HP A6600 Configuration Manual page 233

Establishing share-MDT in a PIM-SM network
Figure 67 Share-MDT establishment in a PIM-SM network
PE 1
BGP: 11.1.1.1/24
As shown in 0, PIM-SM is enabled in the network and all the PE devices support VPN instance A. The
process of establishing a share-MDT is as follows:
The public network on PE 1 initiates a join to the public network RP, with the share-group address as
1.
the multicast group address in the join message, and a (*, 239.1.1.1) state entry is created on each
device along the path in the public network. At the same time, PE 2 and PE 3 respectively initiate a
similar join process. Finally, an RPT is established in the MD, with the public network RP as the root
and PE 1, PE 2 and PE 3 as leaves.
The public network on PE 1 registers the multicast source with the public network RP and the public
2.
network RP initiates a join to PE 1. With the BGP interface address as the multicast source address
and the share-group address as the multicast group address, a (11.1.1.1, 239.1.1.1) state entry is
created on each device along the path in the public network. At the same time, PE 2 and PE 3
respectively initiate a similar register process. Finally, three SPTs between the PE devices and the RP
are established in the MD.
In the PIM-SM network, the RPT (namely, the (*, 239.1.1.1) tree) and the three independent SPTs
constitute a share-MDT.
BGP: 11.1.3.1/24
PE 3
RP
P
MD
BGP: 11.1.2.1/24
Share-Group: 239.1.1.1
Public instance BGP peers
RPT (*, 239.1.1.1)
SPT (11.1.1.1, 239.1.1.1)
SPT (11.1.2.1, 239.1.1.1)
SPT (11.1.3.1, 239.1.1.1)
PE 2
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