Hi

we have a problem with this switch and latest FW

before update, our switches worked well with SKYLANE optical SFPs

SBU35020DR3D

We choose this type of SFPs because they are equiped with SC connector, so we did not use any patch cable or converters to LC

this is very productive & strong solution on feeld. No unnecesary connectors, cables, converters

Well, our switches worked well with TL-SG3428(UN)_V2_20210131 version

but after upgrade, ... there is no data flow on SFPs

to be more specific

on test side, link never came up

on switch side, link came up, but TX laser seems to be disabled

so, SG3428 with SKYLANE SFP see that other side is transmitting and report LINK UP

but, TX on SG3428 is never enabled, so other side does not "see" laser, and link stay DOWN

looks like TX_Disable pin is always active ?

again, there was NO problem with prev. firmware

and, changelog does NOT say anithing about changed SFP functionality

to be sure, i tested with various vendor on TEST side

SG3428 was always equiped with SKYLANE SFP, and other side was changed, aprox 10 various manufacturer

no luck

Please TP_LINK

any solution ?

https: //portal.skylaneoptics.com/datasheet/SBU35020DRxx.pdf