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Configuration Guide - Network Management and Monitoring

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of Network Management and Monitoring, including SNMP, RMON, NETCONF, OpenFlow, LLDP, NQA, Mirroring, Packet Capture, Packet Trace, Path and Connectivity Detection Configuration, NetStream, sFlow, and iPCA.
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NetStream Flow Export

NetStream Flow Export

After aging flows in the NetStream cache, the NDE exports the flow statistics to a specified NSC for further analysis.

Flow Statistics Export Modes

Original flow statistics export

When the flow aging time expires, statistics about each flow are output to the NSC. Under flexible flow statistics export, the NSC can obtain details about each flow.

Aggregation flow statistics export

Under aggregation flow statistics export, the device summarizes the original flows with the same aggregation keywords and obtains statistics on the aggregation flow. The aggregation flow statistics obviously reduce bandwidth occupation. The supported aggregation modes are described in Table 14-2.

For example, there are four original TCP flows that have the same source port number, destination port number, and destination IP address, but different source IP addresses. In this case, the protocol-port mode is used. Aggregation entries in this mode include protocol number, source port number, and destination port number. The four TCP flows have the same protocol number, source port number, and destination port number, so only one aggregation flow statistical record is recorded in the aggregation flow statistics table.

Table 14-2 Aggregation modes

Aggregation Mode

Aggregation Entries

as

Source AS number, destination AS number, index of the inbound interface, and index of the outbound interface

as-tos

Source AS number, destination AS number, inbound interface index, outbound interface index, and ToS

protocol-port

Protocol number, source port number, and destination port number

protocol-port-tos

Protocol number, source port number, destination port number, ToS, inbound interface index, and outbound interface index

source-prefix

Source AS number, source mask length, source prefix, and inbound interface index

source-prefix-tos

Source AS number, source mask length, source prefix, ToS, and inbound interface index

destination-prefix

Destination AS number, destination mask length, destination prefix, and outbound interface index

destination-prefix-tos

Destination AS number, destination mask length, destination prefix, ToS, and outbound interface index

prefix

Source AS number, destination AS number, source mask length, destination mask length, source prefix, destination prefix, inbound interface index, and outbound interface index

prefix-tos

Source AS number, destination AS number, source mask length, destination mask length, source prefix, destination prefix, ToS, inbound interface index, and outbound interface index

bgp-nexthop-tos

BGP next hop, source AS number, destination AS number, inbound interface index, and outbound interface index

index-tos

Inbound interface index, outbound interface index, and ToS

mpls-label (aggregation based on MPLS labels)

Label value of each layer, first label address, stack bottom symbol of each label, and EXP value matching each label

source-index-tos

Inbound interface index, ToS, and BGP next hop

vlan-id

VLAN ID and inbound interface index

Flexible flow statistics export

Flexible flows are created based on customized configurations. Users can collect flow statistics as required, based on the protocol type, ToS priority, source IP address, destination IP address, source port number, destination port number, or flow label. The NDE exports the flow statistics to the NSC. Compared with original flow statistics export, flexible flow statistics export occupies less traffic and provides users with a flexible way to collect NetStream statistics.

When outbound flexible flow sampling is configured on an interface, only the outbound interface information is displayed in the flexible flow statistics. When inbound flexible flow sampling is configured on an interface, only the inbound interface information is displayed in the flexible flow statistics.

Layer 2 NetStream flow statistics export

The device only collects statistics on Layer 2 attributes in packets and sends these statistics to the NSC for analysis.

Versions of Exported Packets

At present, the versions of NetStream exported packets are V5, V8, and V9. NetStream exported packets of all the versions are transmitted using UDP. These packets are explained as follows:
  • V5

    The packet format is fixed. NetStream packets in this format contain the original flow statistics collected based on 7-tuple information.

  • V8

    The packet format is fixed. NetStream packets in this format support the aggregation export format.

  • V9

    The NetStream packet format is defined in profiles. Statistical items can be combined, allowing statistics to be exported more flexibly.

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Updated: 2019-04-20

Document ID: EDOC1100075365

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