HP-UX Reference (11i v1 05/09) - 1M System Administration Commands A-M (vol 3)

i
ifconfig(1M) ifconfig(1M)
leading 0x, with a dot-notation Internet address, or with a pseudo-
network name listed in the network table (see networks(4)). For sub-
dividing networks into sub-networks, mask must include the network
part of the local address, and the subnet part which is taken from the
host field of the address. mask must contain 1’s in the bit positions
in the 32-bit address that are to be used for the network and subnet
parts, and 0’s in the host part. The 1’s in the mask must be contigu-
ous starting from the leftmost bit position in the 32-bit field. mask
must contain at least the standard network portion, and the subnet
field must be contiguous with the network portion. The subnet field
must contain at least 1 bit. For aggregating networks into supernets,
mask must only include a portion of the network part. mask must
contain contiguous 1’s in the bit positions starting from the leftmost
bit of the 32-bit field.
prefix n (inet6 only) n indicates the length of the network prefix associated
with this interface. The primary interface (see Interface Naming
subsection given below) prefix length is always 10, and is not
configurable. The prefix option can be used only with the address
option, and only for secondary interfaces. Default: 64. Range: 1 to
128.
arp (inet only) Enable the user of the Address Resolution Protocol in
mapping between network level addresses and link level addresses
(default). If an interface already had the Address Resolution Protocol
disabled, the user must "unplumb" the interface before it can be
enabled for Address Resolution Protocol.
-arp (inet only) Disable the use of the Address Resolution Protocol. If an
interface already had the Address Resolution Protocol enabled, the
user must "unplumb" the interface before it can be disabled for
Address Resolution Protocol.
plumb Setup the Streams plumbing needed for TCP/IP for a primary inter-
face name. (See the Interface Naming subsection given below.). By
default, the
plumb operation is done automatically when an IP
address is specified for an interface.
unplumb Tear down the Streams plumbing for a primary interface name. (See
the Interface Naming subsection given below.) Secondary interface
does not require "plumbing". A secondary IPv4 interface can be
removed by assigning an IP address of 0.0.0.0 to it. Remove a secon-
dary IPv6 interface by assigning an IP address of :: to it.
Interface Naming
The interface name associated with a network card is composed of the name of the interface (e.g.
lan or
snap ), the ppa number which identifies the card instance for this interface, and an optional IP index
number which allows the configuration of multiple IP addresses for an interface. For LAN cards, the inter-
face name
lan will be used to designate Ethernet encapsulation and snap for IEEE 802.3 encapsulation.
The lanscan command can be used to display the interface name and ppa number of each interface that
is associated with a network card (see lanscan(1M)).
IPv4 and IPv6 interfaces can coexist over the same physical network interface device using the same nam-
ing scheme. IPv6 interfaces are configured using the "inet6" ifconfig subcommand. (See the IPv6 subsec-
tion given below.)
IP Index Number
Multiple IP addresses assigned to the same interface may be in different subnets. An example of an inter-
face name without an IP index number is lan0. An example of an interface name with a IP index number
is lan0:1. Note: specifying lan0:0 is equivalent to lan0.
A primary interface is an interface whose IP index number is zero. A secondary interface is an interface
whose IP index number is non-zero.
Section 1M−−348 Hewlett-Packard Company − 2 − HP-UX 11i Version 1: September 2005