R0106-HP MSR Router Series Layer 3 - IP Services Configuration Guide(V7)

5
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 for the
interface.
arp max-learning-num number
By default:
• On the MSR2000 or MSR3000
routers, an interface can learn a
maximum of 4096 dynamic ARP
entries.
• On the MSR4000 routers, 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 an 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 disables the device from supporting dynamic ARP entries that
contain multicast MAC addresses. 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, ARP entries containing multicast MAC addresses are
supported. 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
2. Enable dynamic ARP entry check.
arp check enable
By default, dynamic ARP entry check is
enabled.