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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 QUARTERS ENDED   TWO FISCAL QUARTERS ENDED
                                                   ---------------------  ---------------------------
                                                    Nov 1,       Nov 2,        Nov 1,       Nov 2,
                                                     1998         1997          1998         1997
                                                   --------     --------      --------     --------
<S>                                                <C>          <C>           <C>          <C>
BASIC EARNINGS PER SHARE                                                                  
                                                                                          
 Net earnings                                      $ 53,314     $ 57,993      $ 88,834     $122,347
                                                   ========     ========      ========     ======== 
                                                                                          
 Common Shares outstanding                                                                
  at the beginning of the period                    176,558      174,245       175,686      171,859
                                                                                          
 Weighted average number of Common Shares                                                 
   issued during the period                             208          488           744        1,971
                                                   --------     --------      --------     --------
                                                                                          
 Weighted average number of Common Shares                                                 
   outstanding during the period                    176,766      174,733       176,430      173,830
                                                   ========     ========      ========     ======== 
                                                                                          
 Basic earnings per share                          $   0.30     $   0.33      $   0.50     $   0.70
                                                   ========     ========      ========     ======== 
                                                                                          
FULLY DILUTED EARNINGS PER SHARE                                                          
                                                                                          
 Earnings before imputed earnings                  $ 53,314     $ 57,993      $ 88,834     $122,347
                                                                                          
 After tax imputed earnings from the investment                                           
   of funds received through dilution                    --        4,363            --        8,342
                                                   --------     --------      --------     --------
                                                                                          
 Adjusted net earnings                             $ 53,314     $ 62,356      $ 88,834     $130,689
                                                   ========     ========      ========     ======== 
                                                                                          
 Weighted average number of Common Shares                                                 
   outstanding during the period                    176,766      174,733       176,430      173,830
                                                                                          
 Weighted average common share                                                            
   equivalents based on conversion of                                                     
   outstanding stock options                             --       15,783            --       15,953
                                                   --------     --------      --------     --------
                                                                                          
 Weighted average number of Common                                                        
   Shares and equivalents outstanding                                                     
   during the period                                176,766      190,516       176,430      189,783
                                                   ========     ========      ========     ======== 
                                                                                          
 Fully diluted earnings per share                  $   0.30     $   0.33      $   0.50     $   0.69
                                                   ========     ========      ========     ======== 
                                                                                          
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                $ 0.6520     $ 0.7204      $ 0.6667     $ 0.7223
                                                                                          
 Basic earnings per share, in U.S. dollars         $   0.20     $   0.24      $   0.34     $   0.51
                                                   ========     ========      ========     ======== 
                                                                                          
 Fully diluted earnings per share, in U.S. dollars $   0.20     $   0.24      $   0.34     $   0.50
                                                   ========     ========      ========     ======== 
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