Cisco Cisco IOS Software Release 12.2(27)SBC

To implement the offline label mapping checks in the NetFlow collector, the collector needs to maintain 
a history of label mappings obtained from the MPLS PAL NetFlow packets sent by the RP. If a label is 
deallocated and reallocated, the collector should track both the old and the new MPLS PAL information 
for the label. 

On a rare occasion, the collector might not be able to accurately track how many packets flowed for a 
label that has been deallocated by one application and soon reallocated by another application. 

Label to prefix and application mapping is registered and exported from the router RP. This functionality 
does not occur on the line card. If you want to see the mapping for a particular label on a line card and 
the label of interest is tracked by the MPLS PAL table, then you can do the following:

Enter the show mpls forwarding command on the line card.

Enter the show mpls flow mappings on the RP.

Compare the output of the two commands.

You might find the | include keyword to the commands useful in this case. For example, You could enter 
the show mpls flow mappings | include 777 command to see the information for any label with 
substring 777.

Perform the following tasks to configure the NetFlow MPLS Label Export feature on an LSR. This 
feature provides the label, prefix, application mapping through the MPLS PAL table that collects and 
exports the data to a NetFlow collector.

 (required)

 (optional)

 (optional)

Perform this task to configure the NetFlow MPLS Label Export feature and MPLS PAL table export to 
a NetFlow collector. You can use the information generated for network traffic planning and billing. 

The following task must be completed before MPLS labels are allocated by the router for the MPLS PAL 
table to be exported to a NetFlow collector.

mpls export interval interval