IPv6 Multicast Routing
IPv6 Multicast Routing (PIMv6) extends multicast capabilities to IPv6 networks,
enabling one-to-many data delivery with PIM Sparse Mode, PIM Source-Specific Mode, and
Multicast Listener Discovery (MLD).
| Where Can I Use This? | What Do I Need? |
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- NGFW
- CN-Series
- Prisma® Access
- Cloud NGFW for AWS (Managed by Panorama®)
- Cloud NGFW for AWS (Managed Natively)
- Cloud NGFW for Azure (Managed by Panorama)
- Cloud NGFW for Azure (Managed Natively)
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IPv6 Multicast Routing (PIMv6) extends multicast capabilities to IPv6 networks, enabling
one-to-many data delivery. This feature introduces Protocol Independent Multicast
version 6 (PIMv6) and Multicast Listener Discovery (MLD) for IPv6 environments,
building upon existing Protocol Independent Multicast (
PIM) functionality.
- No additional license is required. IPv6 Multicast Routing is included with the
Advanced Routing Engine.
- This feature is available only on the Advanced Routing Engine. It is not
available on the Legacy Routing Engine. If your firewall runs on Gen-4 or
earlier hardware with the Legacy Routing Engine, you must migrate to the
Advanced Routing Engine before you can enable this feature. Gen-5 platforms run
the Advanced Routing Engine by default and require no migration.
- IPv6 multicast routing is disabled by default and must be explicitly enabled per
VRF.
IPv6 multicast provides the following benefits:
- Expanded IPv6 Multicast Support—Extend your multicast capabilities to native
IPv6 networks for modern network environments.
- Efficient Data Delivery—Optimize bandwidth utilization and deliver data for
a wide range of IPv6 applications, including video conferencing and data
replication.
- Flexible Deployment Options—Implement both PIM Sparse Mode (PIM-SM) and PIM
Source-Specific Mode (PIM-SSM) to suit your specific multicast traffic patterns and
requirements.
- Streamlined Management—Leverage familiar PIM concepts and seamless
integration with existing infrastructure to simplify the deployment and ongoing
management of IPv6 multicast.
Prerequisites
Before you configure IPv6 Multicast Routing, ensure you meet the following
prerequisites:
- Established IPv6 Network Infrastructure—You must have a fully functional
IPv6 network infrastructure:
- IPv6 Addressing—Configure valid IPv6 addresses on your
interfaces.
- IPv6 Routing—Establish basic IPv6 routing protocols (for
example, OSPFv3 or static IPv6 routes) to ensure end-to-end IPv6
unicast reachability. PIMv6 uses your underlying unicast routing table
for Reverse Path Forwarding (RPF) checks.
- Network Connectivity—Verify active IPv6 connectivity for all
relevant network segments and devices participating in IPv6
multicast.
- duplicate-ip Support Enabled for MLD Interfaces—Enable duplicate-ip
support for your Multicast Listener Discovery (MLD) interfaces. MLD
allows hosts to signal interest in IPv6 multicast groups. Enabling duplicate-ip
support ensures your device correctly processes and responds to ICMPv6/MLD
packets on the interface.
Best Practices
Use these best practices to optimize your IPv6 Multicast Routing deployment:
- MLD Querier Suppression—Configure MLD querier suppression for RFC
compliance. Prioritize the PIM/MLD querier to suppress Data Plane/Neighbor
Discovery (DP/ND) query packets when MLD is enabled on an interface, preventing
non-compliant behavior from simultaneous queriers.
- Scale Limitations and Delay-Sensitive Applications—Be aware of current
scale limitations, especially regarding packet replication and lookup penalties.
This PIMv6 implementation is not suited for highly delay-sensitive applications
such as Audio/RTP. For such applications, consider using Source-Specific
Multicast (SSM) for more efficient data delivery.
- High Availability (HA)—For robust High Availability, configure PIM
Hellos on floating IPs. This is recommended, especially with Equal-Cost
Multi-Path (ECMP) routing, to ensure consistent HA behavior for your IPv6
multicast deployments.
- Improved Debugging Strategies—To simplify troubleshooting and
monitoring, leverage enhanced debugging capabilities through unified CLI views.
These views provide a consolidated perspective of multicast routes, unicast
routes, and PIM states. Implement always-on logging and group-based debugging to
diagnose issues.
