R0106-HP MSR Router Series Security Configuration Guide(V7)

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• ip—Checks the sender and target IP addresses of ARP replies, and the sender IP address of ARP
requests. All-one or multicast IP addresses are considered invalid and the corresponding packets
are discarded.
To configure ARP packet validity check:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter VLAN view.
vlan vlan-id N/A
3. Enable ARP detection.
arp detection enable By default, ARP detection is disabled.
4. Return to system view.
quit N/A
5. Enable ARP packet validity check
and specify the objects to be
checked.
arp detection validate
{ dst-mac | ip | src-mac }
*
By default, ARP packet validity check
is disabled.
6. Enter Layer 2 Ethernet interface view.
interface interface-type
interface-number
N/A
7. (Optional.) Configure the interface
as a trusted interface excluded from
ARP detection.
arp detection trust By default, an interface is untrusted.
Configuring ARP restricted forwarding
NOTE:
A
RP restricted forwarding does not apply to ARP packets with multiport MAC as their destination MAC
addresses.
ARP restricted forwarding controls the forwarding of ARP packets that are received on untrusted
interfaces and have passed user validity check as follows:
• If the packets are ARP requests, they are forwarded through the trusted interface.
• If the packets are ARP replies, they are forwarded according to their destination MAC address. If no
match is found in the MAC address table, they are forwarded through the trusted interface.
Configured user validity check before you configure ARP restricted forwarding.
To enable ARP restricted forwarding:
Ste
p
Command Remarks
1. Enter system view.
system-view N/A
2. Enter VLAN view.
vlan vlan-id N/A
3. Enable ARP restricted forwarding.
arp restricted-forwarding enable
By default, ARP restricted
forwarding is disabled.
Displaying and maintaining ARP detection
Execute display commands in any view and reset commands in user view.