As Jason states, make sure you are not using auto-negotiation at all. Hard set the speed and duplex settings both in the switch and the NIC.
Another item to try is setting both the switch port and the NIC to 100 Half Duplex. There are serious flow control issues with 100 MB FD Ethernet (actually it has to do with lack of consistent flow control caused by each vendor using slightly different implementations of FD flow control).
--Moby
Jason Dixon wrote:
On Thu, 2003-10-16 at 19:56, Jeff wrote:
Peeps,
Any ideas what would cause a slow ethernet connection? My LAN is running @ 100M full duplex but when i'm tranfering files via FTP/SCP/SMB it runs dog slow - around 30k/sec.
I have checked the stats on both ethernet devices and the switch - no CRC errors etc. No firewalls in the middle, the only thing between both boxes is a switch. Ive already tried swapping ports, cables etc. everything's being picked up as 100M Full duplex.
If you haven't already, try forcing all interfaces to full-duplex (100baseTx-FD using mii-tool). Autonegotiation routinely causes problems with NICs/switches/etc. FWIW, most folks familiar with anything Realtek will tell you they suck.
-- --Moby
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