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ARP
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1994-08-10
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arp
Display the Address Resolution Protocol table that maps IP
addresses to their subnet (link) addresses on subnetworks capable of
broadcasting. For each IP address entry the subnet type (e.g.,
AX.25), subnet address and time to expiration is shown. If the link
address is currently unknown, the number of IP datagrams awaiting
resolution is also shown.
arp add <hostid> ether | ax25 | netrom | arcnet
<ether_addr>|<callsign> <iface>
Add a permanent entry to the table. It will not time out as will
an automatically created entry, but must be removed with the 'arp
drop' command.
arp add 44.26.0.19 ax25 wg7j-2 port1
arp drop <hostid> ether | ax25 | netrom | arcnet <iface>
Delete a permanent entry from the arp table.
arp delete 44.26.0.19 ax25 port1
arp eaves [<iface>] [on | OFF]
Display or set the 'arp eavesdrop' function per interface. If
set, all arp replies overheard on the interface will be logged in the
arp table. This speeds up arp discovery, but might build a huge arp
table taking up lots of memory. Default for each interface is off.
# Set arp eavesdrop on interface port1 arp eaves port1 on
arp flush
Drop all automatically-created entries in the ARP table;
permanent entries are not affected.
arp maxq [n]
Display or set the maximum number of packets to be buffered
waiting for an arp resolution to finish. Default = 5.
arp maxq 5
arp poll [<iface>] [on | off]
Display or set the 'arp keepalive polling' per interface. If
set, when an arp entry expires, a query will be sent for the address.
This keeps the arp table fresh, but possibly retains many unneeded
entries.
arp poll port1 on
arp publish <hostid> ax25|netrom <callsign> <iface>
This command is similar to the 'arp add' command, but the system
will also respond to any ARP request it sees on the network that seeks
the specified address. (Use this feature with great care!)
arp publish 44.26.1.19 ax25 wg7j-2 port1
arp sort [ON | off]
Sorts the arp display