FreeBSD 7.0 manual page repository

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ef - pseudo-device driver providing support for multiple Ethernet frame

 

NAME

      ef - pseudo-device driver providing support for multiple Ethernet frame
      types
 

SYNOPSIS

      device ef
 

DESCRIPTION

      The ef pseudo-device driver clones each Ethernet type device with four
      additional interfaces.  Each of them is capable to send or receive only
      one predefined frame type.
 
      Names for the new interfaces are created by adding a fN suffix to an
      existing device name.  Where N is a device unit which can have one of the
      following values:
 
            0     interface with an Ethernet_II frame
            1     interface with a Novell Ethernet_802.3 frame
            2     interface with an Ethernet_802.2 frame
            3     interface with an Ethernet_802.2/SNAP frame support.
 
      For example, device ed0 will be populated with four devices: ed0f0,
      ed0f1, ed0f2 and ed0f3.
 
      After that, each device can be configured as usual:
            # ifconfig ed0f1 ipx 0x105
      This will configure IPX protocol with network number 0x105 and
      Ethernet_802.3 frame type.
 
      Please note that it is impossible to configure the IPX protocol on the
      parent ed0 device after the if_ef.ko driver has been loaded.
 
      If the parent interface is not configured for any other protocol (IP for
      example), subinterfaces will not function.  To avoid that, the parent
      interface should be manually marked as “up”:
            # ifconfig ed0 up
 

EXAMPLES

      The ef driver can be loaded via the loader.conf(5) file:
            if_ef_load="YES"
 
      In this case, ordinary interface configuration commands can be used in
      the rc.conf(5) file:
            network_interfaces="ed2 lo0 tun0 ed2f0 ed2f1"
            ifconfig_ed2f0_ipx="ipx 0x101"
            ifconfig_ed2f1_ipx="ipx 0x102"
 

DIAGNOSTICS

      None.
 

CAVEATS

      Avoid to configure the parent Ethernet device for the IPX protocol, after
      the ef driver is loaded.
      ipx(3), ifconfig(8)
 

AUTHORS

      Boris Popov 〈bp@FreeBSD.org〉.
 

Sections

Based on BSD UNIX
FreeBSD is an advanced operating system for x86 compatible (including Pentium and Athlon), amd64 compatible (including Opteron, Athlon64, and EM64T), UltraSPARC, IA-64, PC-98 and ARM architectures. It is derived from BSD, the version of UNIX developed at the University of California, Berkeley. It is developed and maintained by a large team of individuals. Additional platforms are in various stages of development.