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Fit AP V200R010C00 Command Reference

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arp-proxy inter-sub-vlan-proxy enable

arp-proxy inter-sub-vlan-proxy enable

Function

The arp-proxy inter-sub-vlan-proxy enable command enables inter-VLAN proxy ARP.

The undo arp-proxy inter-sub-vlan-proxy enable command disables inter-VLAN proxy ARP.

By default, inter-VLAN proxy ARP is disabled.

Format

arp-proxy inter-sub-vlan-proxy enable

undo arp-proxy inter-sub-vlan-proxy enable

Parameters

None

Views

VLANIF interface view

Default Level

2: Configuration level

Usage Guidelines

To allow users in different VLANs to communicate at Layer 3, you must enable inter-VLAN proxy ARP on the interface.

After inter-VLAN proxy ARP is enabled and packets are sent from different VLANs but do not have the corresponding ARP entries, ARP packets are replicated in all VLANs on the involved sub-interface. If a lot of VLANs are configured, a large number of ARP packets need to be replicated, causing heavy burden on the peer device and abnormalities (such as high CPU usage and broadcast suppression) on downstream devices. In addition, the local device may fail to send ARP packets in time due to the replication of a large number of packets, which may lead to ARP learning failures. Therefore, do not configure too many VLANs on an interface.

Example

# Enable inter-VLAN proxy ARP on .

<Huawei> system-view
[Huawei] interface vlanif 10
[Huawei-Vlanif10] arp-proxy inter-sub-vlan-proxy enable
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Updated: 2019-07-18

Document ID: EDOC1100064353

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