Netgear M4100-26G Software Administration Manual - Page 331

ProSafe M4100 and M7100 Managed Switches A screen similar to the following displays. 2. Scroll down and select the Source Port 1/0/2 check box. The value 1/0/2 now appears in the Interface field at the top. 3. Enter the following information: • In the Destination Port field, enter 1/0/3. • In the Session Mode field, select Enable. 4. Click Apply. Dual Image Traditionally switches contain a single image in the permanent storage. This image is loaded into memory every time there is a reboot. The dual image feature allows switches to have two images in permanent storage. You can denote one of these images as an active image that will be loaded in subsequent reboots and the other image as a backup image. This feature provides for reduced down time for the switches, when the firmware is being upgraded or downgraded. The images are stored in the file system with the file names image1 and image2. These names are used in the CLI, Web, and SNMP interfaces. Each of the images can be associated with a textual description. The switch provides commands to associate and retrieve the text description for an image. A switch also provides commands to activate the backup image such that it is loaded in subsequent reboots. This activation command makes the current active image as the backup image for subsequent reboots. On three successive errors executing the active-image, the switch attempts to execute the backup-image. If there are errors executing the backup-image as well, the bootloader will invoke the boot menu. The Dual Image feature works seamlessly with the stacking feature. All members in the stack must be uniform in their support for the dual Image feature. The Dual Image feature works in the following way in a Stack. • When an image is activated, the Management node notifies all the participating nodes. All nodes activate the specified image. Chapter 17. Tools | 331