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First, upgrade the ROMMON to, a minimum, 15.0(1R)SG11 (Upgrading the System Software). If possible, go straight to 15.0(1r)SG16，这台交换机不支持15.0（1r）SG16，可以用15.0（1r）SG15，再然后再升级ios版本吗，谢谢
