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arp-l2-validate

Syntax

Hierarchy Level

Description

Enables periodic checking of ARP Layer 3 addressing and MAC Layer 2 addressing tables, and fixes entries if they become out of sync.

Normally, the ARP and MAC address tables stay synchronized. However, you can configure this option on the irb interface of the switch to help avoid traffic loss in network conditions that might cause unresolved inconsistencies to occur between the ARP and MAC address tables, such as:

  • When link flapping occurs in a multichassis link aggregation (MC-LAG) group, and the network is attempting to achieve convergence. In this case, frequent MAC table updates are happening, and occasionally a corresponding ARP table update might be lost.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 13.2R4.