Routing Configuration Guide, Cisco Catalyst SD-WAN Releases 17.x

Feature history for multicast overlay

Updated: February 6, 2026

Overview

This section lists the development milestones and release information for multicast overlay protocol, including feature descriptions.

This table describes the developments of this feature, by release.

Table 1. Feature history
Feature Name	Release Information	Description
Support for multicast overlay routing Protocols	Cisco IOS XE Catalyst SD-WAN Release 17.2.1r	This feature enables efficient distribution of one-to-many traffic. Multicast routing protocols such as IPv4 Multicast, IGMPv3, PIM SSM, PIM ASM, Auto RP, and Static RP distribute data, such as audio or video streaming broadcasts, to multiple recipients. Using multicast overlay protocols, a source can send a single packet of data to a single multicast address, which is then distributed to an entire group of recipients.
Multicast over L3 TLOC extension	Cisco IOS XE Catalyst SD-WAN Release 17.3.2 Cisco SD-WAN Release 20.3.1	This feature enables support for transport location (TLOC), which allows addition of the peer’s transport to avoid the extra cost of additional IP addresses. It also allows dynamic load balancing across multiple transports.
Dynamic rendezvous point (RP) selection by a PIM BSR	Cisco IOS XE Catalyst SD-WAN Release 17.5.1a Cisco SD-WAN Release 20.5.1	This feature adds support for automatic selection of an RP candidate using a PIM BSR in an IPv4 multicast overlay. There is no single point of failure because every site has a local RP. A Cisco IOS XE Catalyst SD-WAN device device is selected as the RP, not a service-side device.
Support for MSDP to interconnect Cisco SD-WAN and non-SD-WAN domains	Cisco IOS XE Catalyst SD-WAN Release 17.11.1a Cisco Catalyst SD-WAN Control Components Release 20.11.1	This feature enables Multicast Source Discovery Protocol (MSDP) interoperability between Cisco IOS XE Catalyst SD-WAN devices in Cisco Catalyst SD-WAN and the devices in a non-SD-WAN setup. Note This feature does not provide support for MSDP peers formed between Cisco IOS XE Catalyst SD-WAN devices in the overlay network.
Multicast support for hub and spoke topologies	Cisco IOS XE Catalyst SD-WAN Release 17.15.1a Cisco Catalyst SD-WAN Manager Release 20.15.1	This feature enables efficient distribution of traffic on edge devices using hub-and-spoke network topology. Multicast routing protocols such as IPv4 Multicast, IGMPv3, PIM SSM, PIM ASM, Auto RP, and Static RP distribute data to multiple recipients.

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