Skip site navigation (1)Skip section navigation (2)

FreeBSD Man Pages

Man Page or Keyword Search:
Man Architecture
Apropos Keyword Search (all sections) Output format
home | help
EDSC(4)		       FreeBSD Kernel Interfaces Manual		       EDSC(4)

NAME
     edsc -- Ethernet discard network interface

SYNOPSIS
     device edsc

DESCRIPTION
     The edsc interface	is a software discard mechanism	which may be used for
     performance analysis and software testing.	 It imitates an	Ethernet
     device, which allows for its use in conjunction with such drivers as
     if_bridge(4) and vlan(4).

     As	with other network interfaces, an edsc interface must have network
     addresses assigned	for each address family	with which it is to be used.
     These addresses may be set	or changed with	the SIOCSIFADDR	ioctl(2) or
     ifconfig(8) utility.

     Each edsc interface is created at runtime using interface cloning.	 This
     is	most easily done with the ifconfig(8) create command or	using the
     cloned_interfaces variable	in rc.conf(5).

SEE ALSO
     ioctl(2), arp(4), if_bridge(4), inet(4), intro(4),	vlan(4), rc.conf(5),
     arp(8), ifconfig(8)

HISTORY
     The edsc device was derived from the disc(4) device and first appeared in
     FreeBSD 6.3.  This	manpage	was adapted from disc(4).

CAVEATS
     Since outgoing packets are	just discarded by edsc,	ARP requests stay
     unreplied.	 Consequently, an IP packet cannot be sent via edsc until a
     static arp(4) entry is created for	its next hop using arp(8).

     Initially an edsc interface has a zero link level address.	 It can	be
     changed with ifconfig(8) lladdr if	needed.

FreeBSD	9.3			March 25, 2007			   FreeBSD 9.3

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY | CAVEATS

Want to link to this manual page? Use this URL:
<http://www.freebsd.org/cgi/man.cgi?query=edsc&sektion=4&manpath=FreeBSD+7.0-RELEASE>

home | help