VMware SD-WAN Orchestrator supports Address Resolution Protocol (ARP) timeout configuration to allow the user to override the default timeout values of the ARP table entries. VMware SD-WAN Orchestrator allows configuration of three types of timeouts: Stale, Dead, and Cleanup. The default values for the various ARP timeouts are Stale: 2 minutes, Dead: 25 minutes, and Cleanup: 4 hours.
- From the SD-WAN Orchestrator, go to Configure > Profiles.
The Configuration Profiles page appears.
- Select a profile you want to configure L2 settings and click the icon under the Device column.
The Device Settings page for the selected profile appears.
- Go to the L2 Settings area and select the Override default ARP Timeouts checkbox.
- Configure the various ARP timeouts in hours and minutes as follows:
Field Description ARP Stale Timeout
When an ARP’s age exceeds the Stale time, its state changes from ALIVE to REFRESH. At the REFRESH state, when a new packet tries to use this ARP entry, the packet will be forwarded and also a new ARP request will be sent. If the ARP gets resolved, the ARP entry will be moved to the ALIVE state. Otherwise the entry will remain in the REFRESH state and the traffic will be forwarded in this state.The allowable value ranges from 1 minute to 23 hours and 58 minutes.
ARP Dead Timeout
When an ARP’s age exceeds the Dead time, its state changes from REFRESH to DEAD. At the DEAD state, when a new packet tries to use this ARP entry, the packet will be dropped and also an ARP request will be sent. If the ARP gets resolved, the ARP entry will be moved to ALIVE state and the next data packet will be forwarded. If the ARP is not resolved, the ARP entry will remain in the DEAD state. In the DEAD state, traffic will not be forwarded to that port and will be lost.The allowable value ranges from 2 minutes to 23 hours and 59 minutes.
ARP Cleanup Timeout
When an ARP’s age exceeds the Cleanup time, the entry will be completely removed from ARP table.The allowable value ranges from 3 minutes to 24 hours.Note: The ARP timeout values can only be in increasing order of minutes.
- Click Save Changes.
What to do next
At the edge-level, you can override the L2 settings for specific edges. For more information, see Configure Layer 2 Settings for Edges.