    AST RESEARCH, INC.         TECHNICAL BULLETIN #0719                  11-07-91

                      AST ETHERNODE AND SMC CONCENTRATORS/HUBS

    PROBLEM:       When connecting multiple NetWare servers using SMC's (Standard
                   Microsystems Corporation) Concentrators/hubs, the error "file
                   server not found" is displayed on the workstation.  If only
                   one file server is connected, a connection can be made.

    CAUSE:         SMC has a documented bug which does not allow connecting
                   multiple servers via their earlier concentrators/hubs.

    SOLUTION:      Customers experiencing this problem should contact SMC for an
                   upgrade to a revision G or higher.