SMB credits determine the number of outstanding simultaneous requests that the client can have on a particular connection. Default value does not need to be changed unless issue is confirmed to be roo...SMB credits determine the number of outstanding simultaneous requests that the client can have on a particular connection. Default value does not need to be changed unless issue is confirmed to be root cause or vendor states a specific number of credits are needed. While it is possible to set number of credits to 2, there have been reports that some clients start to misbehave with such a low setting