Date: Thu, 9 Nov 2000 18:30:56 +0100 From: Thierry.Herbelot@alcatel.fr To: net@freebsd.org Subject: 16 NICs on a Compaq PC ? Message-ID: <C1256992.00603873.00@frmta003.netfr.alcatel.fr>
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Hello,
I'm trying to build a low-cost Ethernet router with a Compaq Deskpro
EP-6450 and 4 4-port NIC from DLINK (DFE-570-TX model)
I'm using the dc driver for a 4.1.1-Release.
the performance is very disappointing (the throughput is on the order of
200 kpbs for a direct 100Mbps ful-duplex Ethernet link)
I've got messages "dc0 : TX underrun -- increasing TX threshold" (lots of them ..)
I've also seen that all dc ports get mapped to the same irq (nr 11), and when
I try to change this setting, the machine stops booting (I have to try with WinNT)
1st Q : is there a performance hit with all ports tied to the single irq11 ? (my gut feeling
would be "of course", I'd like to be sure)
2nd Q : has someone built a similar configuration ?
3rd Q : do I need to dump all the Compaqs to buy other, more standard machines ?
TfH
PS1 :
PS2 : sinppet of the dmesg :
....
dc0: <Intel 21143 10/100BaseTX> port 0x4000-0x407f mem 0x40c00000-0x40c003ff irq
11 at device 4.0 on pci2
dc0: Ethernet address: 00:80:c8:f8:4c:4d
miibus0: <MII bus> on dc0
ukphy0: <Generic IEEE 802.3u media interface> on miibus0
ukphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
dc1: <Intel 21143 10/100BaseTX> port00x4080-0x40ff mem 0x40d00000-0x40d003ff irq
11 at device 5.0 on pci2
dc1: Ethernet address: 00:80:c8:f8:4c:4e
mii\M-bus1: <MII bus> on dc1
ukphy1: <Generic IEEE 802.3u media interface> on miibus1
ukphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
dc2: <Intel 21143 10/100BaseTX> port 0x4400-0x447f mem 0x40e00000-0x40e003ff irq
11 at device 6.0 on pci2
dc2: Ethernet address: 00:80:c8:f8:4c:4f
miibus2: <MII bus> on dc2
ukphy2: <Generic IEEE 802.3u media interface> on miibus2
ukphy2: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
dc3: <Intel 21143 10/100BaseTX> port 0x4480-0x44ff mem 0x40f00000-0x40f003ff irq
....
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