Set ip-addresses and try to ping eachother.
192.168.1.1 en 192.168.1.2
subnetmask 255.255.255.0
Or r those 2 switches if so
ping them both have separate ip-addresses.
LED link/act not flashing is from switch or card<- if card try ping 127.0.0.1 if that works update drivers.
- if port on switch or switch in total, try first other port in switch else reset switch.
Else make a serial connection and try to sent packages from switch to sumthin else or do a test.
Hope it is info u needed
Make sure they have same networkconfigurations if it r computers but not same ip adress.