diff options
authorRobert Schwebel <>2005-03-16 14:37:34 +0000
committerRobert Schwebel <>2005-03-16 14:37:34 +0000
commitc6f3feff0b1cfd4f85874a8d43b8e708fe67c2b1 (patch)
parent77938d6d3e17e8ec737167b135fa57b2c1a59253 (diff)
copied from ifconfig.8
git-svn-id: 5fd5a299-6ef2-0310-aa18-8b01d7c39d8c
1 files changed, 211 insertions, 0 deletions
diff --git a/canconfig.8 b/canconfig.8
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+.TH CANCONFIG 8 "13 March 2005" "canutils" "Linux Programmer's Manual"
+canconfig \- configure a CAN bus (Controller Area Network) interface
+.B "canconfig [interface]"
+.B "canconfig interface [aftype] options | address ..."
+.B Ifconfig
+is used to configure the kernel-resident network interfaces. It is
+used at boot time to set up interfaces as necessary. After that, it
+is usually only needed when debugging or when system tuning is needed.
+If no arguments are given,
+.B ifconfig
+displays the status of the currently active interfaces. If
+a single
+.B interface
+argument is given, it displays the status of the given interface
+only; if a single
+.B -a
+argument is given, it displays the status of all interfaces, even
+those that are down. Otherwise, it configures an interface.
+.SH Address Families
+If the first argument after the interface name is recognized as
+the name of a supported address family, that address family is
+used for decoding and displaying all protocol addresses. Currently
+supported address families include
+.B inet
+(TCP/IP, default),
+.B inet6
+.B ax25
+(AMPR Packet Radio),
+.B ddp
+(Appletalk Phase 2),
+.B ipx
+(Novell IPX) and
+.B netrom
+(AMPR Packet radio).
+.B interface
+The name of the interface. This is usually a driver name followed by
+a unit number, for example
+.B eth0
+for the first Ethernet interface.
+.B up
+This flag causes the interface to be activated. It is implicitly
+specified if an address is assigned to the interface.
+.B down
+This flag causes the driver for this interface to be shut down.
+.B "[\-]arp"
+Enable or disable the use of the ARP protocol on this interface.
+.B "[\-]promisc"
+Enable or disable the
+.B promiscuous
+mode of the interface. If selected, all packets on the network will
+be received by the interface.
+.B "[\-]allmulti"
+Enable or disable
+.B all-multicast
+mode. If selected, all multicast packets on the network will be
+received by the interface.
+.B "metric N"
+This parameter sets the interface metric.
+.B "mtu N"
+This parameter sets the Maximum Transfer Unit (MTU) of an interface.
+.B "dstaddr addr"
+Set the remote IP address for a point-to-point link (such as
+PPP). This keyword is now obsolete; use the
+.B pointopoint
+keyword instead.
+.B "netmask addr"
+Set the IP network mask for this interface. This value defaults to the
+usual class A, B or C network mask (as derived from the interface IP
+address), but it can be set to any value.
+.B "add addr/prefixlen"
+Add an IPv6 address to an interface.
+.B "del addr/prefixlen"
+Remove an IPv6 address from an interface.
+.B "tunnel"
+Create a new SIT (IPv6-in-IPv4) device, tunnelling to the given destination.
+.B "irq addr"
+Set the interrupt line used by this device. Not all devices can
+dynamically change their IRQ setting.
+.B "io_addr addr"
+Set the start address in I/O space for this device.
+.B "mem_start addr"
+Set the start address for shared memory used by this device. Only a
+few devices need this.
+.B "media type"
+Set the physical port or medium type to be used by the device. Not
+all devices can change this setting, and those that can vary in what
+values they support. Typical values for
+.B type
+.B 10base2
+(thin Ethernet),
+.B 10baseT
+(twisted-pair 10Mbps Ethernet),
+(external transceiver) and so on. The special medium type of
+.B auto
+can be used to tell the driver to auto-sense the media. Again, not
+all drivers can do this.
+.B "[-]broadcast [addr]"
+If the address argument is given, set the protocol broadcast
+address for this interface. Otherwise, set (or clear) the
+flag for the interface.
+.B "[-]pointopoint [addr]"
+This keyword enables the
+.B point-to-point
+mode of an interface, meaning that it is a direct link between two
+machines with nobody else listening on it.
+If the address argument is also given, set the protocol address of
+the other side of the link, just like the obsolete
+.B dstaddr
+keyword does. Otherwise, set or clear the
+flag for the interface.
+.B hw class address
+Set the hardware address of this interface, if the device driver
+supports this operation. The keyword must be followed by the
+name of the hardware class and the printable ASCII equivalent of
+the hardware address. Hardware classes currently supported include
+.B ether
+.B ax25
+(AMPR AX.25),
+.B ARCnet
+.B netrom
+.B multicast
+Set the multicast flag on the interface. This should not normally be needed
+as the drivers set the flag correctly themselves.
+.B address
+The IP address to be assigned to this interface.
+.B txqueuelen length
+Set the length of the transmit queue of the device. It is useful to set this
+to small values for slower devices with a high latency (modem links, ISDN)
+to prevent fast bulk transfers from disturbing interactive traffic like
+telnet too much.
+Since kernel release 2.2 there are no explicit interface statistics for
+alias interfaces anymore. The statistics printed for the original address
+are shared with all alias addresses on the same device. If you want per-address
+statistics you should add explicit accounting
+rules for the address using the
+.BR ipchains(8)
+Since net-tools 1.60-4 ifconfig is printing byte counters and human readable
+counters with IEC 60027-2 units. So 1 KiB are 2^10 byte. Note, the numbers
+are truncated to one decimal (which can by quite a large error if you
+consider 0.1 PiB is 112.589.990.684.262 bytes :)
+Interrupt problems with Ethernet device drivers fail with EAGAIN
+.I (SIOCSIIFLAGS: Resource temporarily unavailable)
+it is most likely a interrupt conflict. See
+for more information.
+.I /proc/net/socket
+.I /proc/net/dev
+.I /proc/net/if_inet6
+While appletalk DDP and IPX addresses will be displayed they cannot be
+altered by this command.
+route(8), netstat(8), arp(8), rarp(8), ipchains(8)
+ - Prefixes for binary multiples
+Fred N. van Kempen, <>
+Alan Cox, <>
+Phil Blundell, <>
+Andi Kleen;
+Bernd Eckenfels, <>