DXS-3600 Series 10GbE Layer 2/3 Switch CLI Reference Guide
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4-3 clear arp cache
This command is used to remove one or all dynamic ARP entries from the ARP cache table.
clear arp-cache [vrf
<string 1-12>
] [
ip-address
] [interface
interface-name
]
Parameters
Default
The default timeout value is 20 minutes.
Command Mode
Global Configuration Mode.
Command Default Level
Level: 8
Usage Guideline
The ARP timeout setting is only applicable to the IP address and the MAC address
mapping that are learned dynamically. The shorter the timeout, the truer the mapping
table saved in the ARP cache, but the more network bandwidth occupied by the
ARP. Hence the advantages and disadvantages should be weighted. Generally it is
not necessary to configure the ARP timeout too shorter unless there is a special
requirement.
Users can verify the settings by entering the
show arp timeout
command.
Example
This example shows how to tonfigure the timeout value, for the dynamic ARP
mapping record, to 120 minutes.
DXS-3600-32S#configure terminal
DXS-3600-32S(config)#arp timeout 120
DXS-3600-32S(config)#
Example
This example shows how to restore the timeout value, for the dynamic ARP mapping
record, to 20 minutes.
DXS-3600-32S(config)#no arp timeout
DXS-3600-32S(config)#
vrf
Specifies the VRF that the IP reside in. If no VRF name is specified, the global
instance will be used.
ip-address
(Optional) Enter the IP address of the dynamic ARP entry here.
interface
interface-name
(Optional) Specifies the interface from which the dynamic ARP entry was learned.
Default
None.
Command Mode
Privileged Mode.
Command Default Level
Level: 8
Usage Guideline
This command can be used to clear the dynamic ARP entries.
Use the
show ip arp
command to view the current state of the ARP cache table.
Example
This example shows how to remove all dynamic ARP entries.
DXS-3600-32S#clear arp-cache
DXS-3600-32S#
Example
This example shows how to remove a dynamic ARP entry with the IP address
1.1.1.1
DXS-3600-32S#clear arp-cache 1.1.1.1
DXS-3600-32S#
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