3Com S7902E, Руководство по настройке

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1-12
Figure 1-12 L1/L2 PSNP format
Intradomain routing protocol discriminator
Reserved
Version
R
ID length
Version/Protocol ID extension
Length indicator
Maximum area address
R R PDU type
No. of Octets
1
1
1
1
1
1
1
1
PDU length
Source ID
Variable length fields
2
ID 1
CLV
The variable fields of PDU comprise multiple Code-Length-Value (CLV) triplets. Figure 1-13 shows the
CLV format.
Figure 1-13 CLV format
Table 1-2 shows that different PDUs contain different CLVs.
Table 1-2 CLV name and the corresponding PDU type
CLV Code Name PDU Type
1 Area Addresses IIH, LSP
2 IS Neighbors (LSP) LSP
4 Partition Designated Level2 IS L2 LSP
6 IS Neighbors (MAC Address) LAN IIH
7 IS Neighbors (SNPA Address) LAN IIH
8 Padding IIH
9 LSP Entries SNP
10 Authentication Information IIH, LSP, SNP
128 IP Internal Reachability Information LSP
129 Protocols Supported IIH, LSP
130 IP External Reachability Information L2 LSP
131 Inter-Domain Routing Protocol Information L2 LSP