I have a physical interface with no address:

em3: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
        lladdr 00:04:23:d7:71:4a
        description: dmz zone
        groups: dmz
        media: Ethernet autoselect (1000baseT
full-duplex,master,rxpause,txpause)
        status: active
        inet6 fe80::204:23ff:fed7:714a%em3 prefixlen 64 scopeid 0x4

being used for a carp interface:

# ifconfig carp1
carp1: flags=8943<UP,BROADCAST,RUNNING,PROMISC,SIMPLEX,MULTICAST> mtu 1500
        lladdr 00:00:5e:00:01:02
        description: dmz zone
        carp: MASTER carpdev em3 vhid 2 advbase 1 advskew 0
        groups: carp
        inet6 fe80::200:5eff:fe00:102%carp1 prefixlen 64 scopeid 0xb
        inet 216.143.151.1 netmask 0xfffffff0 broadcast 216.143.151.15
        inet 70.184.242.161 netmask 0xfffffff0 broadcast 70.184.242.175
        inet6 2001:4830:167d:5237::1 prefixlen 64
        inet6 2001:470:880a:5237::1 prefixlen 64

I'm not using an IPv4 address on em3, as I'm kind of short of public
addresses.  I do, however, have one device (Cisco 7960 phone, should you
care), on that segment that works much better with DHCP, so I want to
run dhcpd.

dhcpd refuses to run on em3, as there is no address:

Mar 31 15:52:52 right dhcpd: Can't listen on em3 - it has no IP address.

however, if one trusts tcpdump used with -i carp1 and -i em3, all those
nice broadcast bootp requests are seen on em3 only, so asking dhcpd to
listen on carp1, to my non-surprise, doesn't appear to do anything
useful.  (dhcpd doesn't log anything and nothing replies out either
carp1 or em3).

None of which is terribly surprising.  However, before I go off and burn
more IP addresses on the physical interfaces, or use a server other than
my firewall for dhcpd, I was going to ask if I was missing a more
elegant solution.

Is there anyway to convince a carp device that it wants to pay attention
to broadcasts?

Obligatory dmesg found below.

Thanks.

--Jon Radel



OpenBSD 4.2-stable (GENERIC) #0: Wed Mar 26 16:54:32 UTC 2008
    [EMAIL PROTECTED]:/usr/src/sys/arch/i386/compile/GENERIC
RTC BIOS diagnostic error 80<clock_battery>
cpu0: Intel(R) Pentium(R) 4 CPU 2.80GHz ("GenuineIntel" 686-class) 2.80 GHz
cpu0:
FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,SBF,SSE3,MWAIT,DS-CPL,TM2,CNXT-ID,CX16,xTPR
real mem  = 509440000 (485MB)
avail mem = 484925440 (462MB)
RTC BIOS diagnostic error 80<clock_battery>
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 11/01/06, SMBIOS rev. 2.4 @
0xe4410 (31 entries)
bios0: vendor Intel Corp. version "MQ96510J.86A.1545.2006.1101.2008"
date 11/01/2006
bios0: Intel Corporation DG965SS
apm0 at bios0: Power Management spec V1.2
apm0: battery life expectancy 0%
apm0: AC off, battery charge unknown, estimated 0:00 hours
apm0: flags 30102 dobusy 0 doidle 1
pcibios at bios0 function 0x1a not configured
bios0: ROM list: 0xc0000/0xb000!
cpu0 at mainbus0
pci0 at mainbus0 bus 0: configuration mode 1 (no bios)
pchb0 at pci0 dev 0 function 0 "Intel 82965 MCH" rev 0x02
vga1 at pci0 dev 2 function 0 "Intel 82965 Video" rev 0x02: can't map
mmadr registers
: AGP GART
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
"Intel 82965 HECI" rev 0x02 at pci0 dev 3 function 0 not configured
em0 at pci0 dev 25 function 0 "Intel ICH8 IGP C" rev 0x02: irq 9,
address 00:16:76:b5:94:b7
uhci0 at pci0 dev 26 function 0 "Intel 82801H USB" rev 0x02: irq 11
uhci1 at pci0 dev 26 function 1 "Intel 82801H USB" rev 0x02: irq 10
ehci0 at pci0 dev 26 function 7 "Intel 82801H USB" rev 0x02: irq 11
usb0 at ehci0: USB revision 2.0
uhub0 at usb0: Intel EHCI root hub, rev 2.00/1.00, addr 1
ppb0 at pci0 dev 28 function 0 "Intel 82801H PCIE" rev 0x02
pci1 at ppb0 bus 1
ppb1 at pci0 dev 28 function 1 "Intel 82801H PCIE" rev 0x02
pci2 at ppb1 bus 2
pciide0 at pci2 dev 0 function 0 "Marvell 88SE6101 IDE" rev 0xb1: DMA
(unsupported), channel 0 configured to native-PCI, channel 1 configured
to native-PCI
pciide0: using irq 9 for native-PCI interrupt
pciide0: channel 0 ignored (not responding; disabled or no drives?)
pciide0: channel 1 ignored (not responding; disabled or no drives?)
ppb2 at pci0 dev 28 function 2 "Intel 82801H PCIE" rev 0x02
pci3 at ppb2 bus 3
ppb3 at pci0 dev 28 function 3 "Intel 82801H PCIE" rev 0x02
pci4 at ppb3 bus 4
ppb4 at pci0 dev 28 function 4 "Intel 82801H PCIE" rev 0x02
pci5 at ppb4 bus 5
uhci2 at pci0 dev 29 function 0 "Intel 82801H USB" rev 0x02: irq 10
uhci3 at pci0 dev 29 function 1 "Intel 82801H USB" rev 0x02: irq 11
uhci4 at pci0 dev 29 function 2 "Intel 82801H USB" rev 0x02: irq 11
ehci1 at pci0 dev 29 function 7 "Intel 82801H USB" rev 0x02: irq 10
usb1 at ehci1: USB revision 2.0
uhub1 at usb1: Intel EHCI root hub, rev 2.00/1.00, addr 1
ppb5 at pci0 dev 30 function 0 "Intel 82801BA AGP" rev 0xf2
pci6 at ppb5 bus 6
em1 at pci6 dev 0 function 0 "Intel PRO/1000MT (82546GB)" rev 0x03: irq
10, address 00:04:23:d7:72:26
em2 at pci6 dev 0 function 1 "Intel PRO/1000MT (82546GB)" rev 0x03: irq
11, address 00:04:23:d7:72:27
em3 at pci6 dev 1 function 0 "Intel PRO/1000MT (82546GB)" rev 0x03: irq
11, address 00:04:23:d7:71:4a
em4 at pci6 dev 1 function 1 "Intel PRO/1000MT (82546GB)" rev 0x03: irq
10, address 00:04:23:d7:71:4b
ichpcib0 at pci0 dev 31 function 0 "Intel 82801H LPC" rev 0x02: PM disabled
pciide1 at pci0 dev 31 function 2 "Intel 82801H SATA" rev 0x02: DMA,
channel 0 configured to native-PCI, channel 1 configured to native-PCI
pciide1: using irq 11 for native-PCI interrupt
wd0 at pciide1 channel 0 drive 0: <ST380811AS>
wd0: 16-sector PIO, LBA48, 76319MB, 156301488 sectors
wd0(pciide1:0:0): using PIO mode 4, Ultra-DMA mode 5
ichiic0 at pci0 dev 31 function 3 "Intel 82801H SMBus" rev 0x02: irq 10
iic0 at ichiic0
pciide2 at pci0 dev 31 function 5 "Intel 82801H SATA" rev 0x02: DMA,
channel 0 wired to native-PCI, channel 1 wired to native-PCI
pciide2: using irq 11 for native-PCI interrupt
usb2 at uhci0: USB revision 1.0
uhub2 at usb2: Intel UHCI root hub, rev 1.00/1.00, addr 1
usb3 at uhci1: USB revision 1.0
uhub3 at usb3: Intel UHCI root hub, rev 1.00/1.00, addr 1
usb4 at uhci2: USB revision 1.0
uhub4 at usb4: Intel UHCI root hub, rev 1.00/1.00, addr 1
usb5 at uhci3: USB revision 1.0
uhub5 at usb5: Intel UHCI root hub, rev 1.00/1.00, addr 1
usb6 at uhci4: USB revision 1.0
uhub6 at usb6: Intel UHCI root hub, rev 1.00/1.00, addr 1
isa0 at ichpcib0
isadma0 at isa0
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
midi0 at pcppi0: <PC speaker>
spkr0 at pcppi0
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
biomask fffd netmask fffd ttymask ffff
pctr: user-level cycle counter enabled
mtrr: Pentium Pro MTRR support
umass0 at uhub0 port 3 configuration 1 interface 0
umass0: PLEXTOR Corp. USB Storage Adapter, rev 2.00/0.00, addr 2
umass0: using ATAPI over Bulk-Only
scsibus0 at umass0: 2 targets
cd0 at scsibus0 targ 1 lun 0: <PLEXTOR, DVDR PX-708A, 1.06> SCSI0
5/cdrom removable
dkcsum: wd0 matches BIOS drive 0x80
root on wd0a swap on wd0b dump on wd0b

[demime 1.01d removed an attachment of type application/x-pkcs7-signature which 
had a name of smime.p7s]

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