HPE FlexNetwork HSR6800 Configuration Manual page 138

Figure 41 P2P IIH format
Instead of the priority and LAN ID fields in the LAN IIH, the P2P IIH has a Local Circuit ID field.
LSP
The Link State PDUs (LSPs) carry link state information. LSPs include Level-1 LSPs and Level-2
LSP. The Level-2 LSPs are sent by the Level-2 routers, and the Level-1 LSPs are sent by the Level-1
routers. The Level-1-2 router can send both types of LSPs.
The two types of LSPs have the same format, as shown in Figure 42.
Figure 42 L1/L2 LSP format
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