HP MSR2000 series Configuration Manual page 148

Figure 57 L1/L2 LSP format
Major fields of the L1/L2 LSP are as follows:
PDU length—Total length of the PDU in bytes.
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Remaining lifetime—LSP remaining lifetime in seconds.
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LSP ID—Consists of the system ID, the pseudonode ID (one byte) and the LSP fragment number (one
•
byte).
Sequence number—LSP sequence number.
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Checksum—LSP checksum.
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P (Partition Repair)—Partition bit that is only for L2 LSPs; it indicates whether the router supports
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partition repair.
ATT (Attachment)—Attach bit that is generated by a L1/L1 router for L1 LSPs only; it indicates that
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the router generating the LSP is connected to multiple areas.
OL (LSDB Overload)—Indicates that the LSDB is not complete because the router has run out of
•
memory. Other routers will not send packets to the overloaded router, except packets destined to the
networks directly connected to the router. For example, in
Router C through Router B. Once other routers know the OL field of LSPs from Router B is set to 1,
Router A will send packets to Router C via Router D and Router E, but still send to Router B packets
destined to the network directly connected to Router B.
Figure
135
58, Router A forwards packets to