Guys,

This is a new one on me. I have been using the onboard LAN (RTL-8139/8139C/8139C+ (rev 10)) for several years and always got great transfer rates:

01:0b.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10)
        Subsystem: Giga-byte Technology GA-7VM400M/7VT600 Motherboard
        Flags: bus master, medium devsel, latency 32, IRQ 16
        I/O ports at 8000 [size=256]
        Memory at e8000000 (32-bit, non-prefetchable) [size=256]
        Capabilities: [50] Power Management version 2
        Kernel driver in use: 8139too
        Kernel modules: 8139too, 8139cp

10:02 providence:~/arch/pkg/new-110718/virtualbox_bin> rsync -uav --progress virtualbox_bin-4.0.12-1-i686.pkg.tar.xz phoenix:/srv/http/dl/arch/i686
sending incremental file list
virtualbox_bin-4.0.12-1-i686.pkg.tar.xz
    55685508 100%   11.59MB/s    0:00:04 (xfer#1, to-check=0/1)

sent 55692427 bytes  received 31 bytes  10125901.45 bytes/sec
total size is 55685508  speedup is 1.00

I was having intermittent lockups during large file transfers (memtest is fine), so I thought I would change the NIC. I installed a 3Com Corporation 3c595 100BaseTX [Vortex] card and tested the throughput. The throughput is 1/3 what I was getting with the Realtek card.

I searched the forums and I've tried ethtool in setting speed, duplex and autoneg, but it makes no difference. i.e.:

ethtool -s eth0 speed 100 duplex full autoneg off

What else can I try to get this card working correctly? All light indications on the card and the switch it is connected to show a 100TX connection is being made. What say the gurus?

--
David C. Rankin, J.D.,P.E.

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