Configuring IP
IP Forwarding
OmniSwitch AOS Release 7 Network Configuration Guide
June 2013
page 15-13
The IP address and hardware address (MAC address) are
required
when you add an entry to the ARP
table. Optionally, you can also specify:
•
Alias.
Use the
alias
keyword to specify that the switch acts as an alias (proxy) for this IP address.
When the alias option is used, the switch responds to all ARP requests for the specified IP address with
its own MAC address. This option is not related to Proxy ARP as defined in RFC 925.
For example:
-> arp 171.11.1.1 00:05:02:c0:7f:11 alias
•
ARP Name
. Use the
arp-name
parameter to specify a name for the permanent ARP entry.
For example:
-> arp 171.11.1.1 00:2a:90:d1:8e:10 arp-name server1
Use the
command to display the ARP table.
Note.
As most hosts support the use of address resolution protocols to determine and cache address
information (called dynamic address resolution), it is not required to specify permanent ARP entries.
Deleting a Permanent Entry from the ARP Table
Permanent entries do not age out of the ARP table. Use the
no arp
command to delete a permanent entry
from the ARP table. When deleting an ARP entry, you only need to enter the IP address. For example, to
delete an entry for IP address 171.11.1.1, you would enter:
-> no arp 171.11.1.1
Use the
show arp
command to display the ARP table and verify that the entry was deleted.
Note.
You can also use the
no arp
command to delete a dynamic entry from the table.
Clearing a Dynamic Entry from the ARP Table
Dynamic entries can be cleared using the
command. This command clears all dynamic
entries. Clear the permanent entries using the
no arp
command.
Use the
show arp
command to display the table and verify that the table was cleared.
Note.
Dynamic entries remain in the ARP table until they time out. If the switch does not receive data
from a host for this user-specified time, the entry is removed from the table. If another packet is received
from this host, the switch goes through the discovery process again to add the entry to the table. The
switch uses the MAC Address table time-out value as the ARP time-out value. Use the