Date: Thu, 20 Nov 1997 10:32:10 +0100 (MET) From: Emmanuel Duros <Emmanuel.Duros@sophia.inria.fr> To: freebsd-hackers@freebsd.org Subject: My fbsd router looses packets ! Message-ID: <199711200932.KAA07538@chouette.inria.fr>
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My fbsd (2.2.2 release) router has two communication interfaces and when
it routes packets between its interfaces, it looses lots of packets !
Here is the network configuration:
--- --------- ---
|A| | B | |C|
--- --------- ---
| (b1) | | (b2) |
-------------------------- --------------------------
b1 is an Ethernet interface, b2 is a dvb interface, it is a satellite
communication card (a send-only interface). I wrote the device
driver for the latter.
I have used a video conferencing application to verify the communication
between the stations:
1) A generates a video stream to B up to several Mbps: NO LOSSES
2) B generates a video stream to C up to several Mbps: NO LOSSES
3) A generates a video stream to C at 100-200 kbps and I get 5 to
30 % loss rate
1) ensures that the connectivity between A and B is fine
2) ensures that the connectivity between B and C is fine
3) shows that there is a routing pb !!!
Beside this, it is not the first time I have used this network
configuration, it used to work very well on another a fbsd router
running a one year old snapshot.
I have got absolutely no idea where my pb comes from, I have checked
IRQs, probable overlapping ports and everything looks fine to me. I do
not think it comes from my driver because of 2) and because it used to
work very well before I changed the PC and the fbsd OS version.
I join the output of the dmesg in case this can help...
Thanks a lot for any help!
Emmanuel
PS: For information the send-only interface (dvtx0) has an ISA bus and
performs DMA transfers
-------
Copyright (c) 1992-1997 FreeBSD Inc.
Copyright (c) 1982, 1986, 1989, 1991, 1993
The Regents of the University of California. All rights reserved.
FreeBSD 2.2.2-RELEASE #5: Wed Nov 19 21:10:31 GMT 1997
eduros@pacman.inria.fr:/usr/src/sys/compile/PACMAN_TX
CPU: Pentium Pro (199.43-MHz 686-class CPU)
Origin = "GenuineIntel" Id = 0x619 Stepping=9
Features=0xfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,<b11>,MTRR,PGE,MCA,CMOV>
real memory = 67108864 (65536K bytes)
avail memory = 62619648 (61152K bytes)
Probing for devices on PCI bus 0:
chip0 <Intel 82440FX (Natoma) PCI and memory controller> rev 2 on pci0:0
chip1 <Intel 82371SB PCI-ISA bridge> rev 1 on pci0:7:0
chip2 <Intel 82371SB IDE interface> rev 0 on pci0:7:1
vga0 <VGA-compatible display device> rev 1 int a irq 10 on pci0:17
de0 <Digital 21041 Ethernet> rev 17 int a irq 15 on pci0:18
de0: 21041 [10Mb/s] pass 1.1
de0: address 00:00:c0:6b:ea:df
chip3 <generic PCI bridge (vendor=8086 device=0960 subclass=4)> rev 1 on pci0:20:0
pci0:20:1: Intel Corporation, device=0x1960, class=memory (misc) int a irq 9 [no driver assigned]
Probing for devices on PCI bus 1:
ahc0 <Adaptec 2940 Ultra SCSI host adapter> rev 0 int a irq 10 on pci1:1
ahc0: aic7880 Wide Channel, SCSI Id=7, 16 SCBs
ahc0 waiting for scsi devices to settle
(ahc0:0:0): "CONNER CFP2107W 2.14GB 1524" type 0 fixed SCSI 2
sd0(ahc0:0:0): Direct-Access 2048MB (4194304 512 byte sectors)
Probing for devices on the ISA bus:
sc0 at 0x60-0x6f irq 1 on motherboard
sc0: VGA color <16 virtual consoles, flags=0x0>
sio0 at 0x3f8-0x3ff irq 4 on isa
sio0: type 16550A
sio1 at 0x2f8-0x2ff irq 3 on isa
sio1: type 16550A
fdc0 at 0x3f0-0x3f7 irq 6 drq 2 on isa
fdc0: NEC 72065B
fd0: 1.44MB 3.5in
wdc0 at 0x1f0-0x1f7 irq 14 on isa
wdc0: unit 0 (atapi): <Pioneer CD-ROM ATAPI Model DR-A12X 0100/E1.00A>, removable, ovlap, dma, iordis
wcd0: 2066Kb/sec, 128Kb cache, audio play, 256 volume levels, ejectable tray
wcd0: no disc inside, unlocked
dvtx0: 0.9b1 version - Probing...
dvtx0 at 0x310 irq 11 drq 5 on isa
npx0 on motherboard
npx0: INT 16 interface
ccd0-3: Concatenated disk drivers
de0: enabling 10baseT port
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