Tunneling Multicast Traffic Through The Internet - HP 7102dl - ProCurve Secure Router Configuration Manual

Because the fixed interface is an alternative to a downstream interface, you
should remember to configure these settings before configuring a fixed
interface:
enable multicast routing
specify the helper address
configure the upstream interface
Then, move to the configuration mode context for the interface that you want
to forward the multicast traffic. For example, if you want the Ethernet 0/1
interface to act as a fixed interface, enter:
ProCurve(config)# interface ethernet 0/1
Then, enter this command:
Syntax: ip mcast-stub fixed
Next, configure the interface as a static member of one or more multicast
groups. This allows the interface to receive and forward multicast packets
associated with that group, regardless of whether any receivers join the group
using IGMP.
To make an interface a member of a static multicast group, enter the following
command from the interface configuration mode context:
Syntax: ip igmp static-group <A.B.C.D>
Replace <A.B.C.D> with the IP address of the static multicast group.
The interface has now joined the group. You must now enable it to forward
the join to the multicast helper address. Enter this command from the inter-
face configuration mode context:
Syntax: ip mcast-stub helper-enable

Tunneling Multicast Traffic through the Internet

In a WAN, multicast packets may travel through networks, such as the Inter-
net, that do not support multicasting. In this case, you must establish a tunnel
through which the router can send the multicasts.
The ProCurve Secure Router supports Generic Routing Encapsulation (GRE)
tunneling. When a packet arrives on one tunnel endpoint, the router
encapsulates it with a new IP header, which includes the IP address of the
Configuring Multicast Support for a Stub Network
Configuring IGMP Proxy for Multicast Stub Routing Support
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