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ME60 V800R010C10SPC500 Feature Description - IP Multicast 01

This is ME60 V800R010C10SPC500 Feature Description - IP Multicast
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Multicast Program Leave by Going Offline

Multicast Program Leave by Going Offline

AAfter a user goes offline, the IPoE or PPPoE connection is terminated automatically for the user. Figure 10-5 illustrates the process of the multicast program leave by going offline. The key actions during this process are described in Table 10-6.

NOTE:

Session-based multicast replication is used in the following illustration of multicast program leave of all multicast groups by going offline. Multicast program leave of all multicast groups by going offline processes of other multicast replication modes are similar to that of session-based multicast replication.

Figure 10-5 Process of multicast program leave of all multicast groups by going offline
Table 10-6 Key actions in each step of multicast program leave of all multicast groups by going offline

Step

Device

Key Action

STB

When a PPPoE or IPoE STB user goes offline, the user leaves all the multicast programs it joined without sending IGMP Leave messages.

BRAS

The BRAS searches for the multicast programs that the STB user joined and removes all multicast entries of the STB user.

BRAS

The BRAS stops the multicast traffic replication to the STB user.

BRAS

The BRAS stops periodically sending the IGMP Query message to the offline STB user.

BRAS

If the offline STB user was the only member of the multicast program it joined on the BRAS, the BRAS sends a PIM Graft message to the rendezvous point (RP) or the source's designated router (DR). Upon receipt of the message, the multicast source determines that the multicast data of this program is no longer required.

RP/source's DR

The RP or source's DR stops the replication of multicast traffic to the BRAS, and the STB user leaves all the multicast programs it joined.

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Updated: 2019-01-04

Document ID: EDOC1100059456

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