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ADSL connection issues

Hi Guys,

One of our clients had a poor ADSL connection and the ISP checked on it and advised us that the ADSL is currently not on ADSL2+ ( which I could verify from the router ) and they changed the connection profile from their end.

After the change, when I do the "show controllers VDSL 0" command , it does not show me the uplink parameters ( as highlighted below)  although the site still has Internet access.

Is this a bug ? or can someone explain me what is going on here ?

Appreciate your help.


NZ_R01#show controllers vdSL 0

Controller VDSL 0 is UP

Daemon Status:           Up

                        XTU-R (DS)              XTU-C (US)

Chip Vendor ID:         'BDCM'                   'IKNS'

Chip Vendor Specific:   0x0000                   0x0001

Chip Vendor Country:    0xB500                   0xB500

Modem Vendor ID:        'CSCO'                   '    '

Modem Vendor Specific:  0x4602                   0x0000

Modem Vendor Country:   0xB500                   0x0000

Serial Number Near:    FTX160883LB C887VA- 15.2(4)M

Serial Number Far:     ^A

Modem Version Near:    15.2(4)M

Modem Version Far:     0x0001

Modem Status:            TC Sync (Showtime!)

DSL Config Mode:         AUTO

Trained Mode:            G.992.5 (ADSL2+) Annex A

TC Mode:                 ATM

Selftest Result:         0x00

DELT configuration:      disabled

DELT state:              not running

Trellis:                 ON                       OFF

SRA:                     disabled                        disabled

SRA count:              0                       0

Bit swap:                enabled                         enabled

Bit swap count:         0                       0

Line Attenuation:         7.5 dB                  4.0 dB

Signal Attenuation:       9.4 dB                  3.6 dB

Noise Margin:            12.1 dB                 dB

Attainable Rate:        25564 kbits/s            0 kbits/s

Actual Power:             0.0 dBm                10.1 dBm

Total FECC:             0                        0

Total ES:               0                        1

Total SES:              0                        0

Total LOSS:             0                        0

Total UAS:              45                       45

Total LPRS:             0                        0

Total LOFS:             0                        0

Total LOLS:             0                        0

Full inits:             1

Failed full inits:      0

Short inits:            0

Failed short inits:     0

Firmware        Source          File Name (version)

--------        ------          -------------------

VDSL            embedded        VDSL_LINUX_DEV_01212008 (1)

Modem FW  Version:      120306_1254-4.02L.03.A2pv6C035j.d23j

Modem PHY Version:      A2pv6C035j.d23j

Vendor Version:         Ap6v35j.23j 68

                  DS Channel1     DS Channel0   US Channel1       US Channel0

Speed (kbps):             0            21080             0               110

SRA Previous Speed:       0                0             0                 0

Previous Speed:           0                0             0                 0

Total Cells:              0        102764074             0                 0

User Cells:               0           446678             0                 0

Reed-Solomon EC:          0                0             0                 0

CRC Errors:               0                0             0                 1

Header Errors:            0                0             0                 0

Interleave (ms):       0.00             7.92          0.00             15.00

Actual INP:            0.00             2.03          0.00              2.00

Training Log :  Stopped

Training Log Filename : flash:vdsllog.bin





did you try to re-train your ADSL link and got the same result? try to shut/no shut ATM.

you might also want to consider the 'Speed' parameter instead.

                  DS Channel1     DS Channel0   US Channel1       US Channel0

Speed (kbps):             0            21080             0               110


Hi johnlloyd_13,

Sorry for the late reply, Yes I reloaded the router ( I can't shut/no Shut ATM because I'm doing everything remotely, I think reloading the router would have the same effect on the ATM interface ?? ).

The Interesting thing is that, I got one of the users in the site to do a test from behind the router and he is getting around 5Mbps/0.5Mbps dowb/up speeds ( but varies with time ) which doesn't make sense. 

Please have a look at the "show int dial 1" output, ATM and Dialer configs for this. Please let me know if you can see anything obvious.

Router_NZ_R01#show int di 1

Dialer1 is up, line protocol is up (spoofing)

  Hardware is Unknown

  Internet address is

  MTU 1500 bytes, BW 56 Kbit/sec, DLY 20000 usec,

     reliability 255/255, txload 255/255, rxload 236/255

  Encapsulation PPP, LCP Closed, loopback not set

  Keepalive set (10 sec)

  DTR is pulsed for 1 seconds on reset

  Interface is bound to Vi2

  Last input never, output never, output hang never

  Last clearing of "show interface" counters 17:00:38

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 52000 bits/sec, 6 packets/sec

  5 minute output rate 0 bits/sec, 0 packets/sec

     98068 packets input, 47660493 bytes

     101384 packets output, 28163255 bytes

Bound to:

Virtual-Access2 is up, line protocol is up

  Hardware is Virtual Access interface

  MTU 1500 bytes, BW 500 Kbit/sec, DLY 20000 usec,

     reliability 255/255, txload 48/255, rxload 27/255

  Encapsulation PPP, LCP Open

  Open: IPCP

  PPPoATM vaccess, cloned from Dialer1

  Vaccess status 0x44

  Bound to ATM0 VCD: 1, VPI: 0, VCI: 100, loopback not set

  Keepalive set (10 sec)

  DTR is pulsed for 5 seconds on reset

  Interface is bound to Di1 (Encapsulation PPP)

  Last input 00:00:00, output never, output hang never

  Last clearing of "show interface" counters 16:59:17

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

  Queueing strategy: fifo

  Output queue: 0/40 (size/max)

  5 minute input rate 53000 bits/sec, 8 packets/sec

  5 minute output rate 95000 bits/sec, 13 packets/sec

     103915 packets input, 47891847 bytes, 0 no buffer

     Received 0 broadcasts (0 IP multicasts)

     0 runts, 0 giants, 0 throttles

     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

     101391 packets output, 28163372 bytes, 0 underruns

     0 output errors, 0 collisions, 0 interface resets

     0 unknown protocol drops

     0 output buffer failures, 0 output buffers swapped out

     0 carrier transitions



Router_NZ_R01#show run int di 1

Building configuration...

Current configuration : 515 bytes


interface Dialer1

ip address negotiated

ip access-group in-from-world in

ip access-group out-to-world out

ip nat outside

ip inspect out-to-world out

ip virtual-reassembly in

encapsulation ppp

logging event subif-link-status

dialer pool 1

dialer-group 1

ppp authentication pap chap callin

ppp chap hostname

ppp chap password 7 xxxxxxxxxxxxxxxxxxxxx

ppp pap sent-username password 7 xxxxxxxxxxxxx

no cdp enable

crypto map CRY-MAP-DIALER1



interface ATM0

description ADSL Interface

no ip address

ip mask-reply

ip directed-broadcast

ip flow ingress

no atm ilmi-keepalive

pvc 0/100

  encapsulation aal5mux ppp dialer

  dialer pool-member 1




Hi there,
Configure the vdsl controller and try again after rebooting the router:

conf t
Controller vdsl 0
Operating-mode ! Here you choose the mode that better works.. Not always auto does it

however, in my opinion there are issues with the sp because the attainable rate (upstream) is 0. That is not a good value at all.
The dB are not matching amazing values either.

Hope this helps

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