友讯D-Link 3420-28TC 万兆交换机 B1版本固件
国内和tw的网站都只有A1硬件的固件，没有B 版本的固件。
搜索了一下， 在俄罗斯的dlink网站找到了
https://dlink.ru/ru/products/1/1468.html
The DGS-3420 Layer 2+ stackable Gigabit Ethernet switch series are members of the D-Link xStack® family. Ranging from 10/100/1000Mbps edge switches to core gigabit switches, the xStack® switch family has been future-proof designed to provide a stacking architecture with fault tolerance, flexibility
DGS3420_Run_3_03_B003.had
通过tftp 服务器 升级到设备 boot up， 重启后升级成功。
