3Com MSR 30, MSR 50 manual 46

46 ARP CONFIGURATION COMMANDS
arp check enable
Syntax arp check enable
undo arp check enable
View System view
Parameter None
Description Use the arp check enable command to enable ARP entry check, preventing the
device from learning multicast MAC addresses. With this function enabled, the
device cannot learn any ARP entry with a multicast MAC address. Configuring
such a static ARP entry is not allowed either; otherwise, the system prompts error
information.
Use the undo arp check enable command to disable the function, allowing the
device to learn multicast MAC addresses. 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.
By default, ARP entry check is enabled.
Example # Enable ARP entry check.
<Sysname> system-view
[Sysname] arp check enable
arp max-learning-num
Syntax arp max-learning-num number
undo arp max-learning-num
View VLAN interface view
Parameter number: Maximum number of dynamic ARP entries learned on an interface, in the
range of 1 to 4,096. The default value is 1,024.