H3C Technologies H3C SecPath F1000-E - Manual (Page 6)

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NOTE:
•
The setting can take effect only after you save it and restart the system.
• When the maximum number of ARP entries the system supports is set to 4K, all cards can be started.
Configuring the Maximum Number of Dynamic ARP Entries for
an Interface
Follow these steps to set the maximum number of dynamic ARP entries that an interface can learn:
To do… Use the command… Remarks
Enter system view system-view —
Enter Ethernet interface view
interface interface-type
interface-number
—
Set the maximum number of
dynamic ARP entries that an
interface can learn
arp max-learning-num
number
Optional
The default setting depends on the
device model.
If the value of the number argument is set
to 0, the interface is disabled from
learning dynamic ARP entries.
Setting the Aging Time for Dynamic ARP Entries
To keep pace with the network changes, the ARP table is refreshed. Each dynamic ARP entry in the ARP
table has a limited lifetime rather than is always valid. Dynamic ARP entries that are not refreshed before
expiration are deleted from the ARP table. The lifetime is called the aging time. The aging time is reset
each time the dynamic ARP entry is refreshed within the lifetime. You can adjust the aging time for
dynamic ARP entries according to the actual network condition.
Follow these steps to set the aging time for dynamic ARP entries:
To do… Use the command… Remarks
Enter system view system-view —
Set the aging time for dynamic ARP
entries
arp timer aging aging-time
Optional
20 minutes by default.
Enabling the ARP Entry Check
The ARP entry check function disables the device from learning multicast MAC addresses.
With the ARP entry check enabled, the device cannot learn any ARP entry with a multicast MAC address,
and configuring such a static ARP entry is not allowed; otherwise, the system displays error messages.
After the ARP entry check is disabled, the device can learn the ARP entry with a multicast MAC address,
and you can also configure such a static ARP entry on the device.
Follow these steps to enable the ARP entry check: