Upgrade methods
Upgrading method | Software types | Remarks | ||||||||
---|---|---|---|---|---|---|---|---|---|---|
Upgrading from the CLI: | ||||||||||
Upgrading software |
| This method is disruptive. You must reboot the entire device to complete the upgrade. | ||||||||
Upgrading software through a warm reboot | Comware images | You can perform a warm reboot only on standalone devices. Compared to upgrading software through a reboot, warm reboot reduces the service downtime. | ||||||||
Performing an ISSU | Comware images | The ISSU method enables a software upgrade without service interruption. Use this method for an IRF fabric. For more information about ISSU, see "ISSU overview." | ||||||||
Upgrading from the Boot ROM menu |
| Use this method when the device cannot start up correctly.
Upgrade an IRF fabric from the CLI rather than the Boot ROM menu. The Boot ROM menu method increases the service downtime, because it requires that you upgrade the member devices one by one. |
This chapter only covers upgrading software from the CLI.