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Configuration Guide - Interface Management

CloudEngine 12800 and 12800E V200R003C00

This document describes the interface management configuration, including basic interface configuration, Ethernet interface configuration, and logical interface configuration.

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Licensing Requirements and Limitations for Logical Interfaces

Licensing Requirements and Limitations for Logical Interfaces

Involved Network Elements

No other NEs are required.

Licensing Requirements

An interface is a basic feature of a switch and is not under license control.

Version Requirements

Table 3-2 Minimum version supporting various types of logical interfaces

Interface Type

CE12804/CE12808/CE12812

CE12816

CE12804S/CE12808S

CE12800E

Loopback interface

V100R001C00

V100R003C00

V100R005C00

V200R002C50

Stack interface

For ED-E/EG-E/EGA-E series cards installed: V200R002C50

For FD-X series cards installed: -

NULL interface

V200R002C50

Tunnel interface

VLANIF interface

Eth-Trunk interface

Layer 3 sub-interface

V100R003C10

V100R003C10

Layer 2 sub-interface

V100R005C00

V100R005C00

FCoE interface

NVE interface

VBDIF interface

MTI

V100R005C10

V100R005C10

V100R005C10

-

Feature Limitations

In V200R002C50 and earlier versions, when devices are dual-homed to gateways through M-LAG, the M-LAG master and backup devices are configured with many Layer 2 sub-interfaces, and optical interfaces on the M-LAG master and backup devices are connected to copper transceiver modules, restarting the M-LAG master or backup device may cause packet loss for a long time. In this case, you are advised to manually switch traffic to the other M-LAG device and upgrade and restart the original M-LAG device.

If a large number of Layer 3 subinterfaces are configured on the switch, routing entry specifications of the CE-L36CQ-FG, CE-L36CQ-FD1, CE-L36CQ-SD, CE-L08CF-FG1, and CE-L48XS-FG card will be reduced.

CE12800 series switches running V200R001C00 and later versions support traffic statistics collection on Layer 3 sub-interfaces.

Traffic Statistics Collection on Layer 3 Sub-interfaces
  • After you run the undo statistics enable command on a Layer 3 sub-interface, the switch stops collecting traffic statistics on the Layer 3 sub-interface, and collected traffic statistics will be cleared.

  • If you run the reset interface counters [ interface-type [ interface-number [.subinterface-number ] ] ] command to clear traffic statistics on a physical interface, traffic statistics on corresponding Layer 3 sub-interfaces will not be cleared.

  • For Eth-Trunk Layer 3 sub-interfaces, if member interfaces of the Eth-Trunk are on multiple cards, removing or reinstalling one of these cards does not affect traffic statistics collection on Layer 3 sub-interfaces on the other cards.

  • For the CE12800E equipped with the FD-X series cards, the function of collecting traffic statistics on an Eth-Trunk Layer 3 sub-interface is mutually exclusive to the function of applying a traffic policy in the outbound direction of the QoS group and the function of configuring an ACL-based simplified traffic policy in the outbound direction of the QoS group, and cannot be configured simultaneously.

  • Setting the interval for collecting traffic statistics to be less than 60 seconds using the set flow-stat interval interval-time command affects the traffic statistics collection result. Therefore, the default interval 300 seconds for collecting traffic statistics is recommended.

  • By default, for the CE12800 series switches, traffic statistics collected on Layer 3 sub-interfaces include the inter-frame gap and preamble (20 bytes in total) and statistics on the inter-frame gap and preamble cannot be canceled. For other switches that support traffic statistics collection on Layer 3 sub-interfaces, traffic statistics collected on Layer 3 sub-interfaces do not include the inter-frame gap and preamble, and you can run the qos statistics ifg enable command in the system view to configure the switch to count the inter-frame gap and preamble when the switch collects traffic statistics. If the inter-frame gap of a physical interface is changed using the ifg command in the main interface view, the inter-frame gap of the corresponding Layer 3 sub-interface is not changed, so that traffic statistics collected on the main interface may be different from the summary of traffic statistics collected on the corresponding Layer 3 sub-interfaces.

  • A Layer 3 sub-interface uses ACL resources when collecting traffic statistics. If traffic statistics collection is enabled on too many Layer 3 sub-interfaces, other services may fail to obtain ACL resources. The switch can collect traffic statistics on a maximum of 512 Layer 3 sub-interfaces.

  • [/manual/task/concept/conbody/section/p/ul/li/p/idp:point {""}) (idp:point]Configuring traffic statistics collection in the inbound and outbound directions or in the outbound direction of Layer 3 sub-interfaces[/manual/task/concept/conbody/section/p/ul/li/p/idp:point {""}) (idp:point] on cards may affect the forwarding performance. For example, some packets may be discarded when all interfaces work at the line rate. Therefore, use traffic statistics collection on Layer 3 sub-interfaces when necessary.

  • The switch only supports IPv4 unicast traffic statistics collection on Layer 3 sub-interfaces. IPv4 unicast packets do not contain GRE packets encapsulated in IPv4 headers, 6over4 packets, and VXLAN packets for EVN implementation. Traffic statistics do not contain error packets. When collecting traffic statistics in the outbound direction of Layer 3 sub-interfaces, the switch does not count Layer 3 packets that match ACL rules and are sent to the CPU, as well as packets (such as ping packets) sent from the switch.

  • For the FD, FDA, FD1, FG, FG1, and SD series cards, if the card interoperability mode is non-enhanced, the NVO3 service is configured, and the traffic statistics collection function is enabled on a Layer 3 sub-interface, the restrictions are as follows:
    • If the NVO3 service traffic is forwarded to a VXLAN tunnel in non-loopback mode, the encapsulated VXLAN packets cannot be collected in the outbound traffic statistics of the Layer 3 sub-interface.

    • If NVO3 service traffic is sent out of a VXLAN tunnel, the VXLAN packets are not collected in the inbound traffic statistics of the Layer 3 sub-interface.

    For the FD-X series cards, VXLAN packets cannot be collected in the traffic statistics of the Layer 3 sub-interface.

    For other series of cards, if NVO3 service traffic is sent out of a VXLAN tunnel, the VXLAN packets are not collected in the inbound traffic statistics of the Layer 3 sub-interface.

  • If traffic statistics collection is enabled on an MPLS TE tunnel interface and an MPLS TE-enabled Layer 3 sub-interface, and the switch receives packets with the MPLS TE tunnel interface as the next hop, the switch only collects traffic statistics on the MPLS TE tunnel interface, but not on the Layer 3 sub-interface.

  • The traffic statistics collection priorities on the switch are as follows: MQC > TE tunnel interface > Layer 3 sub-interface. When the traffic meets the statistics collection condition of the three services, the traffic is included in traffic statistics for the service with the highest priority.

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Updated: 2019-05-05

Document ID: EDOC1100004195

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