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                                                                    EXHIBIT 11.1

                        NEWBRIDGE NETWORKS CORPORATION

                       COMPUTATION OF EARNINGS PER SHARE

             (Accounting principles generally accepted in Canada)
        (Canadian dollars, amounts in thousands except per share data)
                                  (Unaudited)

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                                                                Fiscal quarter ended              Three fiscal quarters ended      
                                                                --------------------              ---------------------------      
                                                                                                                                   
                                                              Jan 26,           Jan 28,            Jan 26,            Jan 28,      
                                                                1997             1996                1997               1996       
                                                                ----             ----                ----               ----       
<S>                                                           <C>               <C>                <C>                <C>          
Basic earnings per share                                                                                                           
                                                                                                                                   
    Net earnings                                              $63,031           $53,881            $186,613           $136,369     
                                                               ======            ======             =======            =======     
                                                                                                                                   
    Common Shares outstanding                                                                                                      
       at the beginning of the period                         170,741           165,752             168,676            164,515     
                                                                                                                                   
                                                                                                                                   
    Weighted average number of Common Shares                                                                                       
       issued, net of Common Shares                                                                                                
       repurchased, during the period                             200               796               1,464              1,327     
                                                              -------           -------             -------            -------     
                                                                                                                                   
    Weighted average number of Common Shares                                                                                       
       outstanding at the end of the period                   170,941           166,548             170,140            165,842     
                                                              =======           =======             =======            =======     
                                                                                                                                   
    Basic earnings per share                                    $0.37             $0.32               $1.10              $0.82      
                                                              =======           =======             =======            =======     
                                                                                                                                   
Fully diluted earnings per share                                                                                                   
                                                                                                                                   
    Earnings before imputed earnings                          $63,031           $53,881            $186,613           $136,369     
                                                                                                                                   
    After tax imputed earnings from the investment                                                                                 
       of funds received through dilution                       2,693             2,721               8,241              7,589     
                                                              -------           -------             -------            -------     
                                                                                                                                   
    Adjusted net earnings                                     $65,724           $56,602            $194,854           $143,958     
                                                               ======            ======             =======            =======     
                                                                                                                                   
    Weighted average number of Common Shares                                                                                       
       outstanding at the end of the period                   170,941           166,548             170,140            165,842     
                                                                                                                                   
    Weighted average common share                                                                                                  
       equivalents based on conversion of                                                                                          
       outstanding stock options                               14,096            13,986              13,500             13,823     
                                                              -------           -------            --------            -------     
                                                                                                                                   
    Weighted average number of Common                                                                                              
       Shares and equivalents outstanding at                                                                                       
       the end of the period                                  185,037           180,534             183,640            179,665     
                                                              =======           =======             =======            =======     
                                                                                                                                   
    Fully diluted earnings per share                            $0.36             $0.31               $1.06              $0.80      
                                                              =======           =======             =======            =======     
                                                                                                                                   
Earnings per share expressed in U.S. Dollars                                                                                       
                                                                                                                                   
    Daily average exchange rate of a Canadian                                                                                      
       dollar for U.S. dollars as reported by the                                                                                  
       Federal Reserve Bank of New York                       $0.7406           $0.7342             $0.7346            $0.7354      
                                                                                                                                   
    Basic earnings per share, in U.S. dollars                   $0.27             $0.24               $0.81              $0.60      
                                                              =======           =======             =======            =======     
                                                                                                                                   
    Fully diluted earnings per share, in U.S. dollars           $0.26             $0.23               $0.78              $0.59      
                                                              =======           =======             =======            =======      
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