I have made several tests with my 3845 router and NM-16ESW and I found this problem :
I have PCs in main building connected in Gigabit to a switch which is connected to the 3845 in Gigabit too. The 3845 is linked to 4 other buildings via Hertzian Waves at 100Mb with its NM-16ESW.
PCs are on port Gi0/1 of 3845
Building A on port Fa1/0 of NM-16ESW
Building B on port Fa1/1 of NM-16ESW
Building C on port Fa1/2 of NM-16ESW
Building D on port Fa1/3 of NM-16ESW
When I generate a 100 Mb traffic from 1 PC in main building to 1 PC in bulding A --> bandwidth is 100Mb/s.
When I generate a 100 Mb traffic from 2 PCs in main building to 1 PC in bulding A and 1 PC in building B --> bandwidth is 50Mb/s for each connection.
When I generate a 100 Mb traffic from 3 PCs in main building to 1 PC in bulding A and 1 PC in building B and 1PC in building C --> bandwidth is 33Mb/s for each connection.
It seems that NM-16ESW shared 100Mb/s to all ports, we don't have 100Mb/s dedicated per port.
Is this problem located on my NM-16ESW card or it is a general one ? Is there a command to unlock this limitation and have a full 100Mb link dedicated by interface ?
Thanks a lot for your responses !