arp collect host enable

Function

The arp collect host enable enables BGP EVPN to collect host information.

The undo arp collect host enable command disables BGP EVPN from collecting host information.

By default, BGP EVPN is disabled from collecting host information.

Format

arp collect host enable

undo arp collect host enable

Parameters

None

Views

VBDIF interface view

Default Level

2: Configuration level

Usage Guidelines

When tenants communicate for the first time, they broadcast ARP request packets to each other. The ARP request packets are broadcasted in the Layer 2 network. To prevent broadcast storms caused by broadcasted ARP request packets, you can enable ARP broadcast suppression on the VXLAN Layer 2 gateway. However, ARP broadcast suppression relies on the host information table (containing the host IP address, MAC address, VTEP address, and VNI ID) on a Layer 3 gateway.

To allow a Layer 2 gateway to obtain the host information table, run this command in the VBDIF interface view to enable BGP EVPN to collect host information.

In VXLAN (BGP EVPN) scenarios, when VXLAN gateways advertise IRB routes to each other, run the arp collect host enable command for host information collection.

Example

# Enable BGP EVPN on VBDIF interface 10 to collect host information.

<HUAWEI> system-view
[HUAWEI] interface vbdif 10
[HUAWEI-Vbdif10] arp collect host enable