Brocade Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide (Supporting R05.6.00) - Manual (Page 51)

Multi-Service IronWare Multiprotocol Label Switch (MPLS) Configuration Guide 27
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MPLS Point-to-Multipoint Traffic Engineering
1
Source-to-leaf sub-LSP
The P2MP LSP topology as observed in Figure 10 consists of multiple point-to-point LSPs that
originate from the source device and terminate at a destination device or a leaf. These LSPs are
known as source-to-leaf (S2L) sub-LSPs. These S2L sub-LSPs can either be signaled in individual
Path and Resv messages, or can be combined into a small number of messages.
NOTE
Brocade devices support only one S2L signaling per Path message and reject Path messages if
there are more than one S2L LSPs from other vendor routers.
Figure 12 indicates three S2L sub-LSPs — S2L1, S2L2, and S2L3, in a P2MP tunnel.
FIGURE 12 P2MP S2L sub-LSPs