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S12700 V200R010C00 Configuration Guide - Device Management

This document describes the principles and configurations of the Device Management features, and provides configuration examples of these features.
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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).
Configuring CSS Software

Configuring CSS Software

Context

Table 8-4 lists software configurations for establishing a CSS.

Table 8-4  Software configurations
Item Description Remarks
Setting the CSS card connection mode

By default, two S12700s set up a CSS in CSS card connection mode; therefore, this step can be omitted.

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Configuring a CSS ID

The two member switches in a CSS must use different CSS IDs (1 and 2). Switches with the same CSS ID cannot set up a CSS. By default, all switches use CSS ID 1. Before establishing a CSS, change the CSS ID to 2 on one of the member switches.

Do not change the CSS ID of a member switch after a CSS is established. Otherwise, the CSS splits.

Setting the type of ports used for cluster connections (applicable to some switch models)

On the S12710 and SFUB-installed S12704&S12708&S12712, two types of ports can be used for CSS connections: four 10G ports and one 40G port. Before setting up a CSS, set the port type based on CSS connection requirements.

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(Optional) Configuring a CSS priority

The CSS priority determines the roles of member switches during role election. A larger value indicates a higher priority and higher probability that the member switch is elected as the master switch.

By default, the CSS priority of a switch is 1.

In a CSS using MPUBs, if a switch with the highest priority starts slowly, it will not be elected as the master switch. If you want a switch to be the master switch, start the switch first. When two switches start at the same time, the switch with the higher CSS priority becomes the master switch.

In a CSS using other MPU models, CSS master election does not involve comparing which CSS member starts first. The CSS member with the highest CSS priority becomes the CSS master.

(Optional) Specifying the master switch forcibly

Generally, the master switch of a CSS is elected when the CSS is set up. You can also forcibly specify one switch as the master switch of a CSS.

If this step is performed on two switches before they set up a CSS, the configuration does not take effect after the CSS is set up. The master switch of the CSS is elected through competition.

After a switch is manually specified as the master switch, a forcible master/standby switchover may occur when both switches run normally. If a master/standby switchover occurs, network services may be affected. Therefore, specifying the master switch forcibly is not recommended.

Enabling the CSS function and restarting switches

By default, the CSS function is disabled on a switch.

The CSS function must be enabled on both two member switches.

You can run the display css status [ saved ] command to check whether the CSS function is enabled on the current switch. If the parameter saved is set, you can view the saved CSS configuration.

Procedure

  1. Run the system-view command to enter the system view.
  2. Run the set css mode css-card command to set the CSS card connection mode.
  3. Run the css port media-type { sfp+ | qsfp+ } command to set the type of ports used for cluster connections.

    This configuration is supported only on the S12710 and SFUB-installed S12704&S12708&S12712.

  4. Run the set css id new-id command to set a CSS ID for the switch.
  5. (Optional) Run the set css priority priority command to set a CSS priority for the switch.
  6. (Optional) Run the css master force command to specify the switch as the master switch.
  7. Run the css enable command to enable the CSS function on the switch.

    After you enable the CSS function, the system prompts you to restart the switches. Enter Y to restart the switches; otherwise, configurations cannot take effect, and the CSS cannot be established.

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Updated: 2019-08-21

Document ID: EDOC1000142080

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