Port-forwarding + collisions

Port-forwarding + collisions

[Rudi Starcevic]

Hi,

I'm still working on why I have poor performance and have found some 
data I need to check as I'm not that familiar.

Below I have the output from ifconfig.
eth0 is my Internet NIC with eth1 my internal 192.168.0.x network.

On my eth0 NIC we can see there is 0 collisions

On eth1 we can see collisions:6810362

This must mean a problem on the 192 end.

These are colo servers which are configured by techs over there so I 
don't have physical access to these machines ...

What could cause such a problem I wonder ?

It seems highly likely that this may be the cause of my bandwidth problems.

It is quite surprising that there is problems as there is only two machines.
--------------------------------------
Windnows 192.x.x.x = Gigabit card
|
Gigabit Switch
|
Linux 192.x.x.x = 10/100 MB card
Linux 64.x.x.x = 10/100 MB card
--------------------------------------

Is there anything special I need to do on the Linux end ?
I am told it is all supposed to auto detect ..

eth0      Link encap:Ethernet  HWaddr xx:xx:xx
          inet addr:66.xxx.xx.79  Bcast:64.255.255.255  Mask:255.255.255.192
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:93820046 errors:0 dropped:0 overruns:0 frame:0
          TX packets:112683401 errors:0 dropped:0 overruns:1 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:375314364 (357.9 MiB)  TX bytes:2449306437 (2.2 GiB)
          Interrupt:10 Base address:0x1000 Memory:40000000-40000038

eth0:0    Link encap:Ethernet  HWaddr xx:xx:xx
          inet addr:66.xxx.xx.100  Bcast:64.255.255.255  
Mask:255.255.255.192
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          Interrupt:10 Base address:0x1000 Memory:40000000-40000038

eth1      Link encap:Ethernet  HWaddr xx:xx:xx
          inet addr:192.168.0.1  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:110547112 errors:0 dropped:0 overruns:0 frame:0
          TX packets:85362007 errors:85 dropped:0 overruns:0 carrier:85
          collisions:6810362 txqueuelen:1000


Thanks


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Re: Port-forwarding + collisions

[Jason Opperisano]

On Thu, 2005-02-24 at 22:48, Rudi Starcevic wrote:
> Hi,
> 
> I'm still working on why I have poor performance and have found some 
> data I need to check as I'm not that familiar.
> 
> Below I have the output from ifconfig.
> eth0 is my Internet NIC with eth1 my internal 192.168.0.x network.
> 
> On my eth0 NIC we can see there is 0 collisions
> 
> On eth1 we can see collisions:6810362

i would go out on a limb and say that's your problem.  how's about
tcpdumping eth1 on the linux machine and see what's really going on on
the wire?

i would also point back to the possibility that the internal switch is
horribly misconfigured.

-j

--
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 the light bulb."
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