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Configuring ARP suppression
Overview
The ARP suppression feature enables a device to directly answer ARP requests by using ARP
suppression entries. The device generates ARP suppression entries based on dynamic ARP entries
that it learns. This feature is typically configured on the PEs connected to base stations in an MPLS
L2VPN that provides access to an L3VPN network.
You can also configure the ARP suppression push function to push ARP suppression entries at
intervals by broadcasting gratuitous ARP packets.
Figure 8 s
hows a typical application scenario. ARP suppression is enabled on the PE that connects
to the base station. The PE generates ARP suppression entries for the base station, PE-agg 1, and
PE-agg 2, and it directly replies subsequent ARP requests for these devices.
Figure 8 Typical application
Configuration procedure
Step Command Remarks
1. Enter system view.
system-view
N/A
2. Create a cross-connect
group and enter its view.
xconnect-group
group-name
By default, no cross-connect group
exists.
For more information about this
command, see MPLS Command
Reference.
3. Create a cross-connect
and enter its view.
connection
connection-name
By default, no cross-connect exists.
For more information about this
command, see MPLS Command
Reference.
4. Enable ARP
suppression.
arp suppression enable
By default, ARP suppression is
disabled.
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