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IFMEDIA(4)               BSD Kernel Interfaces Manual               IFMEDIA(4)

NAME
     ifmedia -- network interface media settings

SYNOPSIS
     #include <&lt;sys/socket.h>&gt;
     #include <&lt;net/if.h>&gt;
     #include <&lt;net/if_media.h>&gt;

DESCRIPTION
     The ifmedia interface provides a consistent method for querying and set-
     ting network interface media and media options.  The media is typically
     set using the ifconfig(8) command.

     Currently these link types are supported by ifmedia:

           IFM_ETHER      Ethernet
           IFM_FDDI       FDDI
           IFM_IEEE80211  IEEE802.11 Wireless LAN
           IFM_TDM        Time Division Multiplex
           IFM_CARP       CARP

     The following sections describe the possible media settings for each link
     type.  Not all of these are supported by every device; refer to your
     device's manual page for more information.

     The lists below provide the possible names of each media type or option.
     The first name in the list is the canonical name of the media type or
     option.  Additional names are acceptable aliases for the media type or
     option.

COMMON MEDIA TYPES AND OPTIONS
     The following media types are shared by all link types:

           IFM_AUTO    Autoselect the best media.  [autoselect, auto]
           IFM_MANUAL  Jumper or switch on device selects media.  [manual]
           IFM_NONE    Deselect all media.  [none]

     The following media options are shared by all link types:

           IFM_FDX    Place the device into full-duplex mode.  This option
                      only has meaning if the device is normally not full-
                      duplex.

           IFM_HDX    Place the device into half-duplex mode.  This option
                      only has meaning if the device is normally not half-
                      duplex.  [half-duplex, hdx]

           IFM_FLOW   Enable hardware flow control on device.

           IFM_FLAG0  Driver-defined flag.  [flag0]

           IFM_FLAG1  Driver-defined flag.  [flag1]

           IFM_FLAG2  Driver-defined flag.  [flag2]

           IFM_LOOP   Place the device into hardware loopback mode.  [loop-
                      back, hw-loopback, loop]

MEDIA TYPES AND OPTIONS FOR ETHERNET
     The following media types are defined for Ethernet:

           IFM_10_T        10BASE-T, 10Mb/s over unshielded twisted pair, RJ45
                           connector.  [10baseT, UTP, 10UTP]

           IFM_10_2        10BASE2, 10Mb/s over coaxial cable, BNC connector;
                           also called Thinnet.  [10base2, BNC, 10BNC]

           IFM_10_5        10BASE5, 10Mb/s over 15-wire cables, DB15 connec-
                           tor; also called AUI.  [10base5, AUI, 10AUI]

           IFM_10_STP      10BASE-STP, 10Mb/s over shielded twisted pair, DB9
                           connector.  [10baseSTP, STP, 10STP]

           IFM_10_FL       10BASE-FL, 10Mb/s over fiber optic cables.
                           [10baseFL, FL, 10FL]

           IFM_100_TX      100BASE-TX, 100Mb/s over unshielded twisted pair,
                           RJ45 connector.  [100baseTX, 100TX]

           IFM_100_FX      100BASE-FX, 100Mb/s over fiber optic cables.
                           [100baseFX, 100FX]

           IFM_100_T4      100BASE-T4, 100Mb/s over 4-wire (category 3)
                           unshielded twisted pair, RJ45 connector.
                           [100baseT4, 100T4]

           IFM_100_T2      100BASE-T2.  [100baseT2, 100T2]

           IFM_100_VG      100VG-AnyLAN.  [100baseVG, 100VG]

           IFM_1000_SX     1000BASE-SX, 1Gb/s over multi-mode fiber optic
                           cables.  [1000baseSX, 1000SX]

           IFM_1000_LX     1000BASE-LX, 1Gb/s over single-mode fiber optic
                           cables.  [1000baseLX, 1000LX]

           IFM_1000_CX     1000BASE-CX, 1Gb/s over shielded twisted pair.
                           [1000baseCX, 1000CX]

           IFM_1000_T      1000BASE-T, 1Gb/s over category 5 unshielded
                           twisted pair, RJ45 connector.  [1000baseT, 1000T]

           IFM_1000_TX     Compatibility for 1000BASE-T.  [1000baseTX, 1000TX]

           IFM_2500_SX     2500BASE-SX, 2.5Gb/s over multi-mode fiber optic
                           cables.  [2500baseSX, 2500SX]

           IFM_10G_CX4     10GBASE-CX4, 10Gb/s over XAUI 4-lane PCS and copper
                           cables.  [10GbaseCX4, 10GCX4, 10GBASE-CX4]

           IFM_10G_LR      10GBASE-LR, 10Gb/s over single-mode fiber optic
                           cables.  [10GbaseLR, 10GLR, 10GBASE-LR]

           IFM_10G_SFP_CU  10GSFP+Cu, 10Gb/s over SFP+ Direct Attach cables.
                           [10GSFP+Cu, 10GCu]

           IFM_10G_SR      10GBASE-SR, 10Gb/s over multi-mode fiber optic
                           cables.  [10GbaseSR, 10GSR, 10GBASE-SR]

           IFM_10G_T       10GBASE-T, 10Gb/s over unshielded twisted pair,
                           RJ45 connector.  [10GbaseT, 10GT, 10GBASE-T]

           IFM_HPNA_1      HomePNA 1.0, 1Mb/s over 2-wire (category 3)
                           unshielded twisted pair [HomePNA1, HPNA1]

     The following media options are defined for Ethernet:

           IFM_ETH_MASTER   Configure a 1000BASE-T PHY as a MASTER PHY.

           IFM_ETH_RXPAUSE  Receive flow control is enabled on the 1000BASE-T
                            PHY.

           IFM_ETH_TXPAUSE  Transmit flow control is enabled on the 1000BASE-T
                            PHY.

MEDIA TYPES AND OPTIONS FOR FDDI
     The following media types are defined for FDDI:

           IFM_FDDI_SMF  Single-mode fiber.  [Single-mode, SMF]
           IFM_FDDI_MMF  Multi-mode fiber.  [Multi-mode, MMF]
           IFM_FDDI_UTP  Unshielded twisted pair, RJ45 connector.  [UTP, CDDI]

     The following media options are defined for FDDI:

           IFM_FDDI_DA  Dual-attached station vs. Single-attached station.
                        [dual-attach, das]

MEDIA TYPES AND OPTIONS FOR IEEE802.11 WIRELESS LAN
     The following media types are defined for IEEE802.11 Wireless LAN:

           IFM_IEEE80211_FH1     Frequency Hopping 1Mbps.  [FH1]
           IFM_IEEE80211_FH2     Frequency Hopping 2Mbps.  [FH2]
           IFM_IEEE80211_DS1     Direct Sequence 1Mbps.  [DS1]
           IFM_IEEE80211_DS2     Direct Sequence 2Mbps.  [DS2]
           IFM_IEEE80211_DS5     Direct Sequence 5.5Mbps.  [DS5]
           IFM_IEEE80211_DS11    Direct Sequence 11Mbps.  [DS11]
           IFM_IEEE80211_DS22    Direct Sequence 22Mbps.  [DS22]
           IFM_IEEE80211_OFDM6   Orthogonal Frequency Division Multiplexing
                                 (OFDM) 6Mbps.  [OFDM6]
           IFM_IEEE80211_OFDM9   OFDM 9Mbps.  [OFDM9]
           IFM_IEEE80211_OFDM12  OFDM 12Mbps.  [OFDM12]
           IFM_IEEE80211_OFDM18  OFDM 18Mbps.  [OFDM18]
           IFM_IEEE80211_OFDM24  OFDM 24Mbps.  [OFDM24]
           IFM_IEEE80211_OFDM36  OFDM 36Mbps.  [OFDM36]
           IFM_IEEE80211_OFDM48  OFDM 48Mbps.  [OFDM48]
           IFM_IEEE80211_OFDM54  OFDM 54Mbps.  [OFDM54]
           IFM_IEEE80211_OFDM72  OFDM 72Mbps.  [OFDM72]

     The following media options are defined for IEEE802.11 Wireless LAN:

           IFM_IEEE80211_ADHOC       Ad-hoc mode.  [adhoc]
           IFM_IEEE80211_HOSTAP      Host Access Point mode.  [hostap]
           IFM_IEEE80211_IBSS        IBSS mode.  [ibss]
           IFM_IEEE80211_IBSSMASTER  IBSS master mode.  [ibssmaster]
           IFM_IEEE80211_MONITOR     Monitor mode.  [monitor]
           IFM_IEEE80211_TURBO       Turbo mode.  [turbo]

     The following media modes are defined for IEEE802.11 Wireless LAN:

           IFM_IEEE80211_11A  5Ghz, OFDM mode.  [11a]
           IFM_IEEE80211_11B  2GHz, Direct Sequence mode.  [11b]
           IFM_IEEE80211_11G  2GHz, CCK mode.  [11g]
           IFM_IEEE80211_FH   2GHz, GFSK mode.  [fh]

     The channels detailed below are defined for IEEE802.11 Wireless LAN.  The
     list of available frequencies is dependent on radio regulations specified
     by regional authorities.  Recognized regulatory authorities include the
     FCC (United States), ETSI (Europe), France, and Japan.  Frequencies in
     the table are specified in MHz.

           Channel    FCC    ETSI   France   Japan
           1          2412   2412   -        2412
           2          2417   2417   -        2417
           3          2422   2422   -        2422
           4          2427   2427   -        2427
           5          2432   2432   -        2432
           6          2437   2437   -        2437
           7          2442   2442   -        2442
           8          2447   2447   -        2447
           9          2452   2452   -        2452
           10         2457   2457   2457     2457
           11         2462   2462   2462     2462
           12         -      2467   2467     2467
           13         -      2472   2472     2472
           14         -      -      -        2484

     Note that the channels do overlap; the bandwidth required for each chan-
     nel is about 20MHz.  When using multiple channels in close proximity it
     is suggested that channels be separated by at least 25MHz.  In the US,
     this means that only channels 1, 6, and 11 may be used simultaneously
     without interference.

MEDIA TYPES AND OPTIONS FOR TDM
     The following media types are defined for TDM:

           IFM_TDM_E1            E1, 2048kb/s HDB3 encoded, G.703 clearchannel
                                 serial line.  [e1]

           IFM_TDM_E1_AMI        E1, 2048kb/s AMI encoded, G.703 clearchannel
                                 serial line.  [e1-ami]

           IFM_TDM_E1_AMI_G704   E1, 2048kb/s AMI encoded, G.704 structured
                                 serial line.  [e1-ami-g.704]

           IFM_TDM_E1_G704       E1, 2048kb/s HDB3 encoded, G.704 structured
                                 serial line.  [e1-g.704]

           IFM_TDM_E1_G704_CRC4  E1, 2048kb/s HDB3 encoded, G.704 structured
                                 serial line with CRC4 checksum.
                                 [e1-g.704-crc4]

           IFM_TDM_E3            E3, 34368kb/s HDB3 encoded, G.703 clearchan-
                                 nel serial line.  [e3]

           IFM_TDM_E3_G751       E3, 34368kb/s HDB3 encoded, G.751 structured
                                 serial line.  [e3-g.751]

           IFM_TDM_E3_G832       E3, 34368kb/s HDB3 encoded, G.832 structured
                                 serial line.  [e3-g.832]

           IFM_TDM_T1            T1, 1536xkb/s B8ZS encoded, extended super
                                 frame (ESF) structured serial line.  [t1]

           IFM_TDM_T1_AMI        T1, 1536kb/s AMI encoded, super frame (SF)
                                 structured serial line.  [t1-ami]

           IFM_TDM_T3            T3, 44736kb/s B3ZS, C-bit structured serial
                                 line.  [t3]

           IFM_TDM_T3_M13        T3, 44736kb/s B3ZS, M13 structured serial
                                 line.  [t3-m13]

     The following media options are defined for TDM:

           IFM_TDM_HDLC_CRC16  Cisco HDLC with 16-bit CRC checksum encoding.
                               [hdlc-crc16]

           IFM_TDM_FR_ANSI     ANSI/ITU Framerelay encoding.  [framerelay-
                               ansi, framerelay-itu]

           IFM_TDM_FR_CISCO    Cisco Framerelay encoding.  [framerelay-cisco]

           IFM_TDM_PPP         PPP encoding.  [ppp]

     By default TDM interfaces will use Cisco HDLC encoding with a 32-bit CRC
     checksum.

     The following media modes are defined for TDM:

           IFM_TDM_MASTER  Use local clock source as master clock.  [master]

MEDIA TYPES AND OPTIONS FOR CARP
     carp(4) does not support any media types or options.

SEE ALSO
     netintro(4), ifconfig(8)

HISTORY
     The ifmedia interface first appeared in BSD/OS 3.0.  The implementation
     that appeared in NetBSD 1.3 was written by Jonathan Stone and Jason R.
     Thorpe to be compatible with the BSDI API.  It has since gone through
     several revisions which have extended the API while maintaining backwards
     compatibility with the original API.

     Support for the IEEE802.11 Wireless LAN link type was added in
     NetBSD 1.5.

     Host AP mode was added in OpenBSD 3.1.

BSD                            September 3, 2011                           BSD