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Configuration Guide - Network Management and Monitoring

CloudEngine 12800 and 12800E V200R005C10

This document describes the configurations of Network Management and Monitoring, including SNMP, RMON, LLDP, NQA, Service Diagnosis, Mirroring, Packet Capture, sFlow, and NETCONF.
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Licensing Requirements and Limitations for Discarded Packet Capture

Licensing Requirements and Limitations for Discarded Packet Capture

Involved Network Elements

A collector is used together.

Licensing Requirements

The discarded packet capture function is controlled by a license. By default, this function is disabled on a new switch. To use the discarded packet capture function, apply for and purchase the license from the equipment supplier.

Version Requirements

Table 11-1 Products and minimum version supporting discarded packet capture

Product Model

Minimum Version Required

CE12800E (configured with FD-X series cards installed)


Feature Limitations

  • The switch sends the captured discarded packets to the CPU. The maximum rate for sending discarded packets to the CPU is 1000 pps. Therefore, this function is applicable to networks with a few packets discarded. If a great number of packets are discarded on a network, this function cannot capture all the discarded packets.

  • Only the first 80 bytes of captured discarded packets can be saved and analyzed.
  • If the captured discarded packets are IPv6 packets, the packet statistics cannot be reported through the GRPC interface.
  • For packets discarded due to congestion, the switch can capture only known unicast packets.

  • In a VXLAN scenario, the discarded packet capture function is configured on the device. If congestion occurs on a VXLAN service access interface or VXLAN tunnel interface, the captured packets are discarded. Table 11-2 lists the type of packets captured on the VXLAN service access interface and VXLAN tunnel interface.

    As shown in Figure 11-2, 10GE1/0/2 interfaces on Device1 and Device3 are VXLAN service access interfaces, and 10GE1/0/1 interfaces on Device1 and Device2 are VXLAN tunnel interfaces.

    In the intra-chip scenario, VXLAN service access interfaces and VXLAN tunnel interfaces on the same device are in the same chip. In the inter-chip scenario, VXLAN service access interfaces and VXLAN tunnel interfaces on the same device are in different chips or on different cards.

    Figure 11-2 VXLAN networking
    Table 11-2 Type of packets discarded due to congestion in a VXLAN scenario

    Interface Type

    Intra-chip Scenario

    Inter-chip Scenario

    VXLAN tunnel interface (inbound)

    VXLAN packet

    VXLAN packet

    VXLAN tunnel interface (outbound)

    Original packet (packet that is not encapsulated using VXLAN)

    Original packet (packet that is not encapsulated using VXLAN)

    VXLAN service access interface (inbound)

    Original packet

    Original packet

    VXLAN service access interface (outbound)

    VXLAN packet (packet that is not decapsulated using VXLAN)

    Original packet (VXLAN-decapsulated packet)

Updated: 2019-04-20

Document ID: EDOC1100075344

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