Q:Which Ethernet interface should be used as the download interface (connecting with the TFTP Server) when upgrading the system software of 26XX/36XX series routers through TFTP
A:When upgrading the Quidway 26XX/36XX series routers through TFTP, it is necessary to use a special Ethernet interface as the download interface. The standard of choosing download interface is as follows:
For the R2620, R2621, R2630 and R2631: Choose Ethernet 0 as the download interface.
For the R3640: Search for 1FE modules in the sequence of slots 0, 2, 1 and 3, and take the Ethernet interface of the first 1FE module as the download interface. If no 1FE module is found, search for 2FE modules in the same sequence, and take Ethernet 0 of the first 2FE module as the download interface.
For the R3680: Search for 1FE modules in the sequence of slots 0, 2, 4, 6, 1, 3, 5 and 7, and take the Ethernet interface of the first 1FE module as the download interface. If no 1FE module is found, search for 2FE modules in the same sequence, and take Ethernet 0 of the first 2FE module as the download interface.
After deciding the download interface, connect it with a PC where TFTP Server is enabled. Then upgrade the router following the relevant upgrade guide.
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