D-Link DWS-1008 User Manual
8
Managing the ARP Table
The Address Resolution Protocol (ARP) table maps IP addresses to MAC addresses. An ARP entry
enters the table in one of the following ways:
• Added automatically by the switch. A switch adds an entry for its own MAC address and adds
entries for addresses learned from traffic received by the switch. When the switch receives an
IP packet, the switch adds the packet’s source MAC address and source IP address to the ARP
table.
• Added by the system administrator. You can add dynamic, static, and permanent entries to the
ARP table.
ARP is enabled by default on a switch and cannot be disabled.
Displaying ARP Table Entries
To display ARP table entries, use the following command:
show arp
[ip-addr]
Here is an example:
DWS-1008#
show arp
ARP aging time: 1200 seconds
Host
HW Address VLAN Type
State
---------------------------------------------------------------------------------------
10.5.4.51
00:0b:0e:02:76:f5 1
DYNAMIC RESOLVED
10.5.4.53
00:0b:0e:02:76:f7 1
LOCAL
RESOLVED
This example shows two entries. The local entry (with LOCAL in the Type field) is for the switch itself.
The MAC address of the local entry is the switch’s MAC address. The ARP table contains one local
entry for each VLAN configured on the switch. The dynamic entry is learned from traffic received by the
switch.
The ARP table can also contain static and permanent entries, which are added by an administrator.
The State field indicates whether an entry is resolved (RESOLVED) or whether MSS has sent an ARP
request for the entry and is waiting for the reply (RESOLVING).
Summary of Contents for DWS-1008
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