, that this memory will be exceeded before too long.  Bear in
> mind that on these boxes, a single ipv6 prefix takes up as much lookup
> memory as four ipv4 addresses.
>
> If you need to do full routing and want to do it on the ASR1k (which is a
> really nice platform, btw), then you should look at an ASR1002 + ESP10 or
> larger (which will handle 1.7M ipv4 / 500k ipv6 prefixes).
>
> Otherwise yeah - the ASR1k platform is a huge improvement on the 7300 /
> NPE-G2 line.
>
> Nick
>
>