Linux Router: TCP slow, UDP fast
fw at deneb.enyo.de
Sat Feb 14 12:55:02 UTC 2009
> I'm losing the will to live with this networking headache ! Please feel free
> to point me at a Linux list if NANOG isn't suitable. I'm at a loss where
> else to ask.
The linux-net might be more appropriate indeed.
> With and without shaping and over different bandwidth providers using the
> e1000 driver for an Intel PRO/1000 MT Dual Port Gbps NIC (82546EB) I can
> replicate full, expected throughput with UDP but consistently only get
> 300kbps - 600kbps throughput _per connection_ for outbound TCP
I've seen this behavior as the result of duplex mismatches.
(The tcp settings are end system matters and do not affect how the
router forwards traffic.)
More information about the NANOG