Systat -ip 1 strange problem

[Mihai Tanasescu]

Well I wasn't very exact:


I have something like this:


ISP links ---> Freebsd Box -- gbit----- Cisco 3750 -- users.

If  I issue systat -ip 1 (immediately after a reboot on the Freebsd box) 
I see something like:

90.000 pkt/sec forwarded ( if I look on the C3750 interface statistics 
I  see something similar ).

If I wait 1-2-3 hours and issue systat -ip 1 I see 800-900.000 pkt/sec 
forwarded (but these stats don't correspond to what I'm seeing on the  
C3750).

If I issue systat -ip 3 then I see 90-100.000 pkt/sec which is correct.


Lowell Gilbert wrote:

>Mihai Tanasescu <mihai at duras.ro> writes:
>
>  
>
>>Don't know if this is the right list to post this problem, but I hope
>>I'm not too far off:
>>    
>>
>
>If you're not sure, then this is the right list.
>
>  
>
>>I have a Compaq Proliant ML 350 machine with 3 x fxp and 2 x em
>>network cards.
>>
>>If I issue :
>>
>>systat -ip 1 I see:
>>
>>    866056packets forwarded                0 - no checksum
>>
>>the same for systat -ip 2.
>>
>>For systat -ip 3 (and higher):
>>
>>    83537 packets forwarded                0 - no checksum   -   these
>>are the correct figures
>>
>>
>>I  really don't have the figures reported for refresh-interval = 1 or
>>2 and have just installed Freebsd 5.4 on it. (The same problem
>>manifests with Freebsd 6.0 on that box).
>>
>>A friend of mine has a similar setup (but not a Compaq box) and
>>doesn't see strange values for -ip 1 and -ip 2.
>>
>>
>>
>>Any clue on what's happening or what's causing this ?
>>    
>>
>
>I'm not quite sure what you're saying here.  Are you saying that if
>you use a refresh interval of 1, it tells you you're getting over
>800,000 packets forwarded per second, but with a longer refresh
>interval, it gives you values of around 35,000 packets per second?
>And that you know from some other method that the latter is correct?
>
>  
>