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Configuration Guide - Device Management

S9300, S9300E, and S9300X V200R012C00

This document describes the configurations of Device Management, including device status query, hardware management, CSS, SVF, PoE, OPS, OIDS, energy-saving management, information center, fault management, NTP, synchronous ethernet, PTP.
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Upgrading CSS Software

Upgrading CSS Software


Two methods are available to upgrade CSS software: system restart and fast upgrade.

Table 3-15  Comparison of system restart and fast upgrade
Upgrade Method Command Application Scenario Role Change After the Upgrade

System restart


The system restart method is frequently used. This upgrade method causes lengthy service interruptions and applies to scenarios insensitive to the service interruption time.

The switch with a higher CSS priority becomes the master switch. If switches have the same priority, the switch with a smaller MAC address becomes the master switch.

Fast upgrade

css fast upgrade

The fast upgrade minimizes the impact of the upgrade on services. This upgrade method applies to scenarios sensitive to the service interruption time.


To minimize traffic loss during an upgrade, bundle CSS uplinks and downlinks into Eth-Trunks for link redundancy.

  • The previous standby switch becomes the master switch.

  • The previous master switch becomes the standby switch.

During a fast upgrade, if one of the following situations occurs, the upgrade will fail and the system will automatically perform version and patch rollback:
  • Boards do not register for a long period during the upgrade of the standby chassis.
  • Configurations cannot be restored or backed up in a batch for a long period during the upgrade of the standby chassis.
To view information about the preceding fast upgrade failures, check the log CSSM/6/FASTUPGRADEROLLBACK.

In CSS card clustering mode, if the fast upgrade fails, the standby chassis will roll back to the old version and join the master chassis to set up a CSS. In service port clustering mode, if the fast upgrade fails, the standby chassis will roll back to the old version and start, enter the single-chassis CSS state, restart and then join the CSS after the boards on the standby chassis register. The rollback process lasts at most 1 hour. During the rollback, ports and services on the master chassis will be working normally, and the ports on the standby chassis will remain Down. Do not perform operations on the standby chassis hardware during the rollback, for example, install, remove, reset, or power off the boards on the standby chassis.


  1. Load the new system software version to the master MPU of the CSS. For details on how to load the file, see File Management in the S9300, S9300E, and S9300X V200R012C00 Configuration Guide - Basic Configuration.
  2. Run the startup system-software system-file all command to configure the system software file name that is used by all MPUs for next startup.

    In this process, the system software is copied from the CSS master MPU to all the MPUs.

  3. Run the reboot command to upgrade the CSS using the system restart method.


    Run the css fast upgrade command to quickly upgrade the CSS.

    During fast CSS upgrade, run the display css fast upgrade state command to check the fast upgrade phase and status.

Updated: 2018-09-03

Document ID: EDOC1100038289

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