HP 6125XLG R2306-HP 6125XLG Blade Switch Layer 3 - IP Services Configuration G - Page 14

Setting the aging timer for dynamic ARP entries, Enabling dynamic ARP entry check

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The Layer-2 interface can learn an ARP entry only when both its maximum number and the VLAN interface's maximum number are not reached. To set the maximum number of dynamic ARP entries that an interface can learn: Step Command Remarks 1. Enter system view. system-view N/A 2. Enter interface view. interface interface-type interface-number N/A By default, an interface can learn a maximum of 16384 dynamic ARP 3. Set the maximum number of entries. dynamic ARP entries. arp max-learning-num number If the value of the number argument is set to 0, the interface is disabled from learning dynamic ARP entries. Setting the aging timer for dynamic ARP entries Each dynamic ARP entry in the ARP table has a limited lifetime, called aging timer. The aging timer of a dynamic ARP entry is reset each time the dynamic ARP entry is updated. A dynamic ARP entry that is not updated before its aging timer expires is deleted from the ARP table. To set the aging timer for dynamic ARP entries: Step Command 1. Enter system view. system-view 2. Set the aging timer for dynamic ARP entries. arp timer aging aging-time Remarks N/A By default, the aging time for dynamic ARP entries is 20 minutes. Enabling dynamic ARP entry check The dynamic ARP entry check function controls whether the device supports dynamic ARP entries containing multicast MAC addresses. When dynamic ARP entry check is enabled, the device cannot learn dynamic ARP entries containing multicast MAC addresses, and you cannot manually add static ARP entries containing multicast MAC addresses. When dynamic ARP entry check is disabled, the device can learn dynamic ARP entries containing multicast MAC addresses obtained from the ARP packets sourced from a unicast MAC address. You can also manually add static ARP entries containing multicast MAC addresses. To enable dynamic ARP entry check: Step 1. Enter system view. Command system-view Remarks N/A 5

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5
The Layer-2 interface can learn an ARP entry only when both its maximum number and the VLAN
interface's maximum number are not reached.
To set the maximum number of dynamic ARP entries that an interface can learn:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter interface view.
interface
interface-type
interface-number
N/A
3.
Set the maximum number of
dynamic ARP entries.
arp max-learning-num
number
By default, an interface can learn a
maximum of 16384 dynamic ARP
entries.
If the value of the
number
argument is set
to 0, the interface is disabled from
learning dynamic ARP entries.
Setting the aging timer for dynamic ARP entries
Each dynamic ARP entry in the ARP table has a limited lifetime, called aging timer. The aging timer of a
dynamic ARP entry is reset each time the dynamic ARP entry is updated. A dynamic ARP entry that is not
updated before its aging timer expires is deleted from the ARP table.
To set the aging timer for dynamic ARP entries:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Set the aging timer for dynamic ARP
entries.
arp timer aging
aging-time
By default, the aging time for
dynamic ARP entries is 20 minutes.
Enabling dynamic ARP entry check
The dynamic ARP entry check function controls whether the device supports dynamic ARP entries
containing multicast MAC addresses.
When dynamic ARP entry check is enabled, the device cannot learn dynamic ARP entries containing
multicast MAC addresses, and you cannot manually add static ARP entries containing multicast MAC
addresses.
When dynamic ARP entry check is disabled, the device can learn dynamic ARP entries containing
multicast MAC addresses obtained from the ARP packets sourced from a unicast MAC address. You can
also manually add static ARP entries containing multicast MAC addresses.
To enable dynamic ARP entry check:
Step
Command
Remarks
1.
Enter system view.
system-view
N/A