Black Box LGB6026A, Management Manual

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C
HAPTER
46 | IP Interface Commands
IPv4 Interface
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.
S
YNTAX
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)
D
EFAULT
S
ETTING
1200 seconds (20 minutes)
C
OMMAND
M
ODE
Global Configuration
C
OMMAND
U
SAGE
◆
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 router may tie up resources by
repeating ARP requests for addresses recently flushed from the table.
E
XAMPLE
This example sets the ARP cache timeout for 15 minutes (i.e., 900
seconds).
Console(config)#arp timeout 900
Console(config)#
ip proxy-arp
This command enables proxy Address Resolution Protocol (ARP). Use the
no form to disable proxy ARP.
S
YNTAX
[ no ] ip proxy-arp
D
EFAULT
S
ETTING
Disabled
C
OMMAND
M
ODE
Interface Configuration (VLAN)
C
OMMAND
U
SAGE
◆
Proxy ARP allows a non-routing device to determine the MAC address of
a host on another subnet or network.