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Tested multiple brands of 1gb base-t coper SFP, none of them work with the TZ570 (tested with Link Speed set to 1gb)
Are the SFP ports vendor locked ?
1gb dac cable works fine.
Please find the supported SFP modules list for SonicWall in this Knowledge Base Article
I use "generic" 10gb SFP+ DAC cables from fs without issues on my 2700 and 670, as well as 1gb SFP DAC cables for my 470s.
Same here, all DAC cables work without issues.
Alle tested SFP 1gb Base-t rj45 do not work.
470 has no SFP ports. (only tz570 & tz 670)