Hi Oliver,

counters make sense: you were downloading something - looks like a TCP strem -
and the set of TCP ACKs has been intercepted, for a total of  soma 16MB. Doing
a few maths confirms this in fact packets are very small: 16732160 / 273408 =
~61 bytes.

Now, the configuration posted previously looks correct. Check on your sFlow
agent what is being sampled - which interfaces and which direction - and make
sure that everything you need to capture the whole stream is there. Often the
traffic is sampled only uni-directionally.

Once that's verified, if nothing comes up i would then suggest to debug the
sFlow datagrams with sflowtool. That would rule out either the agent or the
collector. Maybe it's also a good idea to specify vendor and model of the
sFlow agent, maybe people reading might have useful tips.

Cheers,
Paolo

On Thu, Sep 20, 2007 at 06:31:56PM +0200, Oliver Treck (Treck.de - the WEB 
energyzer) wrote:
> Hi Paolo.
> 
> Thanks for your fast response.
> Yes, i'm using sFlow.
> 
> It seems, that the additional configuration did not realy work.
> Counters for packets and bytes are increased now, but they are still absurd.
> 
> I did a download of 600MB but the counters telling:
> 
> +----------+----------+---------+---------+------+--------+--------+-------------+---------+----------+----------+-----------+----------+-----+---------+----------+-------+---------------------+---------------------+
> | agent_id | class_id | mac_src | mac_dst | vlan | as_src | as_dst | ip_src 
> | ip_dst  | src_port | dst_port | tcp_flags | ip_proto | tos | packets | 
> bytes    | flows | stamp_inserted      | stamp_updated       |
> +----------+----------+---------+---------+------+--------+--------+-------------+---------+----------+----------+-----------+----------+-----+---------+----------+-------+---------------------+---------------------+
> |        0 |          |         |         |    0 |      0 |      0 | 
> xx.xx.x.xxx | 0.0.0.0 |        0 |        0 |         0 |          |   0 |  
> 273408 | 16732160 |     0 | 2007-09-20 17:00:00 | 2007-09-20 17:54:23 |
> +----------+----------+---------+---------+------+--------+--------+-------------+---------+----------+----------+-----------+----------+-----+---------+----------+-------+---------------------+---------------------+
> 
> That's just 16MB :(
> 
> Another Problem is, that the daemon seems to collect traffic just for 
> outgoing packets.
> Since one week there was no entry like ip_src = 0.0.0.0 -> ip_dst = <OUR IP>
> just: ip_src = <OUR IP> -> ip_dst = 0.0.0.0
> 
> But before there already were some of incoming packets.
> 
> Even as long as i know that the byte counters are wrong i cannot even 
> say, if the outgoing and incoming traffic is summarized here in that 
> single entry "ip_src = <OUR IP> to ip_dst 0.0.0.0" or if it's completely 
> left out.
> 
> Another problem is also, that some ip's seem not to be accounted 
> continuous. For an ip with high traffic load the last entry was 
> yesterday at 6pm.
> 
> Do you have another idea for my problems?
> 
> Best regards,
> Oliver Treck

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