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vDSL bonded bandwith doesnt add up

Bart van Dam
Level 1
Level 1

Hello,

I'm looking into a problem with a vDSL wan connection. I have two vDSL connections that are bonded. The line speed for each line is looking good (100mbit down / 30mbit up). I would expect that the total bandwith would be 200mbit down and 60 up however the controller doesnt show this. And download speeds are not near the 200mbit i would expect:

show controllers vdsl 0/1/0
Controller VDSL 0/1/0 is UP

Daemon Status:          UP

                        XTU-R (DS)              XTU-C (US)
Chip Vendor ID:         'BDCM'                   'BDCM'
Chip Vendor Specific:   0x0000                   0xB11C
Chip Vendor Country:    0xB500                   0xB500
Modem Vendor ID:        'CSCO'                   '    '
Modem Vendor Specific:  0x4602                   0x0000
Modem Vendor Country:   0xB500                   0x0000
Serial Number Near:     4331/K9 15.5(3)S5
Serial Number Far:
Modem Version Near:     15.5(3)S5
Modem Version Far:      0xb11c

Modem Status(L0):       TC Sync (Showtime!)
Modem Status(L1):       TC Sync (Showtime!)
DSL Config Mode:        AUTO
Trained Mode(L0):       G.993.2 (VDSL2) Profile 17a
Trained Mode(L1):       G.993.2 (VDSL2) Profile 17a

TC Mode:                PTM Bonded
Selftest Result:        0x00
DELT configuration:     disabled
DELT state:             not running
Number of Ports:        2
Port ID:                0               1
Link Status:            UP              UP
Aggr US Rate(kbps):     52902
Aggr DS Rate(kbps):     123373

Failed full inits:      0
Short inits:            0
Failed short inits:     0

Modem FW  Version:      4.14L.04
Modem PHY Version:      A2pvbF039p1.d26d

Line 0:

                        XTU-R (DS)              XTU-C (US)
Trellis:                 ON                      ON
SRA:                     enabled                 enabled
SRA count:               1                       1
Bit swap:                enabled                 enabled
Bit swap count:          62                      18
Line Attenuation:        17.3 dB                  0.0 dB
Signal Attenuation:       0.0 dB                  0.0 dB
Noise Margin:            11.1 dB                 5.0 dB
Attainable Rate:        99634 kbits/s            29292 kbits/s
Actual Power:           14.5 dBm                 8.3 dBm
Per Band Status:        D1      D2      D3      U0      U1      U2      U3
Line Attenuation(dB):   12.1    26.4    38.3    4.4     21.2    31.6    N/A
Signal Attenuation(dB): 13.9    26.2    38.3    4.4     20.8    30.8    N/A
Noise Margin(dB):       11.3    10.9    11.2    5.6     4.9     4.9     N/A
Total FECC:             3115158365                       23
Total ES:               14                       0
Total SES:              14                       0
Total LOSS:             4                        0
Total UAS:              195759                   195759
Total LPRS:             0                        0
Total LOFS:             9                        0
Total LOLS:             0                        0


                  DS Channel1     DS Channel0   US Channel1       US Channel0
Speed (kbps):             NA           80029            NA             28688
SRA Previous Speed:       NA           61677            NA             26630
Previous Speed:           NA           61677            NA             26630
Reed-Solomon EC:          NA              18            NA                 0
CRC Errors:               NA             712            NA                 0
Header Errors:            NA               0            NA                 0
Interleave (ms):          NA            0.00            NA              0.00
Actual INP:               NA           80.00            NA             77.00

Line 1:

                        XTU-R (DS)              XTU-C (US)
Trellis:                 ON                      ON
SRA:                     enabled                 enabled
SRA count:               2                       2
Bit swap:                enabled                 enabled
Bit swap count:          60                      23
Line Attenuation:        17.3 dB                  0.0 dB
Signal Attenuation:       0.0 dB                  0.0 dB
Noise Margin:             9.8 dB                 4.9 dB
Attainable Rate:        95931 kbits/s            30073 kbits/s
Actual Power:           14.5 dBm                 8.3 dBm
Per Band Status:        D1      D2      D3      U0      U1      U2      U3
Line Attenuation(dB):   12.1    26.3    39.2    4.0     20.4    31.5    N/A
Signal Attenuation(dB): 13.9    26.1    39.2    4.0     20.0    30.6    N/A
Noise Margin(dB):       9.8     9.7     9.9     6.1     4.9     4.8     N/A
Total FECC:             759                      0
Total ES:               4                        0
Total SES:              4                        0
Total LOSS:             1                        0
Total UAS:              4171                     4171
Total LPRS:             0                        0
Total LOFS:             3                        0
Total LOLS:             0                        0


                  DS Channel1     DS Channel0   US Channel1       US Channel0
Speed (kbps):             NA           80029            NA             29526
SRA Previous Speed:       NA           61639            NA             26070
Previous Speed:           NA           61639            NA             26070
Reed-Solomon EC:          NA              33            NA                 0
CRC Errors:               NA             174            NA                 0
Header Errors:            NA               0            NA                 0
Interleave (ms):          NA            0.00            NA              0.00
Actual INP:               NA           69.00            NA             75.00

Training Log :  Stopped
Training Log Filename : flash:vdsllog.bin

===

Modem FW  Version:      4.14L.04
Modem PHY Version:      A2pvbF039p1.d26d

Did i miss something ? I coudnt find anything on the forums or in the Bug search tool. Has anyone seen this behavior before ?

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