- play_arrow Overview
- play_arrow Managing Group Membership
- play_arrow Configuring IGMP and MLD
- play_arrow Configuring IGMP Snooping
- IGMP Snooping Overview
- Overview of Multicast Forwarding with IGMP Snooping or MLD Snooping in an EVPN-VXLAN Environment
- Configuring IGMP Snooping on Switches
- Example: Configuring IGMP Snooping on Switches
- Example: Configuring IGMP Snooping on EX Series Switches
- Verifying IGMP Snooping on EX Series Switches
- Changing the IGMP Snooping Group Timeout Value on Switches
- Monitoring IGMP Snooping
- Example: Configuring IGMP Snooping
- Example: Configuring IGMP Snooping on SRX Series Devices
- Configuring Point-to-Multipoint LSP with IGMP Snooping
- play_arrow Configuring MLD Snooping
- Understanding MLD Snooping
- Configuring MLD Snooping on an EX Series Switch VLAN (CLI Procedure)
- Configuring MLD Snooping on a Switch VLAN with ELS Support (CLI Procedure)
- Example: Configuring MLD Snooping on EX Series Switches
- Example: Configuring MLD Snooping on SRX Series Devices
- Configuring MLD Snooping Tracing Operations on EX Series Switches (CLI Procedure)
- Configuring MLD Snooping Tracing Operations on EX Series Switch VLANs (CLI Procedure)
- Example: Configuring MLD Snooping on EX Series Switches
- Example: Configuring MLD Snooping on Switches with ELS Support
- Verifying MLD Snooping on EX Series Switches (CLI Procedure)
- Verifying MLD Snooping on Switches
- play_arrow Configuring Multicast VLAN Registration
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- play_arrow Configuring Protocol Independent Multicast
- play_arrow Understanding PIM
- play_arrow Configuring PIM Basics
- Configuring Different PIM Modes
- Configuring Multiple Instances of PIM
- Changing the PIM Version
- Optimizing the Number of Multicast Flows on QFabric Systems
- Modifying the PIM Hello Interval
- Preserving Multicast Performance by Disabling Response to the ping Utility
- Configuring PIM Trace Options
- Configuring BFD for PIM
- Configuring BFD Authentication for PIM
- play_arrow Routing Content to Densely Clustered Receivers with PIM Dense Mode
- play_arrow Routing Content to Larger, Sparser Groups with PIM Sparse Mode
- Understanding PIM Sparse Mode
- Examples: Configuring PIM Sparse Mode
- Configuring Static RP
- Example: Configuring Anycast RP
- Configuring PIM Bootstrap Router
- Understanding PIM Auto-RP
- Configuring All PIM Anycast Non-RP Routers
- Configuring a PIM Anycast RP Router with MSDP
- Configuring Embedded RP
- Configuring PIM Filtering
- Examples: Configuring PIM RPT and SPT Cutover
- Disabling PIM
- play_arrow Configuring Designated Routers
- play_arrow Receiving Content Directly from the Source with SSM
- Understanding PIM Source-Specific Mode
- Example: Configuring Source-Specific Multicast
- Example: Configuring PIM SSM on a Network
- Example: Configuring an SSM-Only Domain
- Example: Configuring SSM Mapping
- Example: Configuring Source-Specific Multicast Groups with Any-Source Override
- Example: Configuring SSM Maps for Different Groups to Different Sources
- play_arrow Minimizing Routing State Information with Bidirectional PIM
- play_arrow Rapidly Detecting Communication Failures with PIM and the BFD Protocol
- play_arrow Configuring PIM Options
- play_arrow Verifying PIM Configurations
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- play_arrow Configuring Multicast Routing Protocols
- play_arrow Connecting Routing Domains Using MSDP
- play_arrow Handling Session Announcements with SAP and SDP
- play_arrow Facilitating Multicast Delivery Across Unicast-Only Networks with AMT
- play_arrow Routing Content to Densely Clustered Receivers with DVMRP
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- play_arrow General Multicast Options
- play_arrow Bit Index Explicit Replication (BIER)
- play_arrow Prevent Routing Loops with Reverse Path Forwarding
- play_arrow Use Multicast-Only Fast Reroute (MoFRR) to Minimize Packet Loss During Link Failures
- play_arrow Enable Multicast Between Layer 2 and Layer 3 Devices Using Snooping
- play_arrow Configure Multicast Routing Options
- play_arrow Controller-Based BGP Multicast Signaling
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- play_arrow Troubleshooting
- play_arrow Knowledge Base
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- play_arrow Configuration Statements and Operational Commands
ON THIS PAGE
BGP-MVPN SD-WAN Overlay
In existing unicast SD-WAN deployments, the hub and spoke architecture is modified to ensure that the spokes are aware of all the routes. Multicast is overlaid on this existing deployment. No additional configuration is required.
The unicast SD-WAN implementation introduces an additional VRF (yellow) on the hub that allows the traffic to traverse all routes. The yellow VRF only handles export of routes and the existing default VRF (blue) handles only import of routes. These VRFs are internally connected through the LT interface. This configuration allows the hub to advertise routes received from spokes to other spokes as if they originated from the hub itself. Therefore the spokes are aware of specific routes from other spokes.
Unlike unicast, a table jump next hop is not permissible in multicast and the traffic must traverse the extra hop through the LT interface wherever the reachability is through LT. Multicast does not apply advanced policy-based routing and hence will be applicable only in the default VRF instance.
In both the hub and the spoke, the VRF connected to the core can be considered as PE and the VRF connected to the host as CE. The multicast control plane uses the same path as that of unicast, using PIM over the LT interface and MVPN over the core GRE interface to exchange control plane information and update the forwarding routes.
Figure 1 shows the dual VRF configuration.
Spoke-side Configuration
On the spoke, PIM is enabled between the LAN VRF and the corresponding default VRF. The PIM joins traverse the LT interface from the LAN to the default VRF. MVPN is enabled on the default VRF. Source and RP reachability is configured through the LT interface so that the PIM joins are sent through the LT and the traffic follows the same path.
Hub-side Configuration
On the hub, PIM is enabled between the default blue and yellow VRFs. MVPN is also enabled on both, the default blue and yellow VRFs. There is no restriction on the import and export of MVPN routes, because it is exported and imported on both default blue and yellow VRFs. However, the yellow VRF will need to be configured as the MVPN sender site in SPT mode. The RP is configured on the export VRF (yellow) of the hub to ensure that type 5 routes are sent to all spokes to inform them of the active sources.
