[vortex] What do RX-FIFO errors mean?

Ben Greear greearb@candelatech.com
Sun, 26 Aug 2001 21:47:25 -0700

Ben Greear wrote:
> I have a program that reads off of a raw PACKET socket on my laptop.
> I'm using a 3com 575BT CardBus NIC.  I put the NIC in PROMISC mode and
> am using it kind of like a user-space bridge..
> As I start running higher rates (1.54Mbps) I start getting RX-FIFO errors.
> The question is, what causes RX-FIFO errors, and what can I do
> to make them go away?  It must have something to do with my program,
> as I don't see the problem when I have it configured in certain
> ways.  I also do not see the problem on my built-in RTL8139 NIC.
> However, I'm at a loss as to what the exact difference is.

Further debugging of my code revealed that if I removed the
IP address from the interface (ip == then the problem
mostly goes away.  However, I would still like to know what kind
of things cause the RX-FIFO, as I could just be masking a real


Ben Greear <greearb@candelatech.com>          <Ben_Greear@excite.com>
President of Candela Technologies Inc      http://www.candelatech.com
ScryMUD:  http://scry.wanfear.com     http://scry.wanfear.com/~greear