[c-nsp] 6500 Sup2 memory needs

[Church, Chuck]

So does number of prefixes affect sup memory that much?  We're only
carrying around 800 routes (one per site).  If that even went up 10x
over the next couple years, that still not much.  Our Internet-facing
devices are 720-3B, since they do have a full table.  With 300 6500s to
touch, obviously the difference between 256 and 512 is pretty
substantial, price-wise.

Thanks,

Chuck

-----Original Message-----
From: Kevin Graham [mailto:mahargk at gmail.com] 
Sent: Tuesday, November 07, 2006 1:09 PM
To: Church, Chuck
Cc: cisco-nsp at puck.nether.net; Clinton Work
Subject: Re: [c-nsp] 6500 Sup2 memory needs

On 11/7/06, Clinton Work <clinton at scripty.com> wrote:

> I'm not sure how 12.2SX will change the memory requirements.  We
couldn't
> get away with just 128MB on the Sup2s.

Comparing Sup2/2's (512mb/512mb) running similar feature sets, 12.1E
PK2SV and 12.2SXF IPSERVICESK9_WAN, both sup and msfc memory
utilization is about 40mb higher under SXF.

With ~210k prefixes in the CEF table, that leaves the sup with about
270mb free. If you're at 128mb now and have to upgrade anyways,
certainly go with 512mb. The failure mode is far too ugly to justify
cutting corners.

Make sure you don't ignore your OSM's and FlexWAN's either. Legacy
FlexWAN originally shipped with 64mb per processor which you're lucky
if you haven't exhausted already, even under 12.1E.