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As Leo has described, every stack member needs to reload in order to run a newer IOS. (Of course, you can upgrade the IOS in a stack members flash without reloading the switch, but then its not yet running that image.)
Starting with release 58, 3750X stacks have a new feature, rolling stack upgrade (RSU), which tries to minimize the impact of upgrading IOS across stack members.
This is actually a pretty cool feature, i didn't even know it existed until I was looking for a solution to advertise a subnet (prefix in BGP talk), only if a certain condition existed. This is exactly what conditional advertisements does
j ai une question j ai achete un routeur cisco 887VA-k9 , je le configuré avec la configuration ci- dessous
si je le lier avec mon pc portable sur l un de ses ports directement ça marche toute est bien ( la connexion internet + m...
Attached policy provides CLI access to the Cisco 4G router over text messaging. Two files are in the attached .tar file:
2. PDF with instructions on how to load and use the .tcl file.