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S12700 Series Agile Switches Typical Configuration Examples

This document provides examples for configuring features in typical usage scenarios.
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Precautions for Inter-Card Eth-Trunk Deployment

Precautions for Inter-Card Eth-Trunk Deployment

Interfaces on different cards on a modular switch may be added to an Eth-Trunk to improve reliability. If cards with Eth-Trunk specification extension are involved in an inter-card Eth-Trunk, the following requirements apply to the hash mode of the cards:

  • 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.

  • If an Eth-Trunk is configured between cards with Eth-Trunk specification extension, the hash mode of the cards must be the same.

Cards are classified into cards with and without Eth-Trunk specification extension, as described in Table 7-1.
Table 7-1  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)

Precautions for an Inter-Card Eth-Trunk Without Eth-Trunk Specification Extension

  • Upgrade

    After a version earlier than V200R010C00 is upgraded to V200R010C00 or a later version, the card hash mode is as follows:

    • 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 7-2 lists the hash modes of cards in a slot before and after card replacement.
    Table 7-2  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 an Inter-Card Eth-Trunk with Eth-Trunk Specification Extension

  • Upgrade

    After a version earlier than V200R010C00 is upgraded to V200R010C00 or a later version, the card hash mode is as follows:

    • 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.

  • Configuration effectiveness

    • When the 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 the 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 the 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.

  • Load balancing

    • 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 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 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.

  • 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.

  • Card replacement

    Table 7-3 lists the hash modes of cards in a slot before and after card replacement.
    Table 7-3  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.

    • 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.

    • 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.

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Updated: 2019-05-16

Document ID: EDOC1000069466

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