ip stack broken?

When I use a current kernel, my system will obtain an ip address via 
dhclient, but thereafter, it cannot see the network.

I have tried switching ethernet cards. (used both a dc0 and an fxp0)
Am currently using a 5.1-RELEASE kernel to have network access.

Advice?

BOOT MESSAGES:



Oct 17 18:37:07 duron kernel: Copyright (c) 1992-2003 The FreeBSD Project.
Oct 17 18:37:07 duron kernel: Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
Oct 17 18:37:07 duron kernel: The Regents of the University of California. All rights reserved.
Oct 17 18:37:07 duron kernel: FreeBSD 5.1-CURRENT #1: Fri Oct 17 15:31:54 EDT 2003
Oct 17 18:37:07 duron kernel: root_at_duron.rv1.dynip.com:/usr/src/sys/i386/compile/athlon
Oct 17 18:37:07 duron kernel: Preloaded elf kernel "/boot/kernel/kernel" at 0xc0a8a000.
Oct 17 18:37:07 duron kernel: Preloaded elf module "/boot/kernel/vesa.ko" at 0xc0a8a1f4.
Oct 17 18:37:07 duron kernel: Preloaded elf module "/boot/kernel/snd_sb16.ko" at 0xc0a8a2a0.
Oct 17 18:37:07 duron kernel: Preloaded elf module "/boot/kernel/snd_sbc.ko" at 0xc0a8a350.
Oct 17 18:37:07 duron kernel: Preloaded elf module "/boot/kernel/snd_pcm.ko" at 0xc0a8a3fc.
Oct 17 18:37:07 duron kernel: Preloaded elf module "/boot/kernel/bktr.ko" at 0xc0a8a4a8.
Oct 17 18:37:07 duron kernel: Preloaded elf module "/boot/kernel/bktr_mem.ko" at 0xc0a8a554.
Oct 17 18:37:07 duron kernel: Preloaded elf module "/boot/kernel/aio.ko" at 0xc0a8a604.
Oct 17 18:37:07 duron kernel: Preloaded elf module "/boot/kernel/r128.ko" at 0xc0a8a6ac.
Oct 17 18:37:07 duron kernel: Preloaded elf module "/boot/kernel/acpi.ko" at 0xc0a8a758.
Oct 17 18:37:07 duron kernel: Timecounter "i8254" frequency 1193182 Hz quality 0
Oct 17 18:37:07 duron kernel: CPU: AMD Athlon(tm) processor (1200.05-MHz 686-class CPU)
Oct 17 18:37:07 duron kernel: Origin = "AuthenticAMD"  Id = 0x642  Stepping = 2
Oct 17 18:37:07 duron kernel: Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
Oct 17 18:37:07 duron kernel: AMD Features=0xc0440000<RSVD,AMIE,DSP,3DNow!>
Oct 17 18:37:07 duron kernel: real memory  = 402587648 (383 MB)
Oct 17 18:37:07 duron kernel: avail memory = 381362176 (363 MB)
Oct 17 18:37:07 duron kernel: bktr_mem: memory holder loaded
Oct 17 18:37:07 duron kernel: Pentium Pro MTRR support enabled
Oct 17 18:37:07 duron kernel: VESA: v2.0, 32768k memory, flags:0x1, mode table:0xc09c6a02 (1000022)
Oct 17 18:37:07 duron kernel: VESA: ATI RAGE128
Oct 17 18:37:07 duron kernel: npx0: [FAST]
Oct 17 18:37:07 duron kernel: npx0: <math processor> on motherboard
Oct 17 18:37:07 duron kernel: npx0: INT 16 interface
Oct 17 18:37:07 duron kernel: acpi0: <VIA694 AWRDACPI> on motherboard
Oct 17 18:37:07 duron kernel: pcibios: BIOS version 2.10
Oct 17 18:37:07 duron kernel: Using $PIR table, 7 entries at 0xc00fdd50
Oct 17 18:37:07 duron kernel: acpi0: Power Button (fixed)
Oct 17 18:37:07 duron kernel: Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000
Oct 17 18:37:07 duron kernel: acpi_timer0: <24-bit timer at 3.579545MHz> port 0x4008-0x400b on acpi0
Oct 17 18:37:07 duron kernel: acpi_cpu0: <CPU> on acpi0
Oct 17 18:37:07 duron kernel: acpi_button0: <Power Button> on acpi0
Oct 17 18:37:07 duron kernel: acpi_button1: <Sleep Button> on acpi0
Oct 17 18:37:07 duron kernel: pcib0: <ACPI Host-PCI bridge> port 0x6000-0x607f,0x5000-0x500f,0x4080-0x40ff,0x4000-0x407f,0xcf8-0xcff on acpi0
Oct 17 18:37:07 duron kernel: pci0: <ACPI PCI bus> on pcib0
Oct 17 18:37:07 duron kernel: pcib0: slot 7 INTD is routed to irq 10
Oct 17 18:37:07 duron kernel: pcib0: slot 7 INTD is routed to irq 10
Oct 17 18:37:07 duron kernel: pcib0: slot 11 INTA is routed to irq 9
Oct 17 18:37:07 duron kernel: pcib0: slot 11 INTA is routed to irq 9
Oct 17 18:37:07 duron kernel: pcib0: slot 18 INTA is routed to irq 11
Oct 17 18:37:07 duron kernel: pcib0: slot 20 INTA is routed to irq 10
Oct 17 18:37:07 duron kernel: agp0: <VIA 82C8363 (Apollo KT133A) host to PCI bridge> mem 0xd0000000-0xd3ffffff at device 0.0 on pci0
Oct 17 18:37:07 duron kernel: pcib1: <PCI-PCI bridge> at device 1.0 on pci0
Oct 17 18:37:07 duron kernel: pci1: <PCI bus> on pcib1
Oct 17 18:37:07 duron kernel: pcib0: slot 1 INTA is routed to irq 12
Oct 17 18:37:07 duron kernel: pcib1: slot 0 INTA is routed to irq 12
Oct 17 18:37:07 duron kernel: drm0: <ATI Rage 128 Pro Ultra TF (AGP)> port 0x9000-0x90ff mem 0xd9000000-0xd9003fff,0xd4000000-0xd7ffffff irq 12 at device 0.0 on pci1
Oct 17 18:37:07 duron kernel: info: [drm] AGP at 0xd0000000 64MB
Oct 17 18:37:07 duron kernel: info: [drm] Initialized r128 2.5.0 20030725 on minor 0
Oct 17 18:37:07 duron kernel: isab0: <PCI-ISA bridge> at device 7.0 on pci0
Oct 17 18:37:07 duron kernel: isa0: <ISA bus> on isab0
Oct 17 18:37:07 duron kernel: atapci0: <VIA 82C686B UDMA100 controller> port 0xa000-0xa00f at device 7.1 on pci0
Oct 17 18:37:07 duron kernel: atapci0: Correcting VIA config for southbridge data corruption bug
Oct 17 18:37:07 duron kernel: ata0: at 0x1f0 irq 14 on atapci0
Oct 17 18:37:07 duron kernel: ata0: [MPSAFE]
Oct 17 18:37:07 duron kernel: ata1: at 0x170 irq 15 on atapci0
Oct 17 18:37:07 duron kernel: ata1: [MPSAFE]
Oct 17 18:37:07 duron kernel: uhci0: <VIA 83C572 USB controller> port 0xa400-0xa41f irq 10 at device 7.2 on pci0
Oct 17 18:37:07 duron kernel: usb0: <VIA 83C572 USB controller> on uhci0
Oct 17 18:37:07 duron kernel: usb0: USB revision 1.0
Oct 17 18:37:07 duron kernel: uhub0: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
Oct 17 18:37:07 duron kernel: uhub0: 2 ports with 2 removable, self powered
Oct 17 18:37:07 duron kernel: ums0: Microsoft Microsoft Wheel Mouse Optical®, rev 1.10/1.21, addr 2, iclass 3/1
Oct 17 18:37:07 duron kernel: ums0: 3 buttons and Z dir.
Oct 17 18:37:07 duron kernel: uhci1: <VIA 83C572 USB controller> port 0xa800-0xa81f irq 10 at device 7.3 on pci0
Oct 17 18:37:07 duron kernel: usb1: <VIA 83C572 USB controller> on uhci1
Oct 17 18:37:07 duron kernel: usb1: USB revision 1.0
Oct 17 18:37:07 duron kernel: uhub1: VIA UHCI root hub, class 9/0, rev 1.00/1.00, addr 1
Oct 17 18:37:07 duron kernel: uhub1: 2 ports with 2 removable, self powered
Oct 17 18:37:07 duron kernel: pci0: <bridge, PCI-unknown> at device 7.4 (no driver attached)
Oct 17 18:37:07 duron kernel: bktr0: <BrookTree 878> mem 0xdb004000-0xdb004fff irq 9 at device 11.0 on pci0
Oct 17 18:37:07 duron kernel: bktr0: Hauppauge Model 61381 D123
Oct 17 18:37:07 duron kernel: bktr0: Detected a MSP3430G-A1 at 0x80
Oct 17 18:37:07 duron kernel: bktr0: Hauppauge WinCast/TV, Philips FR1236 NTSC FM tuner, msp3400c stereo, remote control.
Oct 17 18:37:07 duron kernel: pci0: <multimedia> at device 11.1 (no driver attached)
Oct 17 18:37:07 duron kernel: atapci1: <Promise PDC20268 UDMA100 controller> port 0xbc00-0xbc0f,0xb800-0xb803,0xb400-0xb407,0xb000-0xb003,0xac00-0xac07 mem 0xdb000000-0xdb003fff irq 11 at device 18.0 on pci0
Oct 17 18:37:07 duron kernel: atapci1: [MPSAFE]
Oct 17 18:37:07 duron kernel: ata2: at 0xac00 on atapci1
Oct 17 18:37:07 duron kernel: ata2: [MPSAFE]
Oct 17 18:37:07 duron kernel: ata3: at 0xb400 on atapci1
Oct 17 18:37:07 duron kernel: ata3: [MPSAFE]
Oct 17 18:37:07 duron kernel: dc0: <82c169 PNIC 10/100BaseTX> port 0xc000-0xc0ff mem 0xdb006000-0xdb0060ff irq 10 at device 20.0 on pci0
Oct 17 18:37:07 duron kernel: dc0: Ethernet address: 00:c0:f0:48:75:62
Oct 17 18:37:07 duron kernel: miibus0: <MII bus> on dc0
Oct 17 18:37:07 duron kernel: ukphy0: <Generic IEEE 802.3u media interface> on miibus0
Oct 17 18:37:07 duron kernel: ukphy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
Oct 17 18:37:07 duron kernel: fdc0: <Enhanced floppy controller (i82077, NE72065 or clone)> port 0x3f7,0x3f0-0x3f5 irq 6 drq 2 on acpi0
Oct 17 18:37:07 duron kernel: fdc0: FIFO enabled, 8 bytes threshold
Oct 17 18:37:07 duron kernel: fd0: <1440-KB 3.5" drive> on fdc0 drive 0
Oct 17 18:37:07 duron kernel: sio0 port 0x3f8-0x3ff irq 4 on acpi0
Oct 17 18:37:07 duron kernel: sio0: type 16550A
Oct 17 18:37:07 duron kernel: sio1 port 0x2f8-0x2ff irq 3 on acpi0
Oct 17 18:37:07 duron kernel: sio1: type 16550A
Oct 17 18:37:07 duron kernel: ppc0 port 0x378-0x37f irq 7 on acpi0
Oct 17 18:37:07 duron kernel: ppc0: Generic chipset (EPP/NIBBLE) in COMPATIBLE mode
Oct 17 18:37:07 duron kernel: ppbus0: <Parallel port bus> on ppc0
Oct 17 18:37:07 duron kernel: plip0: <PLIP network interface> on ppbus0
Oct 17 18:37:07 duron kernel: lpt0: <Printer> on ppbus0
Oct 17 18:37:07 duron kernel: lpt0: Interrupt-driven port
Oct 17 18:37:07 duron kernel: ppi0: <Parallel I/O> on ppbus0
Oct 17 18:37:07 duron kernel: atkbdc0: <Keyboard controller (i8042)> port 0x64,0x60 irq 1 on acpi0
Oct 17 18:37:07 duron kernel: atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
Oct 17 18:37:07 duron kernel: kbd0 at atkbd0
Oct 17 18:37:07 duron kernel: orm0: <Option ROMs> at iomem 0xd0000-0xd27ff,0xcc000-0xcffff,0xc0000-0xcbfff on isa0
Oct 17 18:37:07 duron kernel: pmtimer0 on isa0
Oct 17 18:37:07 duron kernel: sc0: <System console> at flags 0x100 on isa0
Oct 17 18:37:07 duron kernel: sc0: VGA <16 virtual consoles, flags=0x300>
Oct 17 18:37:07 duron kernel: vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
Oct 17 18:37:07 duron kernel: sbc0: <Creative SB AWE64> at port 0x388-0x38b,0x330-0x331,0x220-0x22f irq 5 drq 5,1 on isa0
Oct 17 18:37:07 duron kernel: pcm0: <SB16 DSP 4.16> on sbc0
Oct 17 18:37:07 duron kernel: Timecounter "TSC" frequency 1200053788 Hz quality 800
Oct 17 18:37:07 duron kernel: Timecounters tick every 10.000 msec
Oct 17 18:37:07 duron kernel: acpi_cpu: throttling enabled, 2 steps (100% to 50.0%), currently 100.0%
Oct 17 18:37:07 duron kernel: acd0: CDRW <SONY CD-RW CRX0811> at ata0-master WDMA2
Oct 17 18:37:07 duron kernel: acd1: DVDROM <DVD1648/BKH> at ata1-master UDMA33
Oct 17 18:37:07 duron kernel: GEOM: create disk ad4 dp=0xc3b42d70
Oct 17 18:37:07 duron kernel: ad4: 76351MB <SAMSUNG SP8004H> [155127/16/63] at ata2-master UDMA100
Oct 17 18:37:07 duron kernel: (probe2:ata1:0:0:0): Recovered Sense
Oct 17 18:37:07 duron kernel: (probe2:ata1:0:0:0): INQUIRY. CDB: 12 1 80 0 ff 0 
Oct 17 18:37:07 duron kernel: (probe2:ata1:0:0:0): CAM Status: SCSI Status Error
Oct 17 18:37:07 duron kernel: (probe2:ata1:0:0:0): SCSI Status: Check Condition
Oct 17 18:37:07 duron kernel: (probe2:ata1:0:0:0): ILLEGAL REQUEST asc:24,0
Oct 17 18:37:07 duron kernel: (probe2:ata1:0:0:0): Invalid field in CDB
Oct 17 18:37:07 duron kernel: (probe2:ata1:0:0:0): Recovered Sense
Oct 17 18:37:07 duron kernel: (probe2:ata1:0:0:0): INQUIRY. CDB: 12 1 80 0 ff 0 
Oct 17 18:37:07 duron kernel: (probe2:ata1:0:0:0): CAM Status: SCSI Status Error
Oct 17 18:37:07 duron kernel: (probe2:ata1:0:0:0): SCSI Status: Check Condition
Oct 17 18:37:07 duron kernel: (probe2:ata1:0:0:0): ILLEGAL REQUEST asc:24,0
Oct 17 18:37:07 duron kernel: (probe2:ata1:0:0:0): Invalid field in CDB
Oct 17 18:37:07 duron kernel: GEOM: create disk cd0 dp=0xc3abde00
Oct 17 18:37:07 duron kernel: GEOM: create disk cd1 dp=0xc3abd600
Oct 17 18:37:07 duron kernel: cd0 at ata0 bus 0 target 0 lun 0
Oct 17 18:37:07 duron kernel: cd0: <SONY CD-RW CRX0811 MYS2> Removable CD-ROM SCSI-0 device 
Oct 17 18:37:07 duron kernel: cd0: 16.000MB/s transfers
Oct 17 18:37:07 duron kernel: cd0: cd present [1 x 2048 byte records]
Oct 17 18:37:07 duron kernel: (cd1:ata1:0:0:0): Recovered Sense
Oct 17 18:37:07 duron kernel: (cd1:ata1:0:0:0): READ CD RECORDED CAPACITY. CDB: 25 0 0 0 0 0 0 0 0 0 
Oct 17 18:37:07 duron kernel: (cd1:ata1:0:0:0): CAM Status: SCSI Status Error
Oct 17 18:37:07 duron kernel: (cd1:ata1:0:0:0): SCSI Status: Check Condition
Oct 17 18:37:07 duron kernel: (cd1:ata1:0:0:0): NOT READY asc:3a,0
Oct 17 18:37:07 duron kernel: (cd1:ata1:0:0:0): Medium not present
Oct 17 18:37:07 duron kernel: cd1 at ata1 bus 0 target 0 lun 0
Oct 17 18:37:07 duron kernel: cd1: <DVD-16X DVD1648/BKH A001> Removable CD-ROM SCSI-0 device 
Oct 17 18:37:07 duron kernel: cd1: 33.000MB/s transfers
Oct 17 18:37:07 duron kernel: cd1: Attempt to query device size failed: NOT READY, Medium not present
Oct 17 18:37:07 duron kernel: (cd0:ata0:0:0:0): Recovered Sense
Oct 17 18:37:07 duron kernel: (cd0:ata0:0:0:0): READ TOC/PMA/ATIP {MMC Proposed}. CDB: 43 0 0 0 0 0 0 0 4 0 
Oct 17 18:37:07 duron kernel: (cd0:ata0:0:0:0): CAM Status: SCSI Status Error
Oct 17 18:37:07 duron kernel: (cd0:ata0:0:0:0): SCSI Status: Check Condition
Oct 17 18:37:07 duron kernel: (cd0:ata0:0:0:0): ILLEGAL REQUEST asc:24,0
Oct 17 18:37:07 duron kernel: (cd0:ata0:0:0:0): Invalid field in CDB
Oct 17 18:37:07 duron kernel: (cd0:ata0:0:0:0): Recovered Sense
Oct 17 18:37:07 duron kernel: (cd0:ata0:0:0:0): READ TOC/PMA/ATIP {MMC Proposed}. CDB: 43 0 0 0 0 0 0 0 4 0 
Oct 17 18:37:07 duron kernel: (cd0:ata0:0:0:0): CAM Status: SCSI Status Error
Oct 17 18:37:07 duron kernel: (cd0:ata0:0:0:0): SCSI Status: Check Condition
Oct 17 18:37:07 duron kernel: (cd0:ata0:0:0:0): ILLEGAL REQUEST asc:24,0
Oct 17 18:37:07 duron kernel: (cd0:ata0:0:0:0): Invalid field in CDB
Oct 17 18:37:07 duron kernel: Mounting root from ufs:/dev/ad4s1a