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CAS(4)			    Kernel Interfaces Manual			CAS(4)

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  Na-
       tional Semiconductor DP83065 Saturn Gigabit Ethernet controllers.

       All  controllers	 supported by the cas driver have TCP/UDP checksum of-
       fload capability	for both receive and transmit, support for the	recep-
       tion  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)

SEE ALSO
       altq(4),	miibus(4), netintro(4),	vlan(4), 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 sup-
       ports 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.

FreeBSD	14.3			April 18, 2023				CAS(4)

Want to link to this manual page? Use this URL:
<https://man.freebsd.org/cgi/man.cgi?query=cas&sektion=4&manpath=FreeBSD+14.3-RELEASE+and+Ports>

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