The March Driver Pack for NA has the wrong RegEx for finding the Serial Number for Brocade MLX switches. The workaround is to unzip the Foundry_JS.rdp file change the snapshot_parser.js file.
The problem is with the regex expression for
cake.snapshot.patter_SerialNumber = /\n[\t ]+Serial +#: ?(\S+)/;
A more correct regex pattern that works with Brocade MLX’s should show the following:
cake.snapshot.pattern_SerialNumber = /\n[\t ]+Serial +#: ?(\S+)|Chassis.*?Serial +#: ?(\S+?)[, ]/;
Once you make the change rezip the file Foundry_JS.rdp and then reload the drivers. Please fix this defect.