I try to link Huawei S1700-28FR-2T2P-AC to S3700-28TP-EI-DC with eSFP-GE-SX-MM850 from the two sides but the module led was off from the S1700 side.Is any wrong with the Huawei S3700 switch, which part should I check?
Have you enabled the SFP port from within the S1700's configuration?