Virtex UltraScale+ 100G Ethernet Subsystem - Can a QSFP28 port work as 4 independent 25G interfaces?

[shencho]

Hi,

We are trying to use the Virtex UltraScale+ 100G Ethernet Subsystem to create 4 independent 25G links. However we cannot find a way to tell (from the LBUS interface) which GT link to send a particular packet / which GT link receives a particular packet. Did we miss something in the document, or it is just impossible?

Thanks for helping.

[ejanney]

Hi, the US+ 100G Ethernet Subsystem core does not support operating at 4 independent 25G interfaces.   We do have soft 10G/25G Ethernet Subsystems that allows for this.