bogus packets and arp floods.

bogus packets and arp floods.

Post by Brad Killebr » Tue, 01 Oct 1996 04:00:00

Problem #1:

This past Friday I upgraded to Slackware 3.1 and kernel 2.0.21.
I'm now getting a bunch of "bogus packet" messages in syslog.
I read in ./linux/Documentation/networking/Configurable about how
8-bit ethernet cards don't like large windows, so I recompiled
the kernel without that feature and also set the window size on
eth0 to 4096.

Does anyone else have the same problem?  Is there a fix for this?
I didn't have this problem with Slackware 2.3 running 1.2.13.

Problem #2:

I'd like to take advantage of IP Aliases but I'm having a
problem with that as well.  The primary device eth0 uses IP  When I configure the alias device eth0:0 with,
the machine begins to broadcast arp "who-has" packets -- big time.
I'm on a non-subnetted Class B so we're talking about ALOT of traffic.
I follow the instructions included with the kernel; I'm not doing
any odd configurations.

Does this problem stem from the fact that eth0:0 is being
configured with a Class A address?

Any help would be appreciated.


The Admin's prayer: "Our OS who art in CPU, UNIX be thy name.
  Thy programs run, thy syscalls done, in kernel as it is in version."


1. Dropped packets, bogus packets and errors with SMC Elite 16 Plus


All my systems are using the SMC Elite 16 Plus as network board, since I'm
using samba (which means more load) I got packet errors.

When I do a file copy from an win95 machine to the linux box running samba,
I got approx 1 bogus packet in 5 minutes and the dropped packets and errors
count is also slowly increasing.

I tried this for 3 machines running linux, they all have the same problem.
Novell Netware has no problems with the SMC Elite 16 Plus.
I also checked the wiring, seems to be ok..

eth0      Link encap:10Mbps Ethernet  HWaddr 00:00:C0:F5:7D:62
          inet addr:  Bcast:  Mask:
          RX packets:98 errors:3 dropped:155 overruns:0
          TX packets:96 errors:0 dropped:0 overruns:0
          Interrupt:10 Base address:0x250 Memory:d0000-d4000

eth0: WD80x3 at 0x240,  00 00 C0 F5 7D 62 WD8013, IRQ 10,
shared memory at 0xd0000-0xd3fff.

Chipset 8013 EPC

Bogus error messages:
eth0: bogus packet: status=0x0 nxpg=0x2e size=1518
eth0: bogus packet: status=0x0 nxpg=0x19 size=1518

Kernels tried: 20.0.28/30/31

The system does not crash and the network speed is ok.

Thanks in advance,

Gerhard Ahuis          JO32EO               It's good to be independent

Unsolicited advertisements subject to $1000 consulting fee.

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