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S12700 V200R012C00 Configuration Guide - Ethernet Switching

This document describes the configuration of Ethernet services, including configuring MAC address table, link aggregation, VLANs, VLAN aggregation, MUX VLAN, VLAN termination, Voice VLAN, VLAN mapping, QinQ, GVRP, VCMP, STP/RSTP/MSTP, VBST, SEP, RRPP, ERPS, LBDT, and Layer 2 protocol transparent transmission.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Licensing Requirements and Limitations for Link Aggregation

Licensing Requirements and Limitations for Link Aggregation

Involved Network Elements

Other network elements are not required.

Licensing Requirements

Ethernet link aggregation is a basic feature of a switch and is not under license control.

Version Requirements

Table 3-4  Products and versions supporting link aggregation

Product

Product Model

Software Version

S12700

S12708, S12712

V200R005C00, V200R006C00, V200R007C00, V200R007C20, V200R008C00, V200R009C00, V200R010C00, V200R011C10, V200R012C00, V200R013C00

S12710

V200R010C00, V200R011C10, V200R012C00, V200R013C00

S12704

V200R008C00, V200R009C00, V200R010C00, V200R011C10, V200R012C00, V200R013C00

NOTE:
For details about software mappings, visit Hardware Query Tool and search for the desired product model.

Feature Dependencies and Limitations

Precautions for configuring an Eth-Trunk
  • Precautions for adding interfaces to an Eth-Trunk

    • If an interface of the local device is added to an Eth-Trunk, an interface of the remote device directly connected to the interface of the local device must also be added to the Eth-Trunk. Otherwise, communication between the two devices will fail.
    • Member interfaces of an Eth-Trunk cannot be an Eth-Trunk.
    • In versions earlier than V200R011C10, only interfaces with the same rate can join an Eth-Trunk. For example, GE electrical interfaces and GE optical interfaces can be added to the same Eth-Trunk interface. In V200R011C10 and later versions, after the mixed-rate link enable command is run, interfaces with different rates can be added to the same Eth-Trunk interface.

      When an Eth-Trunk performs load balancing calculation, the interface rate cannot be used as the calculation weight. When interfaces with different rates are added to the same Eth-Trunk, traffic is evenly load balanced among all the links. Therefore, the bandwidth of member interfaces is calculated by the minimum rate of the member interfaces in the Eth-Trunk. For example, when a GE interface and a 10GE interface are added to the same Eth-Trunk, the rate of the GE interface is used in calculation and the bandwidth of the Eth-Trunk is 2G.

    • Do not configure any member port of an Eth-Trunk as an observing port. If you must do so, ensure that the bandwidth of service traffic on this port and the bandwidth occupied by the mirrored traffic do not exceed the bandwidth limit of the port.

    • An Ethernet interface can be added to only one Eth-Trunk. To add an Ethernet interface to another Eth-Trunk, delete it from the original one first.
    • After an interface is added to an Eth-Trunk, the Eth-Trunk learns MAC address entries or ARP entries, but the member interface does not.
  • Precautions for the networking on which an Eth-Trunk is configured

    • Both devices of the Eth-Trunk must use the same number of physical interfaces, duplex mode, and flow control mode.
    • Both devices of an Eth-Trunk must use the same link aggregation mode.
    • Before deleting an Eth-Trunk, delete member interfaces from the Eth-Trunk.
    • On member interfaces, some commands (for example, port link-type access) and static MAC addresses cannot be configured. Otherwise, errors will be reported.

    • You can run the assign trunk { trunk-group group-number | trunk-member member-number }* command to configure the maximum number of Eth-Trunks and maximum number of member interfaces in each Eth-Trunk only when cards with Eth-Trunk specification extension are installed on the switch. For details about the precautions, see Precautions for extending Eth-Trunk specifications. After the configuration, you can run the display trunk configuration command to check the default specifications of the maximum number of Eth-Trunks that are supported and maximum number of member interfaces in each Eth-Trunk, current specifications, and configured specifications.

    • In V200R008 and earlier versions, the assign trunk command fails to be executed on the device enabled with SVF, and Eth-Trunk specifications can only use the default settings.
Cards are classified into cards with and without Eth-Trunk specification extension, as described in Table 3-5.
Table 3-5  Card series and Eth-Trunk specification extension

Eth-Trunk Specification Extension

Card Series

Extensible

EE series

SC series

X series

ET1D2X48SEC0 in the EC series

Non-extensible

EA series

SA series

EC series (excluding the ET1D2X48SEC0)

Configuration precautions in different scenarios

Scenario Precautions

Switches are connected across a transmission device

  • The switches at both ends must use link aggregation in LACP mode.
  • The transmission device between the switches must be configured to transparently transmit LACPDUs.

Switches connect to transmission devices

The link aggregation mode on the transmission device must be the same as that of the switch. Configure the transmission device according to its operation guide.

A switch connects to a server

  • Network adapters of the server must be of the same type.
  • The link aggregation modes on the server and access device must be consistent.

    For example, if an Intel network adapter is used, a server often uses static or IEEE 802.3ad dynamic link aggregation. When the server uses static link aggregation, the access device must use the manual mode. When the server uses IEEE 802.3ad dynamic link aggregation, the access device must use the LACP mode.

  • When a server needs to obtain the configuration file from the remote file server through a switch and link aggregation needs to be used, run the lacp force-forward command on the Eth-Trunk of the switch.

Switches are connected through inter-card link aggregation

  • Interfaces on different cards of a switch can join the same Eth-Trunk, that is, inter-card Eth-Trunk. Interfaces on cards without Eth-Trunk specification extension can constitute an inter-card Eth-Trunk. Before interfaces on a card with Eth-Trunk specification extension and interfaces on another card constitute an inter-card Eth-Trunk, use the eth-trunk load-balance hash-mode command to configure the hash mode for the card with Eth-Trunk specification extension.
    • If an Eth-Trunk is configured between cards with Eth-Trunk specification extension, the hash mode of the cards must be the same.

    • If an Eth-Trunk is configured between cards with and without Eth-Trunk specification extension, the cards with Eth-Trunk specification extension must work in normal mode.

  • In earlier versions of V200R010C00, only X series cards among cards with Eth-Trunk specification extension support the hash mode configuration. The hash mode on other cards with Eth-Trunk specification extension has a fixed value of advance. In earlier versions of V200R010C00, interfaces on only X series cards among cards with Eth-Trunk specification extension can form Eth-Trunks with interfaces on cards without Eth-Trunk specification extension. Interfaces on other cards with Eth-Trunk specification extension cannot form Eth-Trunks with interfaces on cards without Eth-Trunk specification extension.

    In V200R010C00 and later versions, cards with Eth-Trunk specification extension support the hash mode configuration. When the hash mode on a card with Eth-Trunk specification extension is set to normal, interfaces on the card with Eth-Trunk specification extension can form an Eth-Trunk with interfaces on the card without Eth-Trunk specification extension.

Table 3-5 describes the Eth-Trunk specification extension capability of various card series.

For details about the precautions, see Precautions for configuring an inter-card Eth-Trunk.

Eth-Trunk specifications are extended

Table 3-5 describes the Eth-Trunk specification extension capability of various card series.

For details about the precautions, see Precautions for extending Eth-Trunk specifications.

Precautions for configuring an inter-card Eth-Trunk
  • Upgrade

    After the switch is upgraded from an earlier version of V200R010C00 to V200R010C00 or later, the following situations will occur:

    • If the configuration is not saved before the card is started or installed, the installed SC series, EE series, or ET1D2X48SEC0 card works in advanced mode and the corresponding configuration is generated.

    • If the configuration is saved before the card is started or installed, the installed SC series, EE series, or ET1D2X48SEC0 card works in normal mode.

  • Card replacement

    Table 3-6 lists the hash modes of cards in a slot before and after card replacement.
    Table 3-6  Hash modes of cards in a slot before and after card replacement

    Replaced Card

    Hash Mode of the Replaced Card

    New Card

    Hash Mode of the New Card

    Card with Eth-Trunk specification extension

    advanced

    Card with Eth-Trunk specification extension

    advanced

    Card with Eth-Trunk specification extension

    advanced

    Card without Eth-Trunk specification extension

    N/A

    Card with Eth-Trunk specification extension

    normal

    Card with Eth-Trunk specification extension

    normal

    Card with Eth-Trunk specification extension

    normal

    Card without Eth-Trunk specification extension

    N/A

    Card without Eth-Trunk specification extension

    N/A

    Card with Eth-Trunk specification extension

    normal

  • Card removal

    When the card with Eth-Trunk specification extension in advanced mode is removed, the configuration of the hash mode is reserved in the system. You can run the undo eth-trunk load-balance hash-mode command to clear the configuration of the hash mode.

  • Other

    • When interfaces on the card with Eth-Trunk specification extension form an inter-card Eth-Trunk with interfaces on other cards, the hash mode of the card with Eth-Trunk specification extension cannot be changed. To change the hash mode of the card with Eth-Trunk specification extension, first delete the inter-card Eth-Trunk member interfaces of the card with Eth-Trunk specification extension from the inter-card Eth-Trunk.

    • When interfaces on the SC series, EE series, or ET1D2X48SEC0 card, card without Eth-Trunk specification extension, and X series card working in normal mode form an inter-card Eth-Trunk, first run the unknown-unicast load-balance command to set the load balancing mode of unknown unicast packets to lbid. After the inter-card Eth-Trunk is created, the load balancing mode of unknown unicast packets cannot be changed.

    • If interfaces on the card with Eth-Trunk specification extension in normal mode or card without Eth-Trunk specification extension are added to the same Eth-Trunk with interfaces on the card with Eth-Trunk specification extension in advanced mode, load balancing of the Eth-Trunk is uneven and the alarm IFPDT_1.3.6.1.4.1.2011.5.25.157.2.211 hwNotSameBoardInTrunk is triggered.

Precautions for extending Eth-Trunk specifications
  • Configuration effectiveness

    • When assign trunk command is used to change Eth-Trunk specifications on a switch of V200R003, V200R005, or V200R006, you need to restart the switch to make the configuration take effect.

    • When assign trunk command is used to change Eth-Trunk specifications on a switch of V200R007 or later, you need to save the configuration and restart the switch to make the configuration take effect.

  • Configuration ineffectiveness

    If you use assign trunk command to modify Eth-Trunk specifications, the existing Eth-Trunk configuration will be invalid or lost. Exercise caution when you run this command.

    • When the configured Eth-Trunk specifications are reduced and the Eth-Trunks that exceed the specifications are configured, the configuration of excess Eth-Trunks is invalid.

    • When the configured value of group-number is larger than 128 or the configured value of member-number is larger than 16, the switch can only use the enhanced mode to load balance known unicast packets. The common mode is invalid for the known unicast packets.

  • Card installation

    If only cards with Eth-Trunk specification extension are installed on a switch and the configuration specified by the assign trunk command takes effect, the hash mode of cards that are installed later is as follows:

    • Card with Eth-Trunk specification extension: If the Eth-Trunk index is larger than 127, cards with Eth-Trunk specification extension work in advanced mode, and the corresponding configuration is generated. If the Eth-Trunk index does not exceed 127, cards with Eth-Trunk specification extension work in normal mode.

    • Card without Eth-Trunk specification extension: The Eth-Trunk index cannot exceed 127. However, if the Eth-Trunk index exceeds 127, the card without Eth-Trunk specification extension fails to be registered, and the L2IFPPI_1.3.6.1.4.1.2011.5.25.219.2.2.13_hwBoardPowerOff alarm is triggered. If the Eth-Trunk index does not exceed 127 but the value of member-number is larger than 8, the IFPDT_1.3.6.1.4.1.2011.5.25.157.2.247_hwBoardNotSupportAssignTrunk alarm is triggered.
      NOTE:

      The index is the internal number that the switch allocates to each Eth-Trunk, and is different from the Eth-Trunk ID. If the configured number of Eth-Trunks supported by the switch is larger than 128 and many Eth-Trunks are created on the switch, the index larger than 127 may be occupied. The card without Eth-Trunk specification extension can only use the index of 127 or smaller, the system checks the index and limits its registration. If the non-registered card without Eth-Trunk specification extension is reserved, this card cannot be registered even if the switch restarts.

    • You can run the display reset-reason command to check the registration failure cause. The system displays the message "This LPU only supports the trunks with index 127 or smaller than 127.". If the card without Eth-Trunk specification extension must be used, you must delete the Eth-Trunk with the index larger than 127.

  • Other

    • The card without Eth-Trunk specification extension and the card with Eth-Trunk specification extension working in normal mode do not support Eth-Trunk specification extensions. If the switch that is configured with Eth-Trunk specification extensions is equipped with these cards, a maximum of eight Eth-Trunk member interfaces are allowed on these cards.

    • If incoming traffic enters the Eth-Trunk on the card without Eth-Trunk specification extension, outgoing traffic goes out of the card with Eth-Trunk specification extension, and the Eth-Trunk on the card with Eth-Trunk specification extension has more than eight member interfaces, traffic may be unevenly load balanced on the Eth-Trunk of the card with Eth-Trunk specification extension and known unicast traffic can be only sent out from the eight Eth-Trunk member interfaces.

    • If a switch functions as a WLAN AC, X series cards are used and APs are connected to the switch through an inter-card Eth-Trunk on the user side, and non-X series cards are used on the network side, the actual Eth-Trunk specifications cannot reach those configured using this command and may be as low as half of the configured specifications.

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Updated: 2019-01-18

Document ID: EDOC1100038103

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