H3C Technologies H3C SR8800 - Manual (Page 167)

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the NDE and each entry stores the flow statistics, which will be later exported to the NetStream server.
When the timer of an entry expires, the NDE exports the summarized data to the NetStream server in a
specific IPv6 NetStream version export format. For more information about flow aging types and
configuration, see “ Configuring IPv6 NetStream flow aging .”
IPv6 NetStream data export
IPv6 NetStream traditional data export
The IPv6 NetStream collects statistics of each flow and, when the entry timer expires, exports the data of
each entry to the NetStream server.
Though the data includes statistics of each flow, this method consumes more bandwidth and CPU, and
requires large cache size. In most cases, not the whole statistics are necessary for analysis.
IPv6 NetStream aggregation data export
The IPv6 NetStream aggregation merges the flow statistics according to the aggregation criteria of an
aggregation mode, and sends the summarized data to the NetStream server. This process is the IPv6
NetStream aggregation data export, which decreases the bandwidth usage compared to traditional
data export.
Six IPv6 NetStream aggregation modes are supported as listed in
Table 5 . In each mode, the system
merges flows into one aggregation flow if the aggregation criteria are of the same value. The six
aggregation modes work independently and can be configured on the same interface.
Table 5 IPv6 NetStream aggregation modes
Aggregation mode Aggregation criteria
AS aggregation
• Source AS number
• Destination AS number
• Inbound interface index
• Outbound interface index
Protocol-port aggregation
• Protocol number
• Source port
• Destination port
Source-prefix aggregation
• Source AS number
• Source address mask length
• Source prefix
• Inbound interface index
Destination-prefix aggregation
• Destination AS number
• Destination address mask length
• Destination prefix
• Outbound interface index