Upgrading Stack Software
Context
Two methods are available to upgrade stack software: traditional upgrade and smooth upgrade. Table 3-44 compares the two upgrade methods.
| Upgrade Method | Command | Application Scenario | Master Switch After the Upgrade |
|---|---|---|---|
Traditional upgrade |
reboot |
All member switches in the stack must restart during a traditional upgrade. This upgrade method causes service interruption for a relatively long period of time and is appropriate for use in scenarios insensitive to the service interruption time. |
The switch with a high stack priority becomes the master switch. If switches have the same priority, the switch with a small MAC address becomes the master switch. |
Smooth upgrade |
|
Member switches in a stack can be divided into an active
area and a backup area that back up each other. Member switches in
the two areas are upgraded in turn. During the upgrade of an area,
traffic is transmitted through the other area, minimizing the impact
of the upgrade on services. This upgrade method is appropriate for
use in scenarios sensitive to the service interruption time. The stack
and networking must meet the following requirements:
|
After the upgrade, the master switch must be located in the backup area. |
Procedure
- Traditional upgrade
- Upload system software to the master switch in the stack. For details about how to upload files, see File Management in the S2720, S5700, and S6700 V200R019C10 Configuration Guide - Basic Configuration.
- Run the startup system-software system-file all command to set the next startup software for all member switches in the stack.
- Run the reboot command to upgrade the stack by restarting the entire system.
- Smooth upgrade
- Run the upgrade backup-area slot slot-id to slot-id command
to define the active and backup areas for a smooth upgrade.
The member switches with stack IDs in the specified range join the backup area, and the other member switches automatically join the active area.
Follow these rules to define the active and backup areas in a stack:- The active and backup areas cannot have the same member switch, and both areas must have at least one member switch.
- The backup area cannot contain the master switch of the stack.
- Member switches in each area must be directly connected.
- Member switches in the active and backup areas form the entire stack.
- Run the upgrade backup-area slot slot-id to slot-id command
to define the active and backup areas for a smooth upgrade.
