Network Appliance(TM)

Manual Pages

Table of Contents

NAME

arp - address resolution display and control

SYNOPSIS

arp hostname

arp -a

arp -d hostname

arp -s hostname ether_address [ temp ] [ pub ]

arp -s hostname pvc iface vpi vci [ aal [ encap [ addr ] ] ]

arp -l pvc iface vpi vci [ aal [ encap ] ]

arp -x iface vpi vci

DESCRIPTION

The arp command displays and modifies the tables that the address resolution protocol uses to translate between Internet and Ethernet addresses.

When an ATM interface is present, arp also displays and modifies the tables that the ATM address resolution protocol uses to translate between Internet addresses and ATM virtual circuits.

With no flags, arp displays the current ARP entry for host_name. The host may be specified by name or by number, using Internet dot notation.

OPTIONS

-a
Displays all of the current ARP entries.

-d
Deletes an entry for the host called hostname.

If the ARP entry for this destination host corresponds to an entry in the ATM arp table, the outgoing virtual circuit to this destination host called hostname is terminated, and the entry is deleted.

-s
Creates an ARP entry for the host called hostname with the Ethernet address ether_address. The Ethernet address is given as six hex bytes separated by colons. The entry will be permanent if the words following -s includes the keyword temp. Temporary entries that consist of a complete Internet address and a matching Ethernet address are flushed from the arp table if they haven't been referenced in the past 20 minutes. A permanent entry is not flushed.

If the words following -s include the keyword pub, the entry will be "published"; i.e., this system will act as an ARP server, responding to requests for hostname even though the host address is not its own.

An alternate format of the arp command's -s option can be used if the words following -s include the keyword pvc. This sets an ATM arp entry for an outgoing permanent virtual circuit (PVC). All traffic for the host called hostname will be sent via the ATM interface iface using VPI vpi, VCI vci, AAL type aal, and will be encapsulated based on encapsulation type encap. If encapsulation is specified as llc_bridged_8023 the argument that follows must be the 6-byte colonseparated destination MAC address.

-l
Attaches the IP layer to an incoming PVC. The words following -l must include the keyword pvc. All traffic received on the ATM interface iface using VPI vpi, VCI vci, AAL type aal and decapsulated based on encapsulation type encap, will be handed over to IP.

-x
Detaches the IP layer from an incoming ATM virtual circuit. IP traffic will no longer be accepted on the specified VPI vpi and VCI vci for the specified interface iface.

NOTES

Data ONTAP does not support trailer encapsulations.

The following restrictions apply when using the arp command to set ATM arp entries for PVCs:

Currently the specified value of vpi must be zero (0) and the specified value of vci must be less than 1024.

The specified value of aal must be one of 4 or 5. If no value is specified, the default value of 5 is selected.

If no encapsulation is specified, the value of null is selected. Encapsulation must be one of:

null (no encapsulation)

llc_routed (IEEE LLC encapsulation for routed PDUs)

llc_bridged_8023 (IEEE LLC encapsulation for Ethernet/802.3 bridged PDUs)

With the arp -s and -l options to set ATM arp entries for PVCs, the following additional procedures are needed:

The remote ATM host needs a complementary ARP setup, (using syntax appropriate to the host software) to set an outgoing and an incoming PVC to and from the filer.

On the interconnecting ATM switch(es), virtual channels must be assigned to the VPI/VCI entries that correspond to the filer's arp -s and arp -l commands.

SEE ALSO

na_ifconfig(1), RFC1483.

Table of Contents