3com 3031 Instruccion De Instalación

C

HAPTER

 41: I

NTEGRATED

 IS-IS C

ONFIGURATION

Partial Sequence Number PDU’s serve multiple functions. When an IS-IS router 
receives an LSP, the receiving router will issue a PSNP as acknowledgement. Partial 
Sequence Number PDU’s also aid in maintaining Link State Database 
synchronization by multicasting a PSNP with a list of missing or old LSPs..

A Complete Sequence Number PDU is issued upon startup of the IS-IS service. 
These messages are flooded to neighboring IS-IS peers with the current state of 
the local Link State Database. Each router performs this task in order to provide a 
synchronized Link State Database within the routing doman. Any subsequent 
changes to the database result in a PSNP being transmitted. On a broadcast 
network, CSNP is periodically transmitted by DIS (the default transmission period is 
10 seconds). On a point-to-point line, CSNP is only transmitted when a 
neighboring relationship is initially created.

The commands to configure IS-IS are listed below:

■

Enable IS-IS

■

Configure NET

■

Enable IS-IS on the Specified Interface

■

Configure Metrics Notation of IS-IS Packets

■

Configure IS-IS link State Routing Metrics

■

Configure the Timer of IS-IS

■

Configure the Priority of a Router

■

Configure Interface Circuit Level

■

Configure Interface Authentication Password

■

Configure the Mesh Group of the Interface

■

Configure Router Type

■

Set to Generate the Default Route

■

Configure IS-IS Authentication Password

■

Configure Route Aggregation

■

Configure Overload Flag Bit

■

Configure to Ignore the LSP Checksum Errors

■

Configure to Log the Peer Changes

■

Configure LSP Refresh Interval

■

Configure Lifetime of LSP

■

Set the SPF Calculation Interval

■

Set SPF Fragmented Calculation

■

Set SPF to Release CPU Actively

■

Enable/Disable the Interface to Send Packets

■

Configure IS-IS to Import Routes of Other Protocols

■

Configure IS-IS Route Filtering

■

Configure the Preference of IS-IS Protocol