Fixed optical interfaces on the S5306TP-LI-AC, S5300EI, S5300SI, and S5300HI support 100M optical modules, while interfaces on extended front cards do not support 100M optical modules.
In the S5300LI series, only the S5300-28X-LI-24S-AC, S5300-28TP-PWR-LI-AC, S5300-52X-LI-48CS-AC, S5300-52X-LI-48CS-DC, and S5300-28X-LI-24S-DC support 100M optical modules on their 100/1000Base-X optical interfaces.
The S5310EI series switches support 100M optical modules only on their combo optical interfaces.
Combo optical interfaces and 100/1000Base-X optical interfaces on the S5320EI series switches support 100M optical modules.
The S5320SI series switches support 100M optical modules only on their combo optical interfaces.