A new DWDM 2 Gbit intersite link has just been installed. Connectivity between the 2 switches has been established but the link does not seem to be running at the required speed. The link supplier has confirmed that everything is as expected from their perspective.

I would apprecaite it if anyone could provide what port settings should be set on both switches and what can be checked from a switch perspective to validate speed of link. Connections at presnet are Multimode at both ends into shortwave Gbics.