FBSD 1GBit router?

[Ingo Flaschberger]

Dear Bareney,

>> And back to 1x is not fast enough:
>> There are no 1gbit single port network cards that
>> support more than 1
>> lane, even if you plug it into a 16 lane slot.
>> (and I'm not talking about 10gbit cards; if you have
>> 10gbit upstream you
>> have enough $$ to buy good gear)
>
> Ok, well I've never seen a router with 1 port.  I
> thought we were talking about building a router?

Have you ever read the link?
Have you noticed that the axiomtek appliance has 7 gigabit ports?
Each one connected with 1 lane pci-e?

> The lack of PCIe cards is a good reason to consider a
> PCIX machine. On the systems that we have, the 1x PCIe
> ports are a lot slower than a PCI-X card in the slot.

Perhaps, but: pci-x: 4gbit for the whole bus system.
pci-e: 2gbit/lane

> You need 4Gb/s of throughput to handle a gigablt
> router. (1 GB/s full duplex times 2).  1x is 4Gb/s
> maximum. In my view, you always need twice the
> bandwidth on the bus to avoid contention issues.

sample1:
3 pci-cards:
card 1: 1x = 2gbit (dedicated)
card 2: 1x = 2gbit (dedicated)
card 3: 1x = 2gbit (dedicated)
--------------------
sum:         6gbit
(but the use only 3)

sample2:
2 pci-x cards
card 1: 4gbit (shared)
card 2: 4gbit (shared)
card 3: 4gbit (shared)
---------------------
sum:    4gbit

homework:
calculate with 7 ports.

Kind regards,
 	Ingo Flaschberger