FBSD 1GBit router?

Ingo Flaschberger if at xip.at
Tue Feb 26 00:43:20 UTC 2008

Dear Kevin,

>>>> I upgrade to 7.0RC3 but still the same. 418Mbit is the roof.
>> older fbsd's are faster than newer.
>> How are the nic's connected to the cpu?
>> lspci -v
> V7 is not (in my experience) slower than V4, v5, or v6.

v6 is at least slower than v4.
(look at the table at the end)

> I have run a lot
> of tests at speeds MUCH higher than 1Gb. With 10Gb cards, I can sustain
> transfer rates of over 9Gbps (assuming low RTT and suitable
> hardware). 1Gbps is not even a challenge...even over a 100 ms. RTT.

You can route 9Gbps - or only source or sink 9gbps?
What packet size?
Whats the maximum pps (with 64byte packets)? (Thats the real interesting 
value, not mbps)

I have a 1.2Ghz Pentium-M appliance, with 4x 32bit, 33MHz pci intel e1000 
With maximum tuning I can "route" ~400mbps with big packets and ~80mbps 
with 64byte packets.
around 100kpps, whats not bad for a pci architecture.

To reach higher bandwiths, better busses are needed.
pci-express cards are currently the best choice.
one dedicated pci-express lane (1.25gbps) has more bandwith than a whole 
32bit, 33mhz pci-bus.

> Note that high throughput may require some tuning. Transmit and receive
> windows need to be rather large if the RTT is very long at all. (See
> "bandwidth-delay product" in Stevens or some other TCP reference.)

I'm not shure if he's using the nic for a server or for a router?

Kind regards,
 	Ingo Flaschberger

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