HP 4800G Series Configuration Manual page 518

Figure 1-11 L1/L2 CSNP format
PSNP only contains the sequence numbers of one or multiple latest received LSPs. It can acknowledge
multiple LSPs at one time. When LSDBs are not synchronized, a PSNP is used to request new LSPs
from neighbors.
Figure 1-12 shows the PSNP packet format.
Figure 1-12 L1/L2 PSNP format
Intradomain routing protocol discriminator
Length indicator
Version/Protocol ID extension
ID length
R R R
Version
Reserved
Maximum area address
PDU length
Source ID
Variable length fields
CLV
The variable fields of PDU comprise multiple Code-Length-Value (CLV) triplets.
CLV format.
No. of Octets
1
1
1
1
1
PDU type
1
1
1
2
ID length+1
1-11
Figure 1-13 shows the