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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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Configuring the AS Number Format and Interface Index Length on an IPv4 Network

Configuring the AS Number Format and Interface Index Length on an IPv4 Network

Context

Both the AS number format and interface index length configured on the NDE must be the same as those configured on the NSC. Otherwise, the NSC cannot resolve the NetStream packets sent from the NDE.
  • AS number format: According to RFC recommendations, IP packets carry 16-bit AS numbers. However, in some networks, IP packets carry 32-bit AS numbers. To ensure that the NDE can collect flow statistics between ASs, you may need to configure the AS number format on the NDE.

  • Interface index: The NMS obtains the interface information of exported packets according to the interface indexes in NetStream packets. Interface index formats include 16-bit and 32-bit. The NMS devices of different vendors may use different interface index formats. The interface index format used by the NDE must be the same as the interface index format used by the NMS. For example, if the NMS can parse 32-bit interface indexes, configure the format of the interface indexes contained in exported NetStream packets to 32-bit.

Before configuring the AS number format and interface index length on an IPv4 network, pay attention to the following points:
  • On a network that uses 32-bit AS numbers, the NMS must be able to identify the 32-bit AS numbers; otherwise, the NMS cannot identify inter-AS traffic.
NOTE:

Because the CE6880EI and CE5880EI do not support AS information sampling, they do not support the AS number format.

Procedure

  1. Run the system-view command to enter the system view.
  2. Run the netstream as-mode { 16 | 32 } command to set the AS number format.

    By default, a device uses 16-bit AS numbers.

  3. Run the netstream export ip index-switch index-switch command to set the interface index length in the exported packets carrying IPv4 flow statistics.

    By default, 16-bit interface indexes are contained in the exported packets carrying IPv4 flow statistics. To change the interface index length from 16-bit to 32-bit, ensure that the following requirements are met:
    • The export version of original flows is V9.
    • The export version of all aggregation flows is V9.

  4. Run the commit command to commit the configuration.
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Updated: 2019-04-20

Document ID: EDOC1100075365

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