![]() So on this stack, where 4 is the master, dir flash: and dir flash4: will look the same.Ĥ)Now get that IOS image onto the other switches in the stack. You can also refer to a particular stack member’s flash like this: dir flash2. When you refer to “flash:”, you are always referring to the master. Let’s say there are four switches and the master is 4.Ģ)Use copy tftp flash: and answer the prompts to get your IOS up there.ģ)You can do dir flash: to see that the new IOS is there. Do show stack to find out how many switches are in the stack, and which one is the master. What makes switch stacks different is that you need to copy the IOS to all of the switches. When you are ready to start using it, change the boot system command on the device to point to it, and reload. Make sure there is room for it in the flash of the target device, and tftp it up. ![]() Upgrading a switch is like upgrading a router, really. There are some new IOS commands to automate upgrading of a stack, but I use the familiar manual method.Īll of your stack members really should be running the same version of IOS (even though there’s a chance that if the versions are close enough the stack might still work). If you want to upgrade IOS on a 3750 switch stack follow this procedure
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