HP ProCurve Secure Router 7203 dl Advanced Management And Configuration Manual page 527

3. Move to the configuration mode context of the downstream interface.
(See Figure 10-8.)
Syntax: interface <interface ID>
4. Enable IGMP and multicast forwarding.
ProCurve(config-eth 0/1)# ip mcast-stub downstream
5. Enable IGMP proxy to the helper address.
ProCurve(config-eth 0/1)# ip mcast-stub helper-enable
6. If so desired, configure another downstream interface. Repeat steps 3
through 5.
7. Move to the configuration mode context of the upstream interface. (See
Figure 10-8.)
Syntax: interface <interface ID>
8. Enable IGMP proxy and multicast forwarding.
Syntax: ip mcast-stub upstream
Configuring Multicast Support for a Stub Network
Quick Start
10-25