Netgear Switch M4100 User Manual download pdf (Page 331)

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Chapter 17. Tools | 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, W

eb, 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.

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