Excessive NIC errors - weird throughput

Excessive NIC errors - weird throughput

Post by way_guard.. » Wed, 11 Oct 2000 04:00:00


I have a massive problem with my network...

I'm running a linux box as router/firewall witch
SuSE Linux 7.0
my clients are Win2K connecting to samba 2.0.7

all worked fine with my old 3com EtherlinkIII
adapters and 3com hub
now I switched to 100Mbit and the problems

i use a Nexo 10/100 Mbps NWay Switch witch all
Nexo 100BaseTX NEC-100D
adapters (DEC21143 chipset)
i tried the tulip-driver half-duplex (with
explicit setting to hd in w2k)
the de4x5 driver with half and full duplex (fd
with autodetect in w2k)

routing/firewalling runs smoothly - file transfer
between my 2 w2k boxes as

and now my problem:
when uploading files to my linux-box (via samba
or ftp) i get a throughput
of 500 KByte/s
when downloading i get horrible 6.2 KByte/s!!

looking at the output of ifconfig i get this:
eth0      Link encap:Ethernet  HWaddr
          inet addr:
Bcast:  Mask:
          inet6 addr: fe80::200:1cff:feb5:de48/10
          inet6 addr: fe80::1cb5:de48/10
MTU:1500  Metric:1
          RX packets:2598 errors:0 dropped:0
overruns:0 frame:0
          TX packets:5 errors:4596 dropped:0
overruns:1 carrier:3723
          collisions:0 txqueuelen:100
          Interrupt:9 Base address:0x6100

please all you guys out where: HELP!!!



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1. Excessive NIC Errors?

I'm running Red Hat 6.2 on a 486/33 with 28Meg of RAM. I'm using two
NE2000 ISA Ethernet cards. The computer is acting as a router for my
home LAN and seems to be doing a great job of it.

Almost immediately after setting it up, though, I noticed a lot of
collisions and dropped packets. In fact, I could actually see it
occuring on on the error lights of my Ethernet switch and hub.

I'd never seem them blink before, but now, especially when I'm
downloading a big file from a very fast Internet host, my switch's
collision/error lights blink regularly.

 Link encap:Ethernet  HWaddr 00:E0:29:71:DA:A7  
 inet addr: Bcast: Mask:
 RX packets:8465167 errors:54 dropped:3331 overruns:0 frame:973
 TX packets:4463068 errors:0 dropped:0 overruns:0 carrier:0
 collisions:99849 txqueuelen:100
 Interrupt:3 Base address:0x300

 Link encap:Ethernet  HWaddr 00:E0:29:41:54:04  
 inet addr: Bcast: Mask:
 RX packets:7888036 errors:2 dropped:724 overruns:0 frame:240
 TX packets:10336604 errors:0 dropped:0 overruns:0 carrier:0
 collisions:103868 txqueuelen:100
 Interrupt:5 Base address:0x320

I have a lot of errors, but I don't know if I have so many that I should
worry about it. It doesn't not seem to cause any quality or throughput
problems for any of my other systems. I routinely max out my cable


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