Cisco Catalyst SD-WAN AppQoE Configuration Guide, Release 26.x and Later

Feature history for TCP optimization

Updated: March 10, 2026

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Lists the features and enhancements that have been introduced for TCP optimization across different software releases.

Objective

This reference lists the features and enhancements that have been introduced for TCP optimization across different software releases.

Table 1. Feature History
Feature Name	Release Information	Description
TCP Optimization	Cisco IOS XE Catalyst SD-WAN Release 17.3.1a	TCP optimization support extended to Cisco 1000 Series Integrated Services Routers (ISRs) and Cisco 4000 Series Integrated Services Routers (ISRs). See Supported Platforms for more information.
TCP Optimization	Cisco IOS XE Catalyst SD-WAN Release 16.12.1d	This feature optimizes TCP data traffic by decreasing any round-trip latency and improving throughput.

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