in our company we have two locations for the Storage`s with a distance about 15km.
When we moved last week we saw that the connection speed of one Fabric ist just 2Gb - not the 4Gb we want.
We`r using on both locations and both fabrics MDS9124 FC Switches, CWDM-MUX8A, connection between the locations is dark fibre.
The uplink to the fc switch of one fabric works fine with the 4GB GBics CWDM4G1470 and 1490 wavelenght.
The second fabric uplink (it takes another, independent way to 2nd location) will only work with 2Gb CWDM-1510 and 1530 GBics.
If we install CWDM4G1470 and 1490 Gbics (on both locations) we just get a link failure on the FC Switch.
The GBics are OK - we changed them with the other Fabric one. We also changed all Single Mode FC cables before/after the MUX8A - without success
Also after changing buffer credits - no link.
Can anyone help?