Configuring CSPF Tracing

The chapter describes how and when to configure Multiprotocol Label Switching (MPLS) Constrained Shortest Path First (CSPF) tracing. With each flag that you configure, more granular information about CSPF calculations is provided by the CSPF log file output. (See Table 11.)

Table 11: Checklist for Configuring CSPF Tracing

Configuring CSPF Tracing Tasks	Possible Action or Command
Understanding CSPF
Configuring CSPF Tracing	[edit] edit protocols mpls [edit protocols mpls] set traceoptions file filename set traceoptions flag cspf set traceoptions flag cspf-link set traceoptions flag cspf-node show commit
Examining the CSPF Log File
Trace Only CSPF Computations	[edit protocols mpls] run monitor start filename run show log filename
Trace Nodes Visited During CSPF Computations	[edit protocols mpls] run monitor start filename run show log filename
Trace Links Visited During CSPF Computations	[edit protocols mpls] run monitor start filename run show log filename show ted database