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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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<CAPTION> 
                                                     Fiscal quarter ended  Three fiscal quarters ended
                                                     --------------------  ---------------------------
                                                        Feb 1,    Jan 26,      Feb 1,      Jan 26,
                                                         1998       1997        1998         1997
                                                         ----       ----        ----         ----  
<S>                                                   <C>         <C>         <C>          <C>
Basic earnings (loss) per share                                                                
                                                                                        
 Net earnings (loss)                                  $(144,283)  $ 63,031    $(21,936)    $186,613
                                                      =========   ========    ========     ========
                                                                                        
 Common Shares outstanding                                                              
  at the beginning of the period                        175,305    170,741     171,859      168,676
                                                                                        
 Weighted average number of Common Shares                                               
   issued, net of Common Shares                                                         
   repurchased, during the period                            71        200       2,479        1,464
                                                      ---------   --------    --------     --------
                                                                                        
 Weighted average number of Common Shares                                               
   outstanding during the period                        175,376    170,941     174,338      170,140
                                                      =========   ========    ========     ========
                                                                                        
 Basic earnings (loss) per share                            (82)c       37c        (13)c   $   1.10
                                                      =========   ========    ========     ========
                                                                                        
Fully diluted earnings (loss) per share                                                 
                                                                                        
 Earnings (loss) before imputed earnings              $(144,283)  $ 63,031    $(21,936)    $186,613
                                                                                        
 After tax imputed earnings from the investment                                         
   of funds received through dilution                        --      2,693          --        8,241
                                                      ---------   --------    --------     --------
                                                                                        
 Adjusted net earnings (loss)                         $(144,283)  $ 65,724    $(21,936)    $194,854
                                                      =========   ========    ========     ========
                                                                                        
 Weighted average number of Common Shares                                               
   outstanding during the period                        175,376    170,941     174,338      170,140
                                                                                        
 Weighted average common share                                                          
   equivalents based on conversion of                                                   
   outstanding stock options                                 --     14,096          --       13,500
                                                      ---------   --------    --------     --------
                                                                                        
 Weighted average number of Common                                                      
   Shares and equivalents outstanding                                                   
   during the period                                    175,376    185,037     174,338      183,640
                                                      =========   ========    ========     ========
                                                                                        
 Fully diluted earnings (loss) per share                    (82)c       36c        (13)c   $   1.06
                                                      =========   ========    ========     ========
                                                                                        
Earnings (loss) 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                     $0.7006    $0.7406     $0.7071     $ 0.7346
                                                                                        
 Basic earnings (loss) per share, in U.S. dollars           (58)c       27c         (9)c         81c 
                                                      =========   ========    ========     ========
                                                                                        
 Fully diluted earnings (loss) per share, in U.S. 
   dollars                                                  (58)c       26c         (9)c         78c 
                                                      =========   ========    ========     ========
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