Configuring Arp Restricted Forwarding; Displaying And Maintaining Arp Detection; Arp Detection Configuration Example 1 - HP A5830 Series Configuration Manual

Configuring ARP restricted forwarding

ARP restricted forwarding controls the forwarding of ARP packets that are received on untrusted ports
and have passed ARP detection in the following cases:
If the packets are ARP requests, they are forwarded through the trusted ports.
•
If the packets are ARP responses, 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 ports.
Before performing the following steps, make sure that you have configured the arp detection enable
command.
To enable ARP restricted forwarding:
To do...
1. Enter system view.
2. Enter VLAN view.
3. Enable ARP restricted
forwarding.

Displaying and maintaining ARP detection

To do...
Display the VLANs enabled
with ARP detection
Display the ARP detection
statistics
Clear the ARP detection
statistics

ARP detection configuration example 1

Network requirements
As shown in
ARP detection for VLAN 10 to allow only packets from valid clients to pass. Configure Host A and Host
B as local 802.1X access users.
Use the command...
display arp detection [ | { begin | exclude |
include } regular-expression ]
display arp detection statistics [ interface
interface-type interface-number ] [ | { begin |
exclude | include } regular-expression ]
reset arp detection statistics [ interface interface-
type interface-number ]
Figure 75, configure Switch A as a DHCP server and Switch B to support 802.1X. Enable
Use the command...
system-view
vlan vlan-id
arp restricted-forwarding enable
232
Remarks
—
—
Required
Disabled by default
Remarks
Available in any view
Available in any view
Available in user view