Why the ASF13-24-10 1.25G SFP transceiver 10km works well on two H3C S5120V2, but can’t work on S5120V2-28P-SI and S5500V2-24P-S?

Solution:Please check the SFP transceiver is linked with Gigabit port correctly, not 10Gig port. There are 4 optical ports on H3C switch S5500v2, two of them are on rate of 1000M and the other two are on rate of 10 Gigabit.

Tips: Please check the switch port parameter before connection, to make sure the transceivers are linked with the right ports.