NAME

       cas — Sun Cassini/Cassini+ and National Semiconductor DP83065 Saturn Gigabit Ethernet driver

SYNOPSIS

       To compile this driver into the kernel, place the following lines in your kernel configuration file:

             device miibus
             device cas

       Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5):

             if_cas_load="YES"

DESCRIPTION

       The  cas  driver  provides support for the Sun Cassini/Cassini+ and National Semiconductor DP83065 Saturn
       Gigabit Ethernet controllers found on-board in Sun UltraSPARC machines and as add-on cards.

       All controllers supported by the cas driver have TCP/UDP checksum offload capability for both receive and
       transmit, support for the reception and transmission of extended frames  for  vlan(4)  and  an  interrupt
       coalescing/moderation mechanism as well as a 512-bit multicast hash filter.

       The  cas  driver also supports Jumbo Frames (up to 9022 bytes), which can be configured via the interface
       MTU setting.  Selecting an MTU larger than 1500 bytes with the ifconfig(8) utility configures the adapter
       to receive and transmit Jumbo Frames.

HARDWARE

       The chips supported by the cas driver are:

       •   National Semiconductor DP83065 Saturn Gigabit Ethernet
       •   Sun Cassini Gigabit Ethernet
       •   Sun Cassini+ Gigabit Ethernet

       The following add-on cards are known to work with the cas driver at this time:

       •   Sun GigaSwift Ethernet 1.0 MMF (Cassini Kuheen) (part no. 501-5524)
       •   Sun GigaSwift Ethernet 1.0 UTP (Cassini) (part no. 501-5902)
       •   Sun GigaSwift Ethernet UTP (GCS) (part no. 501-6719)
       •   Sun Quad GigaSwift Ethernet UTP (QGE) (part no. 501-6522)
       •   Sun Quad GigaSwift Ethernet PCI-X (QGE-X) (part no. 501-6738)

NOTES

       On sparc64 the cas driver respects the local-mac-address? system configuration variable which can be  set
       in  the  Open  Firmware  boot  monitor  using the setenv command or by eeprom(8).  If set to “false” (the
       default), the cas driver will use the system's default MAC address for all of its  devices.   If  set  to
       “true”,  the unique MAC address of each interface is used if present rather than the system's default MAC
       address.

       Supported interfaces having their own MAC address include on-board versions on boards equipped with  more
       than one Ethernet interface and all add-on cards.

SEE ALSO

       altq(4), miibus(4), netintro(4), vlan(4), eeprom(8), ifconfig(8)

HISTORY

       The  cas  device  driver appeared in FreeBSD 8.0 and FreeBSD 7.3.  It is named after the cas driver which
       first appeared in OpenBSD 4.1 and supports the same set of controllers but is otherwise unrelated.

AUTHORS

       The cas driver was written by Marius Strobl <marius@FreeBSD.org> based on the gem(4) driver.

Debian                                           March 24, 2012                                           CAS(4)