Fabric Multicast

Version:

Location in GUI: Provision » SD-Access » Fabric Sites » Multicast

Diagram

Classes

fabric_sites (catalyst_center.fabric)

Name	Type	Constraint	Mandatory	Default Value
multicast	Class	`[multicast]`	No

multicast (catalyst_center.fabric.fabric_sites)

Name	Type	Constraint	Mandatory	Default Value
virtual_networks	List	`[virtual_networks]`	No

virtual_networks (catalyst_center.fabric.fabric_sites.multicast)

Name	Type	Constraint	Mandatory
name	String		Yes
ip_pool_name	String		Yes
ipv4_ssm_ranges	List	String	No
ipv6_ssm_ranges	List	String	No
multicast_rps	List	`[multicast_rps]`	No

multicast_rps (catalyst_center.fabric.fabric_sites.multicast.virtual_networks)

Name	Type	Constraint	Mandatory
name	String		Yes
rp_location	Choice	`FABRIC`, `EXTERNAL`	Yes
ipv4_address	IP		No
ipv6_address	IP		No
is_default_v4_rp	Boolean	`true`, `false`	No
is_default_v6_rp	Boolean	`true`, `false`	No
fabric_rps	List	String	No
ipv4_asm_ranges	List	String	No
ipv6_asm_ranges	List	String	No

Examples

Example 1: Basic Fabric Multicast with Internal Fabric RP

This example demonstrates the simplest multicast configuration within an SD-Access fabric site using an internal fabric Rendezvous Point (RP). Multicast enables efficient one-to-many communication for applications like video streaming and real-time collaboration.

The multicast configuration includes:

Virtual network specification (Campus) for multicast traffic isolation
IP pool assignment (Multicast-IPPool) for multicast signaling addresses
Internal fabric RP using a border device (BN1.example.com)
Default IPv4 RP configuration for ASM (Any-Source Multicast) with default ranges

catalyst_center:
  fabric:
    fabric_sites:
      - name: Global/Poland/Krakow
        multicast:
          virtual_networks:
            - name: Campus
              ip_pool_name: Multicast-IPPool
              multicast_rps:
                - name: FABRIC_RP_1
                  rp_location: FABRIC
                  is_default_v4_rp: true
                  fabric_rps:
                    - BN1.example.com

Example 2: Fabric Multicast with Dual-Stack RP Support

This example shows how to configure a fabric RP that supports both IPv4 and IPv6 multicast traffic using default ASM ranges for both protocols.

catalyst_center:
  fabric:
    fabric_sites:
      - name: Global/Poland/Krakow
        multicast:
          virtual_networks:
            - name: Campus
              ip_pool_name: Multicast-IPPool1
              multicast_rps:
                - name: FABRIC_RP_1
                  rp_location: FABRIC
                  is_default_v4_rp: true
                  is_default_v6_rp: true
                  fabric_rps:
                    - BN1.example.com

Example 3: Fabric Multicast with SSM and Default ASM Ranges

This example demonstrates combining Source-Specific Multicast (SSM) for optimized delivery with Any-Source Multicast (ASM) using default ranges. SSM is ideal for one-to-many applications where the source is known.

Key configuration details:

SSM range: 232.0.0.0/24 (IPv4 SSM ranges must be within 232.0.0.0/8)
Default ASM ranges are used (no explicit ipv4_asm_ranges specified)
Fabric RP supports both IPv4 and IPv6 default ranges

catalyst_center:
  fabric:
    fabric_sites:
      - name: Global/Poland/Krakow
        multicast:
          virtual_networks:
            - name: Campus
              ip_pool_name: Multicast-IPPool1
              ipv4_ssm_ranges:
                - 232.0.0.0/24
              multicast_rps:
                - name: FABRIC_RP_1
                  rp_location: FABRIC
                  is_default_v4_rp: true
                  is_default_v6_rp: true
                  fabric_rps:
                    - BN1.example.com

Example 4: External RP with Custom ASM Ranges and SSM

This example shows how to configure multicast with an external Rendezvous Point located outside the SD-Access fabric, useful for integrating with existing multicast infrastructure. The configuration includes custom ASM ranges for specific multicast groups.

Important notes:

External RP requires either IPv4 or IPv6 address (not both for a single RP)
Custom ASM range (239.0.0.0/24) for specific multicast groups
Non-default RP configuration (is_default_v4_rp: false) allows multiple RPs with different group ranges
SSM range (232.0.5.0/24) for source-specific multicast traffic

catalyst_center:
  fabric:
    fabric_sites:
      - name: Global/Poland/Krakow
        multicast:
          virtual_networks:
            - name: Campus
              ip_pool_name: Multicast-IPPool1
              ipv4_ssm_ranges:
                - 232.0.5.0/24
              multicast_rps:
                - name: EXTERNAL_RP_1
                  rp_location: EXTERNAL
                  ipv4_address: 10.1.1.100
                  is_default_v4_rp: false
                  ipv4_asm_ranges:
                    - 239.0.0.0/24