Alcatel-Lucent 7750 SR-OS, Configuration Manual

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Page 602 7750 SR OS Router Configuration Guide
When a flow is exported from the cache, the collected data is sent to an external collector which
maintains an accumulation of historical data flows that network operators can use to analyze traffic
patterns.
Data is exported in one of the following formats:
• Version 5 — Generates a fixed export record for each individual flow captured.
• Version 8 — Aggregates multiple individual flows into a fixed aggregate record.
• Version 9 — Generates a variable export record, depending on user configuration and
sampled traffic type (IPv4, IPv6, or MPLS), for each individual flow captured.
• Version 10 (IPFIX) — Generates a variable export record, depending on user
configuration and sampled traffic type (IPv4, IPv6, or MPLS), for each individual flow
captured.
Figure 29 depicts Version 5, Version 8, Version 9, and Version 10 flow processing.
Figure 29: V5, V8, V9, V10, and Flow Processing
1. As flows are expired from the active flow cache, the export format must be determined, either
Version 5, Version 8, Version 9, and Version 10.
2. If the export format is Version 5 or Version 9 and Version 10, no further processing is per-
formed and the flow data is accumulated to be sent to the external collector.
3. If the export format is Version 8, then the flow entry is added to one or more of the configured
aggregation matrices.
DATA AGED
FROM ACTIVE
FLOW CACHE
V5/V8/V9/V10
FORMAT
V8
v5/v9/v10
FORMAT AND
SEND V5 RECORD
TO EXTERNAL
COLLECTOR
ADD ENTRY
V8 AGGREGATE
FLOW CACHE
V8 AGGREGATE
FLOW CACHE
V8 AGGREGATE
FLOW CACHE
AGE AGGREGATE
FLOWS
FORMAT AND
SEND V8 RECORD
TO EXTERNAL
COLLECTOR