HP 7000 dl Router Series Guide de l'utilisateur télécharger pdf (Page 830)

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SROS Command Line Interface Reference Guide HDLC Command Set

ip mcast-stub downstream

Use the ip mcast-stub downstream command to enable multicast forwarding and IGMP (router mode) on

an interface and place it in multicast stub downstream 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), virtual PPP interfaces (ppp 1), virtual

HDLC interfaces (hdlc 1), virtual Frame Relay 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-stub

helper-address and ip mcast-stub upstream commands. Downstream interfaces connect to segments

with multicast hosts. Multiple interfaces may be configured in downstream mode; however, interfaces

connecting to the multicast network (upstream) should not be configured in downstream mode. Interfaces

configured as downstream should have the lowest IP address of all IGMP-capable routers on the

connected segment in order to be selected as the designated router and ensure proper forwarding.

Usage Examples

The following example enables multicast forwarding and IGMP on the HDLC interface:

(config)#interface hdlc 1

(config-hdlc 1)#ip mcast-stub downstream

1 2 ... 825 826 827 828 829 830 831 832 833 834 835 ... 940 941

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HP 7000 dl Router Series Guide de l'utilisateur Page 830

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