<PAGE>

$/nofolio


                                                                    EXHIBIT 11.2
                         NEWBRIDGE NETWORKS CORPORATION

                       COMPUTATION OF EARNINGS PER SHARE

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


<TABLE>
<CAPTION>
                                                   Fiscal quarters ended    Three fiscal quarters ended
                                                   ---------------------    ---------------------------
                                                      Jan 30,     Jan 31,     Jan 30,     Jan 31,
                                                       2000        1999        2000        1999
                                                    ---------    --------   ---------    --------
<S>                                                 <C>          <C>        <C>          <C>
Net earnings (loss) - U.S. GAAP
 Net earnings (loss), as reported, Cdn GAAP         $(274,646)   $120,119   $  74,349    $208,953

 Write off of purchased research and
  development in process                              (81,238)         --    (135,667)         --

 Amortization of purchased research and
  development in process, Cdn GAAP                     40,475          --      56,617          --
                                                    ---------    --------   ---------    --------

Net earnings (loss), U.S. GAAP                      $(315,409)   $120,119   $  (4,701)   $208,953
                                                    =========    ========   =========    ========

Earnings (loss) per share (U.S. GAAP - Basic)

 Net earnings (loss)                                $(315,409)   $120,119   $  (4,701)   $208,953
                                                    =========    ========   =========    ========

 Weighted average number of Common
   Shares outstanding during the period               181,406     177,596     180,889     176,814
                                                    =========    ========   =========    ========

 Earnings (loss) per share (U.S. GAAP)                 $(1.74)      $0.68      $(0.03)      $1.18
                                                    =========    ========   =========    ========

Earnings (loss) per share (U.S. GAAP- Diluted)

 Net earnings (loss)                                $(315,409)   $120,119   $  (4,701)   $208,953
                                                    =========    ========   =========    ========

 Weighted average number of Common Shares
   outstanding during the period                      181,406     177,596     180,889     176,814

 Net effect of dilutive stock options
   based on the treasury stock method                      --       4,434          --          --
                                                    ---------    --------   ---------    --------

 Weighted average number of Common
   Shares and equivalents outstanding
   during the period                                  181,406     182,030     180,889     176,814
                                                    =========    ========   =========    ========

 Earnings (loss) per share (U.S. GAAP)             $    (1.74)  $    0.66   $   (0.03)   $   1.18
                                                    =========    ========   =========     =======
</TABLE>