HP 7000 dl Router manual Copyright 2005 Hewlett-Packard Development Company, L.P 794

Command Reference Guide Tunnel Configuration Command Set

ip mcast-stub upstream

Use the ip mcast-stub upstream command to enable multicast forwarding on an interface and place it in multicast stub upstream mode. Use the no form of this command to disable.

Syntax Description

No subcommands.

Default Values

By default, this command is disabled.

Command Modes

(config-interface)#	Interface Configuration Mode
	Valid interfaces include: Ethernet (eth 0/1), PPP virtual interfaces (ppp 1), HDLC
	virtual interfaces (hdlc 1), Frame Relay virtual sub-interfaces (fr 1.20), tunnel
	interfaces (tunnel 1), and VLAN interface (vlan 1).

Functional Notes

This command is used in IP multicast stub applications in conjunction with the ip mcast-stubhelper-addressand ip mcast-stub downstream commands. When enabled, the interface becomes a candidate to be a helper forwarding interface. If chosen as the best path toward the helper address by the router's unicast route table, the IGMP host function is dynamically enabled and the interface becomes the active upstream interface, enabling the router to perform as an IGMP proxy. Though multiple interfaces may be candidates, no more than one interface will actively serve as the helper forwarding interface. Refer to ip mcast-stubhelper-address <ip address> on page 290 and ip mcast-stub downstream on page 791 for more information.

Usage Examples

The following example enables multicast forwarding on the interface:

(config)#interface tunnel 1 (config-tunnel 1)#ip mcast-stub upstream

5991-2114 © Copyright 2005 Hewlett-Packard Development Company, L.P. 794