Excessive Ethenet Collisions: v.091/2.0.36/21143

[MJ Watson]

Sorry to have delayed answering, this got pushed to the back burner for a while.

The netmasks match what our Alpha servers are running without apparent problems.  In
addition, I've been able to substantially reduce the number of collisions by no longer
running Netscape on an Alpha server and utilizing my Linux system as the X11 display
server (if I've got my X11 terminology right).  Stalled downloads from web sites was
the primary cause of the collisions, for some reason.  Utilizing Netscape "in house"
has apparently cured it.

If there are problems with the netmask/broadcast settings, our network folks are not
aware of them.  And, these have been mandated by those in the enterprise network office.

Thanks for your assistance,
Michael

> check your network settings for the ethernet devices, to repeat: The netmask for the loopback address is wrong. The broadcast for eth0 is wrong, the netmask for
> eth0 may be wrong. Those can also cause excessive collisions.
> 
> > > > lo        Link encap:Local Loopback
> > > >           inet addr:127.0.0.1  Bcast:127.255.255.255  Mask:255.255.240.0
> > > >           UP BROADCAST LOOPBACK RUNNING  MTU:3584  Metric:1
> > > >           RX packets:195 errors:0 dropped:0 overruns:0 frame:0
> > > >           TX packets:195 errors:0 dropped:0 overruns:0 carrier:0
> > > >           Collisions:0
> > >
> > > This does seems strange... The loopback should show up as:
> > >
> > >  inet addr:127.0.0.1  Bcast:127.255.255.255  Mask:255.0.0.0
> > >
> > >
> > > >
> > > > eth0      Link encap:Ethernet  HWaddr 00:00:F8:78:D2:8A
> > > >           inet addr:10.40.42.209  Bcast:255.255.255.0  Mask:255.255.240.0
> > > >           UP BROADCAST RUNNING PROMISC MULTICAST  MTU:1500  Metric:1
> > > >           RX packets:15826553 errors:0 dropped:0 overruns:0 frame:0
> > > >           TX packets:1789720 errors:0 dropped:0 overruns:0 carrier:0
> > > >           Collisions:1152924
> > > >           Interrupt:9 Base address:0xec00
> > > >
> > >
> > > This is not right.
> > >
> > > check again the broadcast settings for eth0.. What you have does NOT seem
> > > right.... AT MOST (default for class A 10.x.y.z net) it should be 10.255.255.255 with a mask of
> > > 255.0.0.0, but since it is subnetted, check with your network dudes/duddettes  what the correct mask and broadcast should be for your segment.
> > >
> 
> --
> -
> Sami Yousif
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> 
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> 
> 


==

===================================================
Michael Watson           Unix Systems Administrator
U.S. Coast Guard Aircraft Repair and Support Center
CGAS Elizabeth City, NC                252.334.5269
n6wav@yahoo.com                mjwatson@livenet.net
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