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Cache Flow Export

Using UDP as the transport method, the ERX router can export the content of the flow cache as the system removes the entries. You can specify one export destination for each VR.

Each export packet contains a header and flow records. The version 5 header contains the following fields:

Version-Format version
Count-Number of records in this packet
SysUpTime-System up time value when this packet was built
Unix Timestamp-Number of seconds and nanoseconds since 0000 UTC 1970 (Coordinated Universal Time)
Sequence Number-Number of total records sent on this export stream
Engine type-Type of switching engine (line module or route processor)

Note: The J-Flow setting for Engine type is always RP=0.
Engine ID-SRP slot number

If, for any reason, the virtual router is unable to export records to the collector, the unsent records are discarded. However, the virtual router continues to increase the sequence number by one as if it sent the records. Discrepancies between the sequence number and sent records can assist in recognizing discontinuities at the collector end.

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