[c-nsp] Sampled netflow on 6500/7600

[Matt Stockdale]

Hmm, I'm seeing a non-trival tcam load on even less traffic, but I have
a non 3bxl 720

Summary of Netflow CAM Utilization (as a percentage)
====================================================
TCAM Utilization             :   26% 
ICAM Utilization             :   0% 

Of course, I'm doing v5 peer-as export, but it's only on a few hundred
Mbps of traffic. (edge router)

I guess that's not very helpful, but maybe it can confirm your suspicion
that you'll need to move to sampled netflow. 

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Richard A
Steenbergen
Sent: Friday, June 30, 2006 6:39 PM
To: Bill Nash
Cc: cisco-nsp at puck.nether.net
Subject: Re: [c-nsp] Sampled netflow on 6500/7600

On Fri, Jun 30, 2006 at 06:24:03PM -0400, Bill Nash wrote:
> 
> I'm not going to even pretend to have your level of expertise here, 
> but I'm only seeing one or two percent tcam utilization on a 
> moderately loaded 6509. I suppose it's also possible that even though 
> I'm configured in such a manner that I'm still pulling 15 to 16 gigs 
> of raw flows out of my network on a daily basis, I'm still doing it
wrong.

Well just to clarify, by moderate load I mean something like:

     Forwarding engine load:
                     Module       pps   peak-pps
peak-time
                     5        1489010    2542352  13:05:48 EDT Sun May
21 2006

show fabric utilization all:
 slot    channel      speed    Ingress %     Egress %
    1          0        20G           17            6
    1          1        20G           15           12
    4          0        20G            5           10
    4          1        20G            8           16
    5          0        20G            0            0

Aka nowhere close to "large volumes of traffic", but not completely
empty, just a typical aggregation box pushing typical internet traffic.

Summary of Netflow CAM Utilization (as a percentage)
====================================================
TCAM Utilization             :   72% 
ICAM Utilization             :   0% 

Destination flowmask only, v4 sampling only, v5 export, etc.

-- 
Richard A Steenbergen <ras at e-gerbil.net>
http://www.e-gerbil.net/ras
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