- play_arrow Overview
- 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
-
- 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
-
- play_arrow Configuring Multicast VPNs
- play_arrow Configuring Draft-Rosen Multicast VPNs
- Draft-Rosen Multicast VPNs Overview
- Example: Configuring Any-Source Draft-Rosen 6 Multicast VPNs
- Example: Configuring a Specific Tunnel for IPv4 Multicast VPN Traffic (Using Draft-Rosen MVPNs)
- Example: Configuring Source-Specific Draft-Rosen 7 Multicast VPNs
- Understanding Data MDTs
- Example: Configuring Data MDTs and Provider Tunnels Operating in Any-Source Multicast Mode
- Example: Configuring Data MDTs and Provider Tunnels Operating in Source-Specific Multicast Mode
- Examples: Configuring Data MDTs
- play_arrow Configuring Next-Generation Multicast VPNs
- Understanding Next-Generation MVPN Network Topology
- Understanding Next-Generation MVPN Concepts and Terminology
- Understanding Next-Generation MVPN Control Plane
- Next-Generation MVPN Data Plane Overview
- Enabling Next-Generation MVPN Services
- Generating Next-Generation MVPN VRF Import and Export Policies Overview
- Multiprotocol BGP MVPNs Overview
- Configuring Multiprotocol BGP Multicast VPNs
- BGP-MVPN Inter-AS Option B Overview
- ACX Support for BGP MVPN
- Example: Configuring MBGP MVPN Extranets
- Understanding Redundant Virtual Tunnel Interfaces in MBGP MVPNs
- Example: Configuring Redundant Virtual Tunnel Interfaces in MBGP MVPNs
- Understanding Sender-Based RPF in a BGP MVPN with RSVP-TE Point-to-Multipoint Provider Tunnels
- Example: Configuring Sender-Based RPF in a BGP MVPN with RSVP-TE Point-to-Multipoint Provider Tunnels
- Example: Configuring Sender-Based RPF in a BGP MVPN with MLDP Point-to-Multipoint Provider Tunnels
- Configuring MBGP MVPN Wildcards
- Distributing C-Multicast Routes Overview
- Exchanging C-Multicast Routes
- Generating Source AS and Route Target Import Communities Overview
- Originating Type 1 Intra-AS Autodiscovery Routes Overview
- Signaling Provider Tunnels and Data Plane Setup
- Anti-spoofing support for MPLS labels in BGP/MPLS IP VPNs (Inter-AS Option B)
- BGP-MVPN SD-WAN Overlay
- play_arrow Configuring PIM Join Load Balancing
- Use Case for PIM Join Load Balancing
- Configuring PIM Join Load Balancing
- PIM Join Load Balancing on Multipath MVPN Routes Overview
- Example: Configuring PIM Join Load Balancing on Draft-Rosen Multicast VPN
- Example: Configuring PIM Join Load Balancing on Next-Generation Multicast VPN
- Example: Configuring PIM Make-Before-Break Join Load Balancing
- Example: Configuring PIM State Limits
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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
-
- play_arrow Configuration Statements and Operational Commands
ON THIS PAGE
Example: Configuring IGMP Snooping on Switches
Internet Group Management Protocol (IGMP) snooping constrains the flooding of IPv4 multicast traffic on VLANs on a device. With IGMP snooping enabled, the device monitors IGMP traffic on the network and uses what it learns to forward multicast traffic to only the downstream interfaces that are connected to interested receivers. The device conserves bandwidth by sending multicast traffic only to interfaces connected to devices that want to receive the traffic, instead of flooding the traffic to all the downstream interfaces in a VLAN.
This example describes how to configure IGMP snooping:
Requirements
This example requires Junos OS Release 11.1 or later on a QFX Series product.
Before you configure IGMP snooping, be sure you have:
Configured the
employee-vlanVLANAssigned interfaces
ge-0/0/1,ge-0/0/2,ge-0/0/3, andge-0/0/4toemployee-vlan
Overview and Topology
In this example you configure an interface to receive multicast traffic from a source and configure some multicast-related behavior for downstream interfaces. The example assumes that IGMP snooping was previously disabled for the VLAN.
By enabling IGMP snooping on a switch, interfaces can be either host-only interfaces or multicast-router interfaces. If the interfaces are not configured explicitly, through IGMP snooping the switch learns which interfaces are host-only and which ones are multicast-router interfaces.
Topology
Table 1 shows the components of the topology for this example.
Components | Settings |
|---|---|
VLAN name |
|
Interfaces in |
|
Multicast IP address for |
|
Configuration
To configure basic IGMP snooping on a switch:
Procedure
CLI Quick Configuration
To quickly configure IGMP snooping, copy the following commands and paste them into a terminal window:
[edit protocols] set igmp-snooping vlan employee-vlan set igmp-snooping vlan employee-vlan interface ge-0/0/3 static group 225.100.100.100 set igmp-snooping vlan employee-vlan interface ge-0/0/2 multicast-router-interface set igmp-snooping vlan employee-vlan robust-count 4
Step-by-Step Procedure
Configure IGMP snooping:
Enable and configure IGMP snooping on the VLAN
employee-vlan:content_copy zoom_out_map[edit protocols] user@switch# set igmp-snooping vlan employee-vlan
Optionally, you can configure an interface to belong to a multicast group. For example, for testing IGMP snooping with Layer 2 multicast forwarding, you might assign an interface to a static multicast group:
content_copy zoom_out_map[edit protocols] user@switch# set igmp-snooping vlan employee-vlan interface ge-0/0/3 static group 225.100.100.100
(See static (IGMP Snooping) for more on how static groups work at Layer 2.)
Configure an interface to forward IGMP queries received from multicast routers.
content_copy zoom_out_map[edit protocols] user@switch# set igmp-snooping vlan employee-vlan interface ge-0/0/2 multicast-router-interface
Configure the switch to wait for four timeout intervals before timing out a multicast group on a VLAN:
content_copy zoom_out_map[edit protocols] user@switch# set igmp-snooping vlan employee-vlan robust-count 4
Results
Check the results of the configuration:
user@switch# show protocols igmp-snooping
vlan employee-vlan {
robust-count 4;
}
interface ge-0/0/2 {
multicast-router-interface;
}
interface ge-0/0/3 {
static {
group 255.100.100.100;
}
}
}
