MirOS Manual: bridgename.if(5), hostname.if(5)

HOSTNAME.IF(5)               BSD Reference Manual               HOSTNAME.IF(5)

NAME

     hostname.if, bridgename.if - interface-specific configuration files

DESCRIPTION

     The hostname.* and bridgename.* files contain information regarding the
     configuration of each network interface. One file should exist for each
     interface that is to be configured, such as hostname.fxp0 or
     bridgename.bridge0. However, a configuration file is not needed for lo0.
     Note that multiple entries can be used per configuration file.

     Arguments containing either whitespace or single quote characters must be
     double quoted. For example:

           inet 10.0.0.1 255.255.255.0 10.0.0.255 description "Bob's uplink"

STATIC ADDRESS CONFIGURATION

     The following three hostname.* formats are valid for configuring network
     interfaces with static addresses:

     Regular IPv4 network setup:

           addr_family [alias] addr netmask broadcast_addr options
           dest dest_addr
           route [+n] options

     Regular IPv6 network setup:

           addr_family [alias] addr prefixlen options
           route [+n] options

     Other network setup:

           addr_family options

     A typical file contains only one line, but more extensive files are pos-
     sible, for example:

      inet 10.0.1.12 255.255.255.0 10.0.1.255 media 100baseTX description Uplink
      inet alias 10.0.1.13 255.255.255.255 10.0.1.13
      inet alias 10.0.1.14 255.255.255.255 NONE
      inet alias 10.0.1.15 255.255.255.255
      inet alias 10.0.1.16 0xffffffff
      inet6 alias fec0::1 64
      inet6 alias fec0::2 64 anycast
      route add default 10.0.1.254
      route +n add -inet6 default myrouter.mydomain.com
      # This is an example comment line.
      !wicontrol \$if -t 2  # Set to 2Mbps

     The above formats have the following field values:

           addr_family
                   The address family of the interface, generally "inet" or
                   "inet6".

           addr    The optional address that belongs to the interface, such as
                   190.191.192.1 or fe80:2::1. It is also feasible to use a
                   hostname as specified in /etc/hosts. It is recommended that
                   an address be used instead of symbolic information, since
                   the latter might activate resolver(3) library routines.

                   If no address is specified, the netmask, broadcast_addr,
                   dest, and dest_addr options are invalid and will be ig-
                   nored.
           netmask
                   The optional network mask for the interface, e.g.,
                   255.255.255.0. If addr is specified but netmask is not, the
                   classful mask based on addr is used.

           broadcast_addr
                   The optional broadcast address for the interface, e.g.,
                   190.191.192.255. The word "NONE" can also be specified in
                   order to configure the broadcast address based on the
                   netmask. The netmask option must be present in order to use
                   this option.

           options
                   Miscellaneous options to set on the interface, e.g., "media
                   100baseTX mediaopt full-duplex". Valid options for a par-
                   ticular interface type can be found in ifconfig(8). When
                   used, the netmask and broadcast_addr options must also be
                   present.

           dest    If the interface needs a destination address set, this is
                   the literal text "dest". As shown in the example, this de-
                   claration should start on a separate line.

           dest_addr
                   The destination address to be set on the interface, such as
                   190.191.192.2. It is also feasible to use a hostname as
                   specified in /etc/hosts. It is recommended that an address
                   be used instead of symbolic information which might ac-
                   tivate resolver(3) library routines.

           prefixlen
                   The prefixlen number, or number of bits in the netmask, to
                   be set on the interface, such as 64.

           route [+n]
                   This command starts the route(8) command with -n, unless +n
                   is given as second word, and the options as parameters.

           #       Comments are allowed. Anything following a comment charac-
                   ter is treated as a comment.

           !command-line
                   Arbitrary shell commands can be executed using this direc-
                   tive. Useful for doing interface specific configuration us-
                   ing commands like wicontrol(8), setting up custom routes
                   using route(8), or establishing tunnels using ifconfig(8).
                   It is worth noting that "\$if" in a command line will be
                   replaced by the interface name.

DYNAMIC ADDRESS CONFIGURATION

     The following hostname.* formats are valid for configuring network inter-
     faces with dynamic addresses:

     A DHCP-configured network interface setup consists of

           dhcp options

     For example:

           dhcp media 100baseTX mediaopt full-duplex

     The above format has the following field values:

           dhcp    The literal string "dhcp" if the interface is to be config-
                   ured using DHCP. See dhclient(8) and dhclient.conf(5) for
                   more details.

           options
                   Miscellaneous options to set on the interface, e.g., "media
                   100baseTX mediaopt full-duplex". Valid options for a par-
                   ticular interface type can be found in ifconfig(8). The
                   OpenBSD installation script will create hostname.if with
                   options of "NONE NONE NONE" when DHCP configuration is
                   chosen. This is the same as specifying just "dhcp".

     IPv6 stateless address autoconfiguration:

           rtsol options

     The above format has the following field values:

           rtsol   The literal string "rtsol" if the interface is to be con-
                   figured using IPv6 stateless address autoconfiguration.
                   This should be used on single interface hosts only, since
                   the IPv6 specifications are silent about the behavior on
                   multi-interface hosts. Also note that the kernel must be
                   configured to accept IPv6 router advertisement, and config-
                   ured as a host (ie. non-router). Add the following lines
                   into sysctl.conf(5):

                         net.inet6.ip6.forwarding=0
                         net.inet6.ip6.accept_rtadv=1

           options
                   Miscellaneous options to set on the interface, e.g., "media
                   100baseTX mediaopt full-duplex". Valid options for a par-
                   ticular interface type can be found in ifconfig(8).

ADDRESS-LESS CONFIGURATION
     A network interface that does not require an IP address (such as
     bridge(4) member interfaces and interfaces to be used with ppp(8) and
     pppoe(8)) consists of

           state options

     The above format has the following field values:

           state   The administrative state in which to put the interface, ei-
                   ther "up" or "down".

           options
                   Miscellaneous options to set on the interface, e.g., "media
                   100baseTX mediaopt full-duplex". Valid options for a par-
                   ticular interface type can be found in ifconfig(8).

BRIDGE INTERFACE CONFIGURATION

     The final file format only applies to bridgename.bridge* files. A bridge
     interface setup consists of

           brconfig-arguments
           brconfig-arguments
           ...

     For example:

           add fxp0
           add ep1
           -learn fxp0
           #
           !ipsecadm flush
           #
           static fxp0 8:0:20:1e:2f:2b
           up    # and finally enable it

     The options are as follows:

           brconfig-arguments
                   brconfig(8) is called for each successive line. Comments
                   starting with '#' and commands to be executed prefixed by
                   '!' are permitted.

SEE ALSO

     hosts(5), ancontrol(8), brconfig(8), dhcp(8), ifconfig(8), lmccontrol(8),
     netstart(8), rc(8), spppcontrol(8), wicontrol(8)

CAVEATS

     The file /etc/hostname.local is a shell script, no hostname.if(5) file.

MirOS BSD #10-current         September 2, 1999                              3

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