Feature history for dynamic on-demand tunnels

Updated: April 24, 2026

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Details the evolution and key feature updates associated with dynamic on-demand tunnels, highlighting version-specific enhancements and changes.

Table 1. Feature History Table
Feature Name	Release Number	Description
Dynamic On-Demand Tunnels	Cisco IOS XE Catalyst SD-WAN Release 17.3.1a Cisco SD-WAN Release 20.3.1	This feature enables you to configure an inactive state for tunnels between edge devices. This configuration reduces performance demands on devices and decreases network traffic.
Dynamic On-Demand Tunnels with Transport Gateways	Cisco IOS XE Catalyst SD-WAN Release 17.12.1a Cisco Catalyst SD-WAN Manager Release 20.12.1	A transport gateway can serve as the hub between two spoke devices. It provides the backup route that is necessary for spoke-to-spoke on-demand tunnels to operate. Using a transport gateway as the hub simplifies the process of enabling on-demand tunnels. This method does not require any changes to control policy on Cisco SD-WAN Controllers.

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