Creating Multicast Vpns; Creating Multicast Vpns Using The Default Mdt; Multicast Vpn Configuration Example - Juniper JUNOSE 11.0.X MULTICAST ROUTING Configuration Manual

Creating Multicast VPNs

JUNOSe router software provides the ability to create multicast VPNs by using GRE
tunnels. This implementation is based on Multicast in MPLS/BGP VPNs
(draft-rosen-vpn-mcast-06.txt and draft-rosen-vpn-mcast-08.txt) and further defined
by Base Specification for Multicast in MPLS/BGP VPNs
(draft-raggarwa-13vpn-2547-mvpn-00.txt).
NOTE: Although you can configure PIM sparse mode remote neighbors, you can no
longer use these remote neighbors for BGP/MPLS VPNs. For multicast VPNs, use the
functionality described in this section.
The JUNOSe software supports default Multicast Distribution Trees (MDTs) and data
MDTs.

Creating Multicast VPNs Using the Default MDT

The JUNOSe software does not support a single MDT command. Instead, you must
configure the multicast tunnel interfaces (MTIs) explicitly. The MTI is an IP interface
that is stacked on a GRE tunnel interface. The destination address of the GRE tunnel
is the multicast VPN (MVPN) group address of the MDT.
A tunnel mdt command specifies that the tunnel is the MTI for the default MDT,
enabling the creation of a second, layer 2 interface (interface tunnel gre:name.mdt)
on which an unnumbered IP interface (tied to the provider edge loopback interface)
is stacked in the context of the parent virtual router.

Multicast VPN Configuration Example

In the following example (Figure 13 on page 96), customer edge router 1 (CE1) and
customer edge router 2 (CE2) exist in two separate VPNs. Each VPN is configured
with its assigned Multicast Domain (235.1.1.1 and 235.1.1.2, respectively).
Specify a value of 0 (default) to configure PIM to switch to an SPT when a source
starts sending multicast messages.
Example
host1(config)#ip pim spt-threshold 4
Use the no version to restore the default value, 0.
See ip pim spt-threshold.
Chapter 3: Configuring PIM for IPv4 Multicast

Creating Multicast VPNs

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