I see a few threads on this floating around not sure if later F/W has sorted it or not. We have a link running Fibrestore SFP+ DWDM 80km modules in two CCR1072. The link works fine when manually negotiated to 1gpbs but on auto it will not connect when manually or automatically set to 10gbps. Fibre attenuation is well within spec for these modules.
Any ideas to try?