Supported Platforms
Related Documentation
- PTX, T Series, QFabric System, QFX Series standalone switches
- Understanding PIM Sparse Mode
Enabling PIM Sparse Mode
In PIM sparse mode (PIM-SM), the assumption is that very few of the possible receivers want packets from a source, so the network establishes and sends packets only on branches that have at least one leaf indicating (by message) a desire for the traffic. WANs are appropriate networks for sparse-mode operation.
By default, PIM is disabled. When you enable PIM, it operates in sparse mode by default. You do not need to configure Internet Group Management Protocol (IGMP) version 2 for a sparse mode configuration. After you enable PIM, by default, IGMP version 2 is also enabled.
All systems on a subnet must run the same version of PIM.
The default PIM version can be version 1 or version 2, depending on the mode you are configuring. PIMv1 is the default for rendezvous point (RP) mode (at the [edit protocols pim rp static address address] hierarchy level). However, PIMv2 is the default for interface mode (at the [edit protocols pim interface interface-name] hierarchy level). Explicitly configured versions override the defaults. The following example explicitly configures PIMv2 on the interfaces.
You can configure PIM sparse mode globally or for a routing instance. This example shows how to configure PIM sparse mode globally on all interfaces. It also shows how to configure a static RP router and how to configure the non-RP routers.
To configure the router properties for PIM sparse mode:
- Configure the static RP router.
- Configure the RP router interfaces. When configuring all interfaces, exclude the fxp0.0 management interface by including the disable statement for that interface.
- Configure the non-RP routers. Include the following configuration on all of the non-RP routers.
- Monitor the operation of PIM sparse mode.
Related Documentation
- PTX, T Series, QFabric System, QFX Series standalone switches
- Understanding PIM Sparse Mode
Published: 2014-07-23
Supported Platforms
Related Documentation
- PTX, T Series, QFabric System, QFX Series standalone switches
- Understanding PIM Sparse Mode
