igb(7D) 							      Devices								   igb(7D)

NAME

       igb - Intel 82575 1Gb PCI Express NIC Driver

SYNOPSIS

       /dev/igb*

DESCRIPTION

       The  igb  Gigabit  Ethernet  driver  is	a  multi-threaded,  loadable, clonable, GLD-based STREAMS driver supporting the Data Link Provider
       Interface, dlpi(7P),  on  Intel 82575 Gigabit Ethernet controllers.

       The igb driver functions include controller  initialization, frame transmit and receive,  promiscuous  and  multicast  support,	and  error
       recovery and reporting.

       The  igb  driver  and  hardware support auto-negotiation, a protocol specified by the 1000  Base-T  standard.  Auto-negotiation allows each
       device to advertise its capabilities and discover those of its peer (link partner). The highest common  denominator   supported	 by   both
       link   partners	 is  automatically  selected,  yielding  the  greatest	available throughput, while requiring no manual configuration. The
       igb driver also allows you to configure the advertised capabilities to less than the maximum (where the full speed  of	the  interface	is
       not required), or to force a specific mode of operation, irrespective of  the  link  partner's  advertised capabilities.

APPLICATION PROGRAMMING INTERFACE

       The cloning character-special device,  /dev/igb, is used to access all  Intel 82575 Gigabit devices installed within the system.

       The  igb  driver is managed  by the dladm(1M) command  line utility, which allows  VLANs to be defined on top of igb instances and  for igb
       instances to be aggregated.  See dladm(1M) for more details.

       You must send an explicit DL_ATTACH_REQ message to associate the opened stream with a particular device (PPA). The PPA ID is interpreted as
       an unsigned integer data type and  indicates the corresponding device instance (unit) number. The driver returns an error (DL_ERROR_ACK) if
       the PPA field value does not correspond to a valid device instance number for the system. The device is initialized on first attach and de-
       initialized (stopped) at last detach.

       The values returned by the driver in the DL_INFO_ACK primitive in response to your DL_INFO_REQ are:

	   o	  Maximum SDU is 9000.

	   o	  Minimum SDU is 0.

	   o	  DLSAP address length is 8.

	   o	  MAC type is DL_ETHER.

	   o	  SAP  (Service  Access  Point) length value is -2, meaning the physical address component is followed immediately by a 2-byte SAP
		  component within the DLSAP address.

	   o	  Broadcast address value is the Ethernet/IEEE broadcast address (FF:FF:FF:FF:FF:FF).

		  Once in the DL_ATTACHED state, you must send a DL_BIND_REQ to associate a particular SAP with the stream.

CONFIGURATION

       By default, the	igb driver performs auto-negotiation to select the link speed and mode. Link speed and mode can be any one of the  follow-
       ing, (as described  in  the IEEE803.2 standard):

       1000 Mbps, full-duplex.

       100 Mbps, full-duplex.

       100 Mbps, half-duplex.

       10 Mbps, full-duplex.

       10 Mbps, half-duplex.

       The auto-negotiation protocol automatically selects speed (1000 Mbps, 100 Mbps, or 10 Mbps) and operation mode (full-duplex or half-duplex)
       as the highest common denominator supported by both link partners.

       Alternatively, you can set the capabilities advertised by the igb device using ndd(1M). The driver supports a number  of  parameters  whose
       names  begin with adv_ (see below). Each of these parameters contains a boolean value that determines if the device advertises that mode of
       operation. For example,	the adv_1000fdx_cap parameter indicates if 1000M full duplex is advertised to link partner. The   adv_autoneg  cap
       parameter  controls  whether  auto-negotiation  is  performed.  If  adv_autoneg_cap  is	set to 0,  the driver forces the mode of operation
       selected by the first  non-zero	parameter in priority order as shown below:

				 (highest priority/greatest throughput)
		 adv_1000fdx_cap	 1000Mbps full duplex
		 adv_100fdx_cap 	 100Mpbs full duplex
		 adv_100hdx_cap 	 100Mbps half duplex
		 adv_10fdx_cap		 10Mpbs full duplex
		 adv_10hdx_cap		 10Mpbs half duplex
					 (lowest priority/least throughput)

       All capabilities default to enabled. Note that changing any capability parameter causes the link to go down while the link partners renego-
       tiate the link speed/duplex using the newly changed capabilities.

FILES

       /dev/igb*		  Special character device.

       /kernel/drv/igb		  32-bit device driver (x86).

       /kernel/drv/amd64/igb	  64-bit device driver (x86).

       /kernel/drv/sparcv9/igb	  64-bit device driver (SPARC).

       /kernel/drv/igb.conf	  Configuration file.

SEE ALSO

       dladm(1M), ndd(1M), netstat(1M), driver.conf(4), attributes(5), streamio(7I), dlpi(7P),

       Writing Device Drivers

       STREAMS Programming Guide

       Network Interfaces Programmer's Guide

SunOS 5.11							    20 Jul 2007 							   igb(7D)