Date: Fri, 13 Jan 2006 13:09:17 +1030 From: "Daniel O'Connor" <doconnor@gsoft.com.au> To: freebsd-stable@freebsd.org Cc: Tom Jobbins <tomjobbins@gmail.com> Subject: Re: Two PPP connections to the same ISP with same remote gateway Message-ID: <200601131309.24446.doconnor@gsoft.com.au> In-Reply-To: <a3d37d280601121337y64ec3965r@mail.gmail.com> References: <a3d37d280601121337y64ec3965r@mail.gmail.com>
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On Fri, 13 Jan 2006 08:07, Tom Jobbins wrote:
> This can be demonstrated from the command line with the following:
> [root@magrathea:~]$ ifconfig tun0 1.2.3.5 1.2.3.250
> [root@magrathea:~]$ ifconfig tun1 1.2.4.4 1.2.3.250
> ifconfig: ioctl (SIOCAIFADDR): File exists
This is really odd, because I don't see this on my machines (as per our dis=
cussion on IRC which you mention below), I did..
midget# uname -a
=46reeBSD midget.dons.net.au 5.4-STABLE FreeBSD 5.4-STABLE #4: Mon Aug 1 0=
9:01:42 CST 2005 darius@midget.dons.net.au:/usr/src/sys/i386/compile/MID=
GET i386
midget# cat /dev/tun &
[1] 21524
midget# cat /dev/tun &
[2] 21525
midget# ifconfig tun0
tun0: flags=3D8010<POINTOPOINT,MULTICAST> mtu 1500
midget# ifconfig tun1
tun1: flags=3D8010<POINTOPOINT,MULTICAST> mtu 1500
Opened by PID 21524
midget# ifconfig tun2
tun2: flags=3D8010<POINTOPOINT,MULTICAST> mtu 1500
Opened by PID 21525
midget# ifconfig tun1 1.2.3.4 1.2.3.254
midget# ifconfig tun2 1.2.3.5 1.2.3.254
midget# ifconfig tun1
tun1: flags=3D8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500
inet 1.2.3.4 --> 1.2.3.254 netmask 0xff000000
inet6 fe80::290:27ff:fe45:a94%tun1 prefixlen 64 scopeid 0x8
Opened by PID 21524
midget# ifconfig tun2
tun2: flags=3D8051<UP,POINTOPOINT,RUNNING,MULTICAST> mtu 1500
inet 1.2.3.5 --> 1.2.3.254 netmask 0xff000000
inet6 fe80::290:27ff:fe45:a94%tun2 prefixlen 64 scopeid 0x9
Opened by PID 21525
I also tried with a netmask of 255.255.255.255 - same result.
my sysctl.conf contains..
net.inet.ip.fw.one_pass=3D0
hw.intr_storm_threshold=3D15000
hw.snd.maxautovchans=3D4
hw.snd.pcm0.vchans=3D4
My kernel config is pretty standard - I've attached it if you want to look=
=20
through it.
I also tried it on a 6.0 amd64 machine -=20
=46reeBSD eureka.gsoft.com.au 6.0-RC1 FreeBSD 6.0-RC1 #0: Wed Oct 26 13:29:=
47 UTC 2005 root@chungli-pr.gsoft.com.au:/usr/obj/local0/src/sys/GENESI=
S amd64
Same result..
=2D-=20
Daniel O'Connor software and network engineer
for Genesis Software - http://www.gsoft.com.au
"The nice thing about standards is that there
are so many of them to choose from."
-- Andrew Tanenbaum
GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C
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machine i386
cpu I686_CPU
ident MIDGET
options SCHED_4BSD # 4BSD scheduler
options INET # InterNETworking
options INET6 # IPv6 communications protocols
options FFS # Berkeley Fast Filesystem
options SOFTUPDATES # Enable FFS soft updates support
options UFS_ACL # Support for access control lists
options UFS_DIRHASH # Improve performance on big directories
options MD_ROOT # MD is a potential root device
options PSEUDOFS # Pseudo-filesystem framework
options GEOM_GPT # GUID Partition Tables.
options COMPAT_43 # Compatible with BSD 4.3 [KEEP THIS!]
options COMPAT_FREEBSD4 # Compatible with FreeBSD4
options SCSI_DELAY=1000 # Delay (in ms) before probing SCSI
options KTRACE # ktrace(1) support
options SYSVSHM # SYSV-style shared memory
options SYSVMSG # SYSV-style message queues
options SYSVSEM # SYSV-style semaphores
options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions
options KBD_INSTALL_CDEV # install a CDEV entry in /dev
options ADAPTIVE_GIANT # Giant mutex is adaptive.
device apic # I/O APIC
# Bus support. Do not remove isa, even if you have no isa slots
device isa
device pci
# Floppy drives
device fdc
# ATA and ATAPI devices
device ata
device atadisk # ATA disk drives
device ataraid # ATA RAID drives
device atapicd # ATAPI CDROM drives
device atapicam
# SCSI peripherals
device scbus # SCSI bus (required for SCSI)
device ch # SCSI media changers
device da # Direct Access (disks)
device sa # Sequential Access (tape etc)
device cd # CD
device pass # Passthrough device (direct SCSI access)
# atkbdc0 controls both the keyboard and the PS/2 mouse
device atkbdc # AT keyboard controller
device atkbd # AT keyboard
device psm # PS/2 mouse
device vga # VGA video card driver
device splash # Splash screen and screen saver support
# syscons is the default console driver, resembling an SCO console
device sc
device agp # support several AGP chipsets
# Floating point support - do not disable.
device npx
# Add suspend/resume support for the i8254.
device pmtimer
# Serial (COM) ports
device sio # 8250, 16[45]50 based serial ports
# Parallel port
device ppc
device ppbus # Parallel port bus (required)
device lpt # Printer
device plip # TCP/IP over parallel
device ppi # Parallel port interface device
# Pseudo devices.
device loop # Network loopback
device mem # Memory and kernel memory devices
device io # I/O device
device random # Entropy device
device ether # Ethernet support
device bpf # Berkeley packet filter
device pf #PF OpenBSD packet-filter firewall
device pflog #logging support interface for PF
device pfsync #synchronization interface for PF
# altq(9). Enable the base part of the hooks with the ALTQ option.
# Individual disciplines must be built into the base system and can not be
# loaded as modules at this point. In order to build a SMP kernel you must
# also have the ALTQ_NOPCC option.
options ALTQ
options ALTQ_CBQ # Class based queuing
options ALTQ_RED # Random Early Detection
options ALTQ_RIO # RED In/Out
options ALTQ_HFSC # Hierarchical Packet Scheduler
options ALTQ_CDNR # Traffic conditioner
options ALTQ_PRIQ # Priority Queueing
options IPFIREWALL
options IPFIREWALL_DEFAULT_TO_ACCEPT
options IPDIVERT
device pty
device nmdm
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