<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM ELASTIC
NETWORKS INC. FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE
TO SUCH FINANCIAL STATEMENTS.
</LEGEND>
<CIK>0001088242
<NAME>ELASTIC NETWORKS INC.
<MULTIPLIER>1,000

<S>                             <C>                     <C>                     <C>                     <C>
<C>
<PERIOD-TYPE>                   YEAR                   YEAR                   YEAR                   6-MOS
6-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1998             DEC-31-1999             JUN-30-1999
             JUN-30-2000
<PERIOD-START>                             JAN-01-1997             JAN-01-1998             JAN-01-1999             JAN-01-1999
             JAN-01-2000
<PERIOD-END>                               DEC-31-1997             DEC-31-1998             DEC-31-1999             JUN-30-1999
             JUN-30-2000
<CASH>                                               0                       0                   3,863                       0
                   3,647
<SECURITIES>                                         0                       0                   1,750                       0
                     871
<RECEIVABLES>                                        0                      40                   1,820                       0
                   6,750
<ALLOWANCES>                                         0                       0                     250                       0
                     250
<INVENTORY>                                          0                     528                     759                       0
                   6,222
<CURRENT-ASSETS>                                     0                     568                   8,415                       0
                  17,696
<PP&E>                                              28                   1,287                   1,825                       0
                   3,565
<DEPRECIATION>                                       5                     120                     473                       0
                     787
<TOTAL-ASSETS>                                      23                   1,735                   9,869                       0
                  20,576
<CURRENT-LIABILITIES>                            1,480                   3,523                   9,671                       0
                  10,129
<BONDS>                                              0                       0                       0                       0
                       0
<PREFERRED-MANDATORY>                                0                       0                   7,965                       0
                  30,962
<PREFERRED>                                          0                       0                       0                       0
                       0
<COMMON>                                             0                       0                     154                       0
                     154
<OTHER-SE>                                           0                 (3,521)                 (9,163)                       0
                (21,830)
<TOTAL-LIABILITY-AND-EQUITY>                        23                   1,735                   9,869                       0
                  20,576
<SALES>                                              0                     233                   8,215                   2,600
                  14,693
<TOTAL-REVENUES>                                     0                     233                   8,215                   2,600
                  14,693
<CGS>                                                0                   2,146                  14,290                   5,509
                  14,131
<TOTAL-COSTS>                                        0                   2,146                  14,290                   5,509
                  14,131
<OTHER-EXPENSES>                                 4,503                  13,317                  14,870                   5,899
                  13,862
<LOSS-PROVISION>                                     0                       0                     250                       0
                       0
<INTEREST-EXPENSE>                                   0                       0                       0                       0
                       0
<INCOME-PRETAX>                                (4,503)                (15,230)                (20,855)                 (8,789)
                (13,297)
<INCOME-TAX>                                         0                       0                       0                       0
                       0
<INCOME-CONTINUING>                            (4,503)                (15,230)                (20,855)                 (8,789)
                (13,297)
<DISCONTINUED>                                       0                       0                       0                       0
                       0
<EXTRAORDINARY>                                      0                       0                       0                       0
                       0
<CHANGES>                                            0                       0                       0                       0
                       0
<NET-INCOME>                                   (4,503)                (15,230)                (20,855)                 (8,789)
                (13,297)
<EPS-BASIC>                                     (0.27)                  (0.93)                  (1.29)                  (0.54)
                  (0.83)
<EPS-DILUTED>                                   (0.27)                  (0.93)                  (1.29)                  (0.54)
                  (0.83)



</TABLE>