H3C Technologies H3C MSR 50 - Manual (Page 227)

Configuring IPv6 NetStream
Overview
Legacy ways to collect traffic statistics, like SNMP and port mirroring, cannot provide precise network
management because of inflexible statistical methods or the high cost of required dedicated servers. This
calls for a new technology to collect traffic statistics.
IPv6 NetStream provides statistics about network traffic flows, and it can be deployed on access,
distribution, and core layers.
IPv6 NetStream implements the following features:
• Accounting and billing—IPv6 NetStream provides fine-gained data about the network usage based
on the resources such as lines, bandwidth, and time periods. The ISPs can use the data for billing
based on time period, bandwidth usage, application usage, and QoS. Enterprise customers can
use this information for department chargeback or for cost allocation.
• Network planning—IPv6 NetStream data provides key information, such as AS traffic information,
for optimizing the network design and planning. This helps maximize the network performance and
reliability while minimizing the network operation cost.
• Network monitoring—Configured on the Internet interface, IPv6 NetStream allows for monitoring
traffic and bandwidth utilization in real time. By using this information, administrators can
understand how the network is used and where the bottleneck is, so that they can better plan the
resource allocation.
• User monitoring and analysis—The IPv6 NetStream data provides detailed information about
network applications and resources. This information helps network administrators efficiently plan
and allocate network resources, which helps ensure network security.
IPv6 NetStream basic concepts
IPv6 flow
IPv6 NetStream is an accounting technology that provides statistics on a per-flow basis. An IPv6 flow is
defined by the following 7-tuple elements: destination address, source IP address, destination port
number, source port number, protocol number, ToS, and inbound or outbound interface. The 7-tuple
elements define a unique flow.
IPv6 NetStream operation
A typical IPv6 NetStream system comprises the following parts:
• NetStream data exporter (NDE)—The NDE analyzes traffic flows that pass through it, collects data
from the target flows, and then exports the data to the NSC. Before exporting data, the NDE might
perform processes on the data, such as aggregation. A device with IPv6 NetStream configured acts
as an NDE.
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