centos man page for pppoe-discovery

PPPOE-DISCOVERY(8)					      System Manager's Manual						PPPOE-DISCOVERY(8)

NAME
       pppoe-discovery - perform PPPoE discovery

SYNOPSIS
       pppoe-discovery [ options ]
       pppoe-discovery { -V | -h }

DESCRIPTION
       pppoe-discovery	performs the same discovery process as pppoe, but does not initiate a session.	It sends a PADI packet and then prints the
       names of access concentrators in each PADO packet it receives.

OPTIONS
       -I interface
	      The -I option specifies the Ethernet interface to use.  Under Linux, it is typically eth0 or eth1.  The  interface  should  be  "up"
	      before you start pppoe-discovery, but should not be configured to have an IP address.  The default interface is eth0.

       -D file_name
	      The -D option causes every packet to be dumped to the specified file_name.  This is intended for debugging only.

       -U
	      Causes  pppoe-discovery  to use the Host-Uniq tag in its discovery packets.  This lets you run multiple instances of pppoe-discovery
	      and/or pppoe without having their discovery packets interfere with one another.  You must supply this option to all  instances  that
	      you intend to run simultaneously.

       -S service_name
	      Specifies  the desired service name.  pppoe-discovery will only accept access concentrators which can provide the specified service.
	      In most cases, you should not specify this option.  Use it only if you know that there are multiple  access  concentrators  or  know
	      that you need a specific service name.

       -C ac_name
	      Specifies the desired access concentrator name.  pppoe-discovery will only accept the specified access concentrator.  In most cases,
	      you should not specify this option.  Use it only if you know that there are multiple access concentrators.  If both the  -S  and	-C
	      options are specified, they must both match.

       -A
	      This option is accepted for compatibility with pppoe, but has no effect.

       -V | -h
	      Either of these options causes pppoe-discovery to print its version number and usage information, then exit.

AUTHORS
       pppoe-discovery was written by Marco d'Itri <md@linux.it>, based on pppoe by David F. Skoll <dfs@roaringpenguin.com>.

SEE ALSO
       pppoe(8), pppoe-sniff(8)

																PPPOE-DISCOVERY(8)