PPPoE over ADSL "PPPoE: No session found" error

Unanswered Question
Jul 24th, 2011

Hi all,

I am trying to configure PPPoE over ADSL but the PPPoE session is not coming up. I am receiving the following from PPPoE debug:

Jul  7 23:18:11.691:  padi timer expired

Jul  7 23:18:11.691: Sending PADI: vc=0/38

Jul  7 23:18:11.711: PPPoE 0: I PADO  R:8843.e19d.461b L:0019.5539.28ac 0/38  ATM0/1/0.38

Jul  7 23:18:11.711: PPPoE: No session found

router#show pppoe session

     1 client session

Uniq ID  PPPoE  RemMAC          Port                  Source   VA         State

           SID  LocMAC                                         VA-st

    N/A      0  0000.0000.0000  ATM0/1/0.38           Di1      N/A        PADISNT

                0000.0000.0000  VC:  0/38

interface ATM0/1/0

description ADSL2

no ip address

ip virtual-reassembly

no atm ilmi-keepalive

bundle-enable

!

interface ATM0/1/0.38 point-to-point

atm route-bridged ip

pvc 0/38

  oam-pvc 0

  pppoe-client dial-pool-number 1

!

!

interface Dialer1

ip address negotiated

no ip redirects

no ip proxy-arp

ip mtu 1486

ip virtual-reassembly

encapsulation ppp

ip tcp adjust-mss 1452

dialer pool 1

dialer-group 1

no cdp enable

ppp authentication pap callin

ppp chap hostname hostname

ppp chap password 0 password

ppp pap sent-username hostname password 0 password

ppp ipcp dns request accept

ppp ipcp route default

ppp ipcp address accept

Any idea what the issue might be. Any help would be very much appreciated.

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Peter Paluch Sun, 07/24/2011 - 15:31

Hello Denzil,

No exact idea as to what exactly might be your problem, but let's try starting with removing unnecessary commands and seeing if that has a positive effect:

  • Remove the bundle-enable from your ATM0/1/0 interface
  • Remove the atm route-bridged ip from your ATM0/1/0.38 subinterface

If that does not help please include the full output from the following debugs (activated simultaneously):

debug pppoe errors

debug pppoe events

debug pppoe packets

Thank you!

Best regards,

Peter


denzilstephens Sun, 07/24/2011 - 15:39

Thanks Peter,

I have removed those two lines of config.

This is the full output of the three debug commands:

Jul  7 23:37:35.703:  padi timer expired

Jul  7 23:37:35.703: Sending PADI: vc=0/38

Jul  7 23:37:35.703: pppoe_send_padi:

         00 01 09 00 AA AA 03 00 80 C2 00 07 00 00 FF FF

         FF FF FF FF 00 19 55 39 28 AC 88 63 11 09 00 00 ...

Jul  7 23:37:35.723: PPPoE 0: I PADO  R:8843.e19d.461b L:0019.5539.28ac 0/38  ATM0/1/0.38

         00 19 55 39 28 AC 88 43 E1 9D 46 1B 88 63 11 07

         00 00 00 70 01 05 00 38 00 00 0D E9 01 19 74 ...

Jul  7 23:37:35.723: PPPoE: No session found

Peter Paluch Sun, 07/24/2011 - 15:53

Denzil,

Hmm, that's strange. What is the exact router's type and IOS version please? Do you have another ADSL modem/router to try to connect to the very same line and see whether it is able to connect successfully?

Best regards,

Peter

denzilstephens Sun, 07/24/2011 - 16:04

c1841-advipservicesk9-mz.124-24.T5.bin

HWIC-1ADSL-M

I have also run debug on the core router and receive:

Jul 24 22:59:40.533: PPPoE 0: I PADI  R:0019.5539.28ac L:ffff.ffff.ffff 600 Gi0/0.600

Jul 24 22:59:40.533:  Service tag: NULL Tag

Jul 24 22:59:40.533: PPPoE 0: O PADO, R:8843.e19d.461b L:0019.5539.28ac 600 Gi0/0.600

Jul 24 22:59:40.533:  Service tag: NULL Tag

I am also starting to wonder if the hardware/IOS don't work together.

Many thanks again Peter

Peter Paluch Sun, 07/24/2011 - 16:34

Hello Denzil,

Do you have an option of capturing the traffic exchanged between the 1841 and your core router? Having a close look at the PPPoE packets could reveal more what is going on. The debugs use only abbreviated output which does not contain the entire packet contents.

Best regards,

Peter

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