Netgear XCM8806 Chassis Hardware Installation Guide - Page 1323

NETGEAR 8800 Chassis Switch CLI Manual the module. When you make the alternate partition active, by issuing the use image command and rebooting the switch, the module is also activated at boot time. To install a module to the active partition, use the install firmware command to install the module. Remember, the core image on the active partition must be of the same version as the module. If you reboot the switch, the module will also be activated, but you can activate the module without rebooting the switch by issuing the run update command. After issuing that command, all the functionality, and CLI commands, of the module will be available. Performing a Hitless Upgrade If you specify the msm parameter on a NETGEAR 8800 series switch, you can initiate hitless upgrade between the primary and backup MSMs installed in the switch. Hitless upgrade is a mechanism that allows you to upgrade the NETGEAR 8800 software running on the switch without taking the switch out of service. Some additional benefits of using hitless upgrade include: • Minimizing network downtime • Reducing the amount of traffic lost Although any method of upgrading software can have an impact on network operation, including interrupting Layer 2 network operation, performing a hitless upgrade can decrease that impact. Regardless of how you upgrade the software, you must: • View the current switch information to determine your selected and booted image partitions, verify which MSM is the primary and which is the backup, and confirm that the MSMs are synchronized using the show switch command • Select the partition to use when downloading the image using the download image [[ | ] {{vr} } | memorycard ] {} {msm } command. When performing a hitless upgrade, you must first download the software to the backup MSM. Download the image to the alternate partition. Use the install image {} {msm } {reboot} command to install the software image at a later time. After the software is downloaded and installed on the switch, use the run msm-failover command to initiate failover from the primary MSM to the backup MSM. The original primary MSM becomes the new backup MSM. After failover is complete, download the software to the new backup MSM. Again, download the image to the alternate partition, and use the install image {} {msm } {reboot} command to install the software image at a later time. For more detailed information about hitless upgrade, see the download image command. Example The following command installs the software image file NG8800-12.4.3.5-1-4.xos on a NETGEAR 8810 switch: install image NG8800-12.4.3.5-1-4.xos Appendix A. Configuration and Image Commands | 1323