Users Guide
Configuring Static ARP Entries
ARP dynamically maps the MAC and IP addresses, and while most network host support dynamic
mapping, you can configure an ARP entry (called a static ARP) for the ARP cache.
To configure a static ARP entry, use the following command.
• Configure an IP address and MAC address mapping for an interface.
CONFIGURATION mode
arp ip-address mac-address interface
– ip-address: IP address in dotted decimal format (A.B.C.D).
– mac-address: MAC address in nnnn.nnnn.nnnn format.
– interface: enter the interface type.
* For the Management interface, enter the keyword ManagementEthernet then the slot/port
information. The slot range is from 0 to 1 and the port range is 0.
* For a Port Channel interface, enter the keywords portchannel then a number. The range is
from 1 to 128.
* For a 10-Gigabit Ethernet interface, enter the keyword TenGigabitEthernet then the slot/
port information.
* For a 40-Gigabit Ethernet interface, enter the keyword fortyGigE then the slot/port
information.
* C1048P (port extender) 1 Gigabit Ethernet interfaces use the following command syntax:
interface peGigE pe-id/pe-stack—unit-id/port-number
where pe-id is a port-extender ID number from 0 to 255
pe-stack-unit-id is a PE stack-unit number from 0 to 7
Example of the show arp Command
These entries do not age and can only be removed manually. To remove a static ARP entry, use the no
arp ip-address
command.
To view the static entries in the ARP cache, use the show arp static command in EXEC privilege
mode.
Dell#show arp
Protocol Address Age(min) Hardware Address Interface VLAN CPU
--------------------------------------------------------------------------------
Internet 10.1.2.4 17 08:00:20:b7:bd:32 Ma 1/0 - CP
Dell#
Configuring ARP Inspection Trust
Use the arp-inspection-trust command to specify a port or an interface as trusted so that ARP
frames are not validated against the binding table. By default, this feature is disabled.
• Enable ARP learning via gratuitous ARP.
INTERFACE Mode
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IPv4 Routing