5000 Series Layer 2/3 Managed Data Center Switch CLI Reference Guide
631
No
command configures the default ARP cache size.
arp cachesize platform specific integer value
no arp cachesize
Parameters
platform specific integer
value
Indicates the cache size value as an integer.
Default
The default is None.
Command Mode
Global Config
7-3
arp dynamicrenew
Enable the ARP component to automatically renew dynamic ARP entries when timed out. The system
determines whether to retain or delete timed out ARP entries. If the entry was used to forward data
packets, the system renews the entry by sending a neighbor an ARP request. If a response is received,
the age of the entry is reset to 0 without removing the entry from the hardware. Traffic to the host
continues to be forwarded in hardware without interruption. lf the entry is not used to forward data packets,
the entry is deleted from the cache, unless the dynamic renew option is enabled. When dynamic renew is
enabled, the system sends an ARP request to renew the entry. If the entry is not renewed, it is removed
from the hardware and subsequent data packets to the host trigger an ARP request. Traffic to the host
may be lost until the router receives an ARP reply from the host. Gateway entries, entries for a neighbor
router, are always renewed. The dynamic renew option only applies to host entries.
No
command prevents dynamic ARP entries from renewing when they time out.
arp dynamicrenew
no arp dynamicrenew
Parameters
None
Default
The default is Disabled.
Command Mode
Privileged EXEC