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NE20E-S V800R010C10SPC500 Feature Description - IP Multicast 01

This is NE20E-S V800R010C10SPC500 Feature Description - IP Multicast
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Share-MDT Setup Process

Share-MDT Setup Process

A share-multicast distribution tree (MDT) has a share-group address as the group address and is uniquely identified by a share-group address.

Share-MDT Setup on a PIM-SM Network

Figure 7-6 shows the share-MDT setup process on a public network that runs PIM-SM.

  1. The PIM P-instance on PE 1 sends the rendezvous point (RP) a Join message that carries a share-group address. The RP, that is the P device, receives the Join message and creates the (*, 239.1.1.1) entry. PE 2 and PE 3 also send Join messages to the RP. A rendezvous point tree (RPT) is thus created in the multicast domain (MD), with the RP at the root and PE1, PE2, and PE3 at the leaves.

  2. The PIM P-instance on PE 1 sends the RP a Register message that has the multicast tunnel interface (MTI) address as the source address and the share-group address as the group address. The RP receivers the Register message and creates the (11.11.1.1, 239.1.1.1) entry. PE 2 and PE 3 also send Register messages to the RP. Then, three independent RP-source trees that connect PEs to the RP are built in the MD.

On the PIM-SM network, an RPT (*, 239.1.1.1) and three independent RP-source trees construct a share-MDT.

Figure 7-6 Share-MDT setup on a PIM-SM network

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Updated: 2019-01-03

Document ID: EDOC1100055119

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