3com S7906E Instruccion De Instalación

 

1-10 

Figure 1-9 L1/L2 LSP format 

 

 

z 

PDU Length: Total length of the PDU in bytes. 

z 

Remaining Lifetime: LSP remaining lifetime in seconds. 

z 

LSP ID: Consists of the system ID, the pseudonode ID (one byte) and the LSP fragment number 

(one byte). 

z 

Sequence Number: LSP sequence number. 

z 

Checksum: LSP checksum. 

z 

P (Partition Repair): Only for L2 LSPs. It indicates whether the router supports partition repair. 

z 

ATT (Attachment): Generated by a L1/L1 router for L1 LSPs only. It indicates that the router 

generating the LSP is connected to multiple areas. 

z 

OL (LSDB Overload): Indicates that the LSDB is not complete because the router runs out of 

memory. In this case, other routers will not send packets to the overloaded router, except packets 

destined to the networks directly connected to the router. For example, in 

forwards packets to 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 1-10 LSDB overload 

 

 

z 

IS Type: Type of the router generating the LSP.