Le Tue, 22 Feb 2011 18:09:32 +0100, Patrick Lamaiziere <patf...@davenulle.org> a icrit :
> (4.8/amd64) > > Hello, > > I'm using two ethernet cards Intel 1000/PRO quad ports (gigabit) on a > firewall (one fiber and one copper). > > The problem is that we don't get more than ~320 Mbits/s of bandwith > beetween the internal networks and internet (gigabit). > > As far I can see, on load there is a number of "Ierr" on the interface > connected to Internet (between 1% to 5%). > > Also the interrupt rate on this card is around ~7500 (using systat). > In the em(4) driver, there is a limitation of the interrupt rate at > 8000/s. ... Well, I've made some tests and increasing the number of interrupts or the number of RX descriptors does not help to reduce the Ierr count or to increase the bandwith. So I don't know where is the problem... Do you think the hardware used is not powerful enough ? (dmesg : http://user.lamaiziere.net/patrick/dmesg-openbsd4.8.txt). The box is a router/firewall, there are 6 interfaces on the box, one is connected to internet (the most busy interface). One is connected to the lan (very busy too). The others are far less busy. To give an idea, this box replaces an old Cisco 7204 which hangs at 200 Mbits, no more. I would be happy to know which kind of hardware you are using to build a gigabit router with good performance? Thanks to all. regards.
