ECS3510-28T_Management Guide-R05

C HAPTER 44 | IP Interface Commands
IPv4 Interface
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ARP CONFIGURATION This section describes commands used to configure the Address Resolution
Protocol (ARP) on the switch.
arp timeout This command sets the aging time for dynamic entries in the Address
Resolution Protocol (ARP) cache. Use the no form to restore the default
timeout.
SYNTAX
arp timeout seconds
no arp timeout
seconds - The time a dynamic entry remains in the ARP cache.
(Range: 300-86400; 86400 seconds is one day)
DEFAULT SETTING
1200 seconds (20 minutes)
COMMAND MODE
Global Configuration
COMMAND USAGE
◆ When a ARP entry expires, it is deleted from the cache and an ARP
request packet is sent to re-establish the MAC address.
◆ The aging time determines how long dynamic entries remain in the
cache. If the timeout is too short, the switch may tie up resources by
repeating ARP requests for addresses recently flushed from the table.
EXAMPLE
This example sets the ARP cache timeout for 15 minutes (i.e., 900
seconds).
Console(config)#arp timeout 900
Console(config)#
Table 197: Address Resolution Protocol Commands
Command Function Mode
arp timeout Sets the time a dynamic entry remains in the ARP
cache
GC
clear arp-cache Deletes all dynamic entries from the ARP cache PE
show arp Displays entries in the ARP cache NE, PE