Date: Sun, 29 Nov 2009 16:36:54 -0800 From: Pyun YongHyeon <pyunyh@gmail.com> To: Brett Glass <brett@lariat.net> Cc: usb@freebsd.org Subject: Re: ASIX USB-to-Ethernet drivers Message-ID: <20091130003654.GB1123@michelle.cdnetworks.com> In-Reply-To: <200911300004.RAA15867@lariat.net> References: <200911282040.NAA05930@lariat.net> <20091129212335.GA1128@michelle.cdnetworks.com> <200911300004.RAA15867@lariat.net>
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On Sun, Nov 29, 2009 at 05:03:44PM -0700, Brett Glass wrote: > At 02:23 PM 11/29/2009, Pyun YongHyeon wrote: > > >I think the large number of interrupts has nothing to do with > >axe(4). Almost all USB ethernet controllers are poorly designed > >to save cost so you can't expect reasonable performance from it and > >you should have fast CPU to copy received frames in a buffer. > >It's worse than rl(4) controllers. > > Are there any that are better? I have several machines here that I will > be using as embedded systems. They have one Ethernet interface each, > and I need some of them to have two. The only other non-USB ports > on these machines are video and CompactFlash. > If you had redundant mini PCI/PCIe slot I would have recommended to avoid USB based ethernet controllers. > I've thought about using VLAN tagging and VLAN switch to double up > the Ethernet port, but this is quite expensive. So, I need the best USB > Ethernet I can get. > > I chose the AX88772A because it seems to be a better solution than the > Davicom DM9601 (which is USB 1.0 only). The AX88178 has more buffer > space, but I am having trouble finding reasonably priced adapters that > use it. > > --Brett Glass >
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