a very strange netstat output and problem when using transparent proxy

[Marat N.Afanasyev]

Oliver Fromme wrote:
> Marat N.Afanasyev wrote:
>  > bge0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> 
> Ok, I also have a machine with bge(4) NIC within reach.
> I've had a look at it for similar symptoms (see below).
> 
>  > bge0   1500 <Link#1>      00:50:45:5f:4f:78  2341018   799  3062828 
>  > 0     0
> 
> 799 is not good, but I wouldn't call it "huge amount of
> ierrs".  Is that a typical number, or was that output
> taken before the problem (network freeze) appears?

more typical is the following:

% netstat -I bge0 -w 60
             input         (bge0)           output
    packets  errs      bytes    packets  errs      bytes colls
     151993   241  111011660     172436     0  120848541     0
     169867   388  118858096     192997     0  135783627     0
     130524   407   91213775     145884     0  110857756     0
     327168  1637  214730921     397193     0  275486626     0
     385627  1027  254274520     471177     0  333456526     0
     300184   720  198432049     367100     0  271325679     0
     261095  5525  166910652     324112     0  251708900     0
     278257 11998  176453071     349975     0  268865328     0
     314383  8617  203347024     393589     0  301819857     0
     195408 11647  129989509     246718     0  195720356     0
       7163 23787    6087244      13165     0    7694485     0
       2485 24786    1743165       6571     0    4015170     0
       2202 26175    1117627       6225     0    3992217     0

and oops. none of two interfaces can any more process any incoming 
packet. ping drops increase to 99%

> 
>  > % uptime
>  >   7:34PM  up 40 mins, 3 users, load averages: 0.14, 0.16, 0.08
> 
> Ok, 799 ierrs after 40 minuted uptime is definitely not
> good.  :-)
> 
>  > Real IP address. I've already switched forward off and make squid listen 
>  > on 80 instead. Problem persists.
> 
> OK, so it's a NIC problem, not IPFW-related.
> 
> Here's output from my machine with bge(4) NIC:
> 
> Name  Mtu Network   Address         Ipkts Ierrs    Opkts Oerrs  Coll
> bge0 1500 <Link#1>  00:16:35:...  7808595    35  3451475     0     0
> 
> Uptime is 8 days, the machine is only moderately loaded,
> but gets quite some amount of NFS traffic (as a client).
> OS is FreeBSD 6.2-PRELELEASE as of October 19th.

as I said before, this problem persists on all my machines with 5704.

> Whie 35 ierrs in 8 days isn't much, I think it still
> indicates a problem somewhere.  It should really be 0.
> (I haven't experienced any freezes or other problems,
> though.)
> 
> Maybe you should ask on the -stable mailing list for
> others with bge(4) NICs to check.  It looks like a bug
> in the driver.
> 
> Oh by the way, do you have polling enabled?  Try to
> switch in on (if disabled) or off (if enabled) and check
> whether it improves the situation for you.
> 
> Best regards
>    Oliver
> 
polling cannot be "safely" turned on smp, without eating a lot of cpu to 
interrupt processing. So, I run away from polling.

-- 
SY, Marat