Pretty sure I fixed this by 5.4. If you can reproduce in 5.4 I would be extremely interested.
.... Ken On Tue, Aug 06, 2013 at 03:12:11AM +0200, Olivier Mehani wrote: > >Synopsis: dhclient flushes manual IPv6 default route one lease renewal > >Category: system > >Environment: > System : OpenBSD 5.3 > Details : OpenBSD 5.3 (GENERIC) #53: Tue Mar 12 18:15:44 MDT 2013 > > [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC > > Architecture: OpenBSD.amd64 > Machine : amd64 > >Description: > > On a network with IPv4-only DHCP and IPv6 with no RA, I ended up with this > /etc/hostname.sis0 > > dhcp > up > inet6 2001:41D0:1:XXXX::1 56 > !/sbin/route add -inet6 default -gateway 2001:41D0:1:XXff:ff:ff:ff:ff > > This default IPv6 route drops every 5 minutes, which is also the frequency at > which dhclient refreshes its leases. > > >How-To-Repeat: > > $ sudo /sbin/route add -inet6 default -gateway 2001:41D0:1:XX:ff:ff:ff:ff > $ route -n show -inet6 | grep default > default 2001:41d0:1:XX:ff:ff:ff:ff UGS 0 > 0 > $ sudo pkill dhclient && sudo dhclient sis0 > [...] > $ route -n show -inet6 | grep default > $ > > >Fix: > > Building dhclient from CURRENT (1.260, [0]) and using it instead seems to be a > valid workaround. > > Prior the last change, bind_lease() unconditionally called flush_routes(). > However, flush_routes() in [1] is documented to be equivalent to `route -q > $rdomain -n flush -inet -iface $interface` (note the -inet), which might > contradict my understanding of the cause. > > [0] > http://www.openbsd.org/cgi-bin/cvsweb/src/sbin/dhclient/dhclient.c?rev=1.260 > [1] http://www.openbsd.org/cgi-bin/cvsweb/src/sbin/dhclient/kroute.c?rev=1.55 > > > > > dmesg: > OpenBSD 5.3 (GENERIC) #53: Tue Mar 12 18:15:44 MDT 2013 > [email protected]:/usr/src/sys/arch/amd64/compile/GENERIC > real mem = 2106527744 (2008MB) > avail mem = 2028052480 (1934MB) > mainbus0 at root > bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xe4e30 (23 entries) > bios0: vendor Intel Corp. version "LY66210M.86A.0137.2008.0104.1540" date > 01/04/2008 > bios0: OVH RPS > acpi0 at bios0: rev 0 > acpi0: sleep states S0 S1 S4 S5 > acpi0: tables DSDT FACP APIC > acpi0: wakeup devices MAC0(S4) PS2K(S4) PS2M(S4) EUSB(S3) USB_(S3) USB2(S3) > USB3(S3) AC97(S4) MC97(S4) ELAN(S4) ELAK(S4) > acpitimer0 at acpi0: 3579545 Hz, 24 bits > acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat > cpu0 at mainbus0: apid 0 (boot processor) > cpu0: Intel(R) Celeron(R) CPU 220 @ 1.20GHz, 1200.18 MHz > cpu0: > FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,TM,PBE,SSE3,DTES64,MWAIT,DS-CPL,TM2,SSSE3,CX16,xTPR,PDCM,NXE,LONG,LAHF,PERF > cpu0: 512KB 64b/line 2-way L2 cache > cpu0: apic clock running at 133MHz > ioapic0 at mainbus0: apid 4 pa 0xfec00000, version 14, 24 pins > ioapic0: misconfigured as apic 0, remapped to apid 4 > acpiprt0 at acpi0: bus 0 (PCI0) > acpiprt1 at acpi0: bus 1 (P0P1) > acpicpu0 at acpi0 > acpibtn0 at acpi0: PWRB > pci0 at mainbus0 bus 0 > pchb0 at pci0 dev 0 function 0 "SiS 662 PCI" rev 0x01 > agp at pchb0 not configured > ppb0 at pci0 dev 1 function 0 "SiS 648FX AGP" rev 0x00 > pci1 at ppb0 bus 1 > vga1 at pci1 dev 0 function 0 "SiS 6330 VGA" rev 0x04 > wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation) > wsdisplay0: screen 1-5 added (80x25, vt100 emulation) > pcib0 at pci0 dev 2 function 0 "SiS 964 ISA" rev 0x36 > pciide0 at pci0 dev 2 function 5 "SiS 5513 EIDE" rev 0x01: 964: DMA, channel > 0 wired to compatibility, channel 1 wired to compatibility > pciide0: channel 0 disabled (no drives) > pciide0: channel 1 disabled (no drives) > ohci0 at pci0 dev 3 function 0 "SiS 5597/5598 USB" rev 0x0f: apic 4 int 20, > version 1.0, legacy support > ohci1 at pci0 dev 3 function 1 "SiS 5597/5598 USB" rev 0x0f: apic 4 int 21, > version 1.0, legacy support > ohci2 at pci0 dev 3 function 2 "SiS 5597/5598 USB" rev 0x0f: apic 4 int 22, > version 1.0, legacy support > ehci0 at pci0 dev 3 function 3 "SiS 7002 USB" rev 0x00: apic 4 int 23 > ehci0: timed out waiting for BIOS > usb0 at ehci0: USB revision 2.0 > uhub0 at usb0 "SiS EHCI root hub" rev 2.00/1.00 addr 1 > sis0 at pci0 dev 4 function 0 "SiS 900 10/100BaseTX" rev 0x91: apic 4 int 19, > address 00:1c:c0:4b:be:54 > brgphy0 at sis0 phy 1: BCM54XX 10/100/1000baseT PHY, rev. 1 > pciide1 at pci0 dev 5 function 0 "SiS 181 SATA" rev 0x01: DMA > pciide1: using apic 4 int 17 for native-PCI interrupt > wd0 at pciide1 channel 0 drive 0: <TOSHIBA DT01ACA050> > wd0: 16-sector PIO, LBA48, 476940MB, 976773168 sectors > wd0(pciide1:0:0): using PIO mode 4, Ultra-DMA mode 6 > ppb1 at pci0 dev 31 function 0 "SiS PCI-PCI" rev 0x00 > pci2 at ppb1 bus 2 > isa0 at pcib0 > isadma0 at isa0 > com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo > pckbc0 at isa0 port 0x60/5 > pckbd0 at pckbc0 (kbd slot) > pckbc0: using irq 1 for kbd slot > wskbd0 at pckbd0: console keyboard, using wsdisplay0 > pcppi0 at isa0 port 0x61 > spkr0 at pcppi0 > wbsio0 at isa0 port 0x4e/2: W83627DHG rev 0x25 > lm1 at wbsio0 port 0x290/8: W83627DHG > usb1 at ohci0: USB revision 1.0 > uhub1 at usb1 "SiS OHCI root hub" rev 1.00/1.00 addr 1 > usb2 at ohci1: USB revision 1.0 > uhub2 at usb2 "SiS OHCI root hub" rev 1.00/1.00 addr 1 > usb3 at ohci2: USB revision 1.0 > uhub3 at usb3 "SiS OHCI root hub" rev 1.00/1.00 addr 1 > mtrr: Pentium Pro MTRR support > vscsi0 at root > scsibus0 at vscsi0: 256 targets > softraid0 at root > scsibus1 at softraid0: 256 targets > root on wd0a (3c6b2ba4c2cabfad.a) swap on wd0b dump on wd0b > WARNING: / was not properly unmounted > > usbdevs: > Controller /dev/usb0: > addr 1: high speed, self powered, config 1, EHCI root hub(0x0000), > SiS(0x1039), rev 1.00 > port 1 powered > port 2 powered > port 3 powered > port 4 powered > port 5 powered > port 6 powered > port 7 powered > port 8 powered > Controller /dev/usb1: > addr 1: full speed, self powered, config 1, OHCI root hub(0x0000), > SiS(0x1039), rev 1.00 > port 1 powered > port 2 powered > port 3 powered > Controller /dev/usb2: > addr 1: full speed, self powered, config 1, OHCI root hub(0x0000), > SiS(0x1039), rev 1.00 > port 1 powered > port 2 powered > port 3 powered > Controller /dev/usb3: > addr 1: full speed, self powered, config 1, OHCI root hub(0x0000), > SiS(0x1039), rev 1.00 > port 1 powered > port 2 powered
