C
HAPTER
15
| IP Configuration
Address Resolution Protocol
– 442 –
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.
When a ARP entry expires, it is deleted from the cache and an ARP
request packet is sent to re-establish the MAC address.
WEB INTERFACE
To configure the timeout for the ARP cache:
1. Click IP, ARP.
2. Select Configure General from the Step List.
3. Set the timeout to a suitable value for the ARP cache.
4. Click Apply.
Figure 261: Setting the ARP Timeout
DISPLAYING ARP
ENTRIES
Use the IP > ARP (Show Information) page to display dynamic or local
entries in the ARP cache
.
The ARP cache contains entries for local interfaces,
including subnet, host, and broadcast addresses. However, most entries will
be dynamically learned through replies to broadcast
messages.
CLI REFERENCES
â—† "show arp" on page 969
â—† "clear arp-cache" on page 969
WEB INTERFACE
To display all entries in the ARP cache:
1. Click IP, ARP.
2. Select Show Information from the Step List.
Figure 262: Displaying ARP Entries
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