rarpd(8) System Manager's Manual rarpd(8)NAME
rarpd - Reverse address resolution protocol (RARP) daemon
SYNOPSIS
/usr/sbin/rarpd [interface] [-v] [-n] [-f filename]
OPTIONS
Specifies the system's network interface. Causes rarpd to operate in verbose mode. This option logs details of RARP to syslog. The
instance of a RARP request and its response are also logged. Disables checking of the ethers(4) file. By default, rarpd checks the ethers
file once every ten minutes, and, if the file was modified, rarpd rereads the file. If you specify the -n option rarpd scans the
/etc/ethers file once at startup time. Reads an alternate Ethernet address file.
DESCRIPTION
The rarpd daemon maps the Ethernet address of a machine to the machine's Internet Protocol (IP) address.
When rarpd is invoked, it reads the /etc/ethers file (by default) and waits to process a RARP request. The /etc/ethers file is checked
every ten minutes for any changes. If the file has been modified, rarpd reads it again. You can disable this feature with the -n option.
You can force a scan of the /etc/ethers file by sending the rarpd daemon a SIGHUP signal. See signal(2) for more information on SIGHUP.
The format of the /etc/ethers file is described in ethers(4). You can specify a file other than /etc/ethers with the -f option. The inter-
face is the network interface on which the rarpd daemon should listen. The command netstat -i shows the correct interface or interfaces for
your system. The rarpd daemon uses the first interface it finds, if you do not specify an interface. See the netstat(1) reference page for
more information.
Because the rarpd daemon has been implemented with the Ethernet Packet Filter (see packetfilter(7)), you must configure your kernel with
the packet filter option in order for rarpd to function properly. The packet filter detects RARP broadcast packets and passes them to rarpd
for processing. The filter priority for rarpd is set to 28.
All messages from the rarpd daemon are directed to syslog.
RESTRICTIONS
The rarpd daemon ignores all ARP requests sent encapsulated within a RARP packet. ARP requests are handled directly by the kernel.
The machine for which an IP address is being requested must be present in the server's /etc/hosts file.
ERRORS
If the Packet Filter is not configured in your kernel, the following message is displayed on the console window and logged to syslog: PACK-
ETFILTER is not configured in /vmunix
FILES
Database that maps Ethernet addresses to hostnames
SEE ALSO
Commands: arp(8), ifconfig(8), syslogd(8)
Routines: ethers(3)
Files: ethers(4), hosts(4), packetfilter(7)rarpd(8)
Check Out this Related Man Page
in.rarpd(1M) System Administration Commands in.rarpd(1M)NAME
in.rarpd, rarpd - DARPA Reverse Address Resolution Protocol server
SYNOPSIS
/usr/sbin/in.rarpd [-d] -a
/usr/sbin/in.rarpd [-d] device unit
DESCRIPTION
in.rarpd starts a daemon that responds to Reverse Address Resolution Protocol (RARP) requests. The daemon forks a copy of itself that runs
in background. It must be run as root.
RARP is used by machines at boot time to discover their Internet Protocol (IP) address. The booting machine provides its Ethernet address
in a RARP request message. Using the ethers and hosts databases, in.rarpd maps this Ethernet address into the corresponding IP address
which it returns to the booting machine in an RARP reply message. The booting machine must be listed in both databases for in.rarpd to
locate its IP address. in.rarpd issues no reply when it fails to locate an IP address.
in.rarpd uses the STREAMS-based Data Link Provider Interface (DLPI) message set to communicate directly with the datalink device driver.
OPTIONS
The following options are supported:
-a Get the list of available network interfaces from IP using the SIOCGIFADDR ioctl and start a RARP daemon process on each interface
returned.
-d Print assorted debugging messages while executing.
EXAMPLES
Example 1: Starting An in.rarpd Daemon For Each Network Interface Name Returned From /dev/ip:
The following command starts an in.rarpd for each network interface name returned from /dev/ip:
example# /usr/sbin/in.rarpd -a
Example 2: Starting An in.rarpd Daemon On The Device /dev/le With The Device Instance Number 0
The following command starts one in.rarpd on the device /dev/le with the device instance number 0.
example# /usr/sbin/in.rarpd le 0
FILES
/etc/ethers File or other source, as specified by nsswitch.conf(4).
/etc/hosts File or other source, as specified by nsswitch.conf(4).
/tftpboot
/dev/ip
/dev/arp
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWbsu |
+-----------------------------+-----------------------------+
SEE ALSO svcs(1), boot(1M), ifconfig(1M), svcadm(1M), ethers(4), hosts(4), netconfig(4), nsswitch.conf(4),attributes(5), smf(5), dlpi(7P)
Finlayson, R., Mann, T., Mogul, J., and Theimer, M., RFC 903, A Reverse Address Resolution Protocol, Network Information Center, SRI Inter-
national, June 1984.
NOTES
The in.rarpd service is managed by the service management facility, smf(5), under the service identifier:
svc:/network/rarp
Administrative actions on this service, such as enabling, disabling, or requesting restart, can be performed using svcadm(1M). The ser-
vice's status can be queried using the svcs(1) command.
SunOS 5.10 20 Aug 2004 in.rarpd(1M)