Hi all ! I have juniper ex2200-24t-4g switch with junos 10.4R2.6 with U-Boot 1.1.6 ,i want upgrade junos up to 12.3R12 but in this case i must upgrade bootloader before upgrading junos .I understand that the process will be non-trivial, especially because this switch is located in a remote office, so i need to update the firmware and bootloader as safely as possible and not lose access to the switch in the process ...So my question is: how to perform bootloader upgrade on ex series switches ?
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