ARP(1) XR32 REFERENCE MANUAL 19/1/2013
COMMAND
ARP -- Display / Edit the ARP table.
SYNOPSIS
ARP ADD <host> <hwtype> <addr>
ARP CMD [0-255]
ARP DROP <host> <hwtype>
ARP [LIST | FLUSH]
ARP MAXQ [0-32767]
ARP LEARN <port | default> [ON | OFF]
ARP PUBLISH <host> <hwtype> <addr>
ARP <TIMEOUT | WAIT> [secs]
DESCRIPTION
The ARP command is used to display and edit the Address
Resolution Table, which maps IP addresses to hardware ones.
<host> is an IP address in dotted quad form.
<hwtype> is the hardware type, i.e. "ax25" "netrom" or "ether".
<addr> is the hardware address (callsign / ethernet addr).
ARP by itself, lists the table.
ARP ADD is used to add an entry to the table.
ARP CMD specifies the functionality of the ARP command.
ARP DROP is used to delete an entry from the table.
ARP FLUSH flushes temporary entries from the table.
ARP LEARN controls arp learning.
ARP LIST lists the table.
ARP MAXQ limits no. of datagrams queued pending resolution.
ARP PUBLISH adds an ARP proxy entry for a hidden system.
ARP TIMEOUT specifies max life of a dynamic entry (secs).
ARP WAIT specifies how many secs to wait for an ARP reply.
EXAMPLES
ARP ADD 44.131.91.2 ax25 gb7pzt-5 Add ax25 entry
ARP DROP 44.131.91.7 ax25 Delete ax25 entry
ARP PUB 44.131.91.127 ax25 g8pzt Publish 91.127
ARP TIMEOUT 30 Set 30 sec lifetime
ARP LEARN 2 ON Enable learn on port 2
ARP LIST List the table
ARP List the table
MORE INFO
ARP PUBLISH is used when a host is "hidden" on a network which
is only accessible via XR32, and allows XR32 to respond to ARP
requests for the hidden system, by returning its own hardware
address.
The flags for "ARP CMD" are as follows:
1 = Command is available to secure sysops
2 = Command is available to non-secure sysops
4 = Command is available to users
8 = Private addr's visible to secure sysops
16 = Private addr's visible to non-secure sysops
32 = Private addresses visible to all users
The default is 255 (all options enabled).
A "secure sysop" is at the console, or on a private LAN.
A "non-secure sysop" is one accessing via a public RF network.
ARP LEARN controls whether or not XR32 "learns" ARP info from
passing ARP traffic. The default is for learning to be ON, but
it may be enabled/disabled using ARP LEARN DEFAULT [on | off].
Regardless of the default setting, learning can be enabled or
disabled for any port, using ARP LEARN <portnum> [on | off].
if not refreshed, learned entries persist for the interval
specified by TIMEOUT, usually 15 minutes.
ARP FLUSH removes temporary entries, i.e. those pending
resolution. The default lifetime for these entries is specified
by ARP WAIT (default 30 secs).
ARP MAXQ [0-32767] is used to limit the no. of datagrams which
may be queued pending resolution. The default is 100. If the
address fails to resolve, the queued datagrams are dropped.
AVAILABILITY
The LIST subcommand is available to everyone, but the remainder
are sysop-only.
FILES
ARP commands to be executed at boot-up are usually placed in
IPROUTE.SYS, but they may also be used in BOOTCMDS.SYS.
NOTES
In order for this command to have any meaning, the router must
have an IP address and be connected to an IP-capable network.
You cannot add hardware address types for which there is no
compatible interface, e.g. an attempt to add an Ethernet
address on a system with no Ethernet interfaces will fail.
The defaults are as follows:
TIMEOUT 900 secs. WAIT 30 secs, MAXQ 100
ARP(1) END OF DOCUMENT
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