Cisco 837 router does not connect to ADSL.

[marianodaniel]

Hello! Here again, being one of those annoying people coming with legacy devices that don’t work.

This time, I managed to access my Cisco 837 using a Windows 98 VM. Only problem is, when trying to enter my ADSL username and password (and VPI/VCI) but I get the following error:

Workarounds/Tests/Info:

• The DSL cable is connected and works ok with my other router.
• The only information I do not know for sure, is the VPI/VCI, I got it from a forum for my ISP.
• I have reset the router to factory defaults.

Is there a way to read more detailed logs? Might be the ADSL port broken? I’m at loss 🤷🏻‍

Any help or tips are much appreciated!

[Georg Pauwen]

Hello,

I am not sure what debug commands are available exactly on that router, but try and enable the below:

debug atm arp
debug atm counters
debug atm errors
debug atm events
debug atm oam
debug atm packet
debug atm state

then shut/no shut the ATM interface, and post the output. Something we can work with might show up...

[marianodaniel]

Hello @Georg Pauwen , and thanks for your patience!

Here:

cisco837#debug atm arp
ATM ARP events debugging is on
cisco837#debug atm counters
ATM counters debugging is on
cisco837#debug atm errors  
ATM errors debugging is on
cisco837#debug atm events
ATM events debugging is on
cisco837#debug atm oam   
ATM OAM cells debugging is on
Displaying all ATM oam data
cisco837#debug atm packet
ATM packets debugging is on
Displaying all ATM packets
cisco837#debug atm state 
ATM VC States debugging is on

[Georg Pauwen]

And no output at all after shutting down and re-enabling the ATM interface (and/or the controller) ?

[marianodaniel]

Sorry @Georg Pauwen ! I seem to have hit Send by mistake  whilst I was still performing the tests.

This is a chunk of the debug output (not sure if it gets redirected to a file).

16:02:20: DSL: Received response: 0x22
16:02:20: DSL: Open failed: Error in early non-CRC message or in first CRC-covered message -- retrying
16:02:23: DSL: Trying to bring up DSL line using Embedded firmware version : 3.9.220
16:02:23: DSL: Send ADSL_OPEN command.
16:02:23: DSL: Using subfunction 0x15
16:02:23: DSL: Using subfunction 0x15
16:02:23: LOCAL:Max noise margin for power cutoff 31
16:02:23: DSL: Sent command 0x3
16:02:25: DSL: 1: Modem state = 0x8
16:02:26: DSL: Received response: 0x22
16:02:26: DSL: Open failed: Error in ea



16:02:20: DSL: 2: Modem state = 0x8
16:02:20: DSL: Received response: 0x22
16:02:20: DSL: Open failed: Error in early non-CRC message or in first CRC-covered message -- retrying
16:02:23: DSL: Trying to bring up DSL line using Embedded firmware version : 3.9.220
16:02:23: DSL: Send ADSL_OPEN command.
16:02:23: DSL: Using subfunction 0x15
16:02:23: DSL: Using subfunction 0x15
16:02:23: LOCAL:Max noise margin for power cutoff 31
16:02:23: DSL: Sent command 0x3
16:02:25: DSL: 1: Modem state = 0x8
16:02:26: DSL: Received response: 0x22
16:02:26: DSL: Open failed: Error in early non-CRC message or in first CRC-covered message -- retrying
16:02:29: DSL: Trying to bring up DSL line using Embedded firmware version : 3.9.220
16:02:29: DSL: Send ADSL_OPEN command.
16:02:29: DSL: Using subfunction 0x15
16:02:29: DSL: Using subfunction 0x15
16:02:29: LOCAL:Max noise margin for power cutoff 31
16:02:29: DSL: Sent command 0x3
16:02:32: DSL: 1: Modem state = 0x8
16:02:34: DSL: 2: Modem state = 0x8
16:02:36: DSL: Received response: 0x22
16:02:36: DSL: Open failed: Error in early non-CRC message or in first CRC-covered message -- retrying
16:02:39: DSL: Trying to bring up DSL line using Embedded firmware version : 3.9.220
16:02:39: DSL: Send ADSL_OPEN command.
16:02:39: DSL: Using subfunction 0x15
16:02:39: DSL: Using subfunction 0x15

EDIT: I see you have been helping with a similar error on this thread? https://community.cisco.com/t5/routing/can-t-get-cisco-857-877-1801-to-work-in-uk-sb107-837-1701-ok-atm/td-p/423336  

[Georg Pauwen]

Hello,

the output is useful. Try and change the dsl operating mode, it is currently set to:

dsl operating-mode auto

Check what options are available:

dsl operating-mode ?

And toggle these optons. After changing the option, physically remove and reattach the cable to the router.

[marianodaniel]

Thanks @Georg Pauwen , I tried all these, and after setting the option, I removed and reattached the rj11 ADSL cable, these are the results:

dsl operating-mode ansi-dmt:
16:53:11: DSL: 15: Modem state = 0x8
16:53:13: DSL: 16: Modem state = 0x8
16:53:16: DSL: 17: Modem state = 0x8
16:53:18: DSL: 18: Modem state = 0x8
16:53:21: DSL: 19: Modem state = 0x8
16:53:23: DSL: 20: Modem state = 0x8
16:53:26: DSL: Could not establish connection
16:53:29: DSL: Trying to bring up DSL line using Embedded firmware version : 3.9.220
16:53:29: DSL: Send ADSL_OPEN command.
16:53:29: DSL: Using subfunction 0x15
16:53:29: DSL: Using subfunction 0x15
16:53:29: LOCAL:Max noise margin for power cutoff 31
16:53:29: DSL: Sent command 0x5
16:53:31: DSL: 1: Modem state = 0x8
16:53:34: DSL: 2: Modem state = 0x8
16:53:36: DSL: 3: Modem state = 0x8
16:53:39: DSL: 4: Modem state = 0x8
16:53:41: DSL: 5: Modem state = 0x8
16:53:44: DSL: 6: Modem state = 0x8
16:53:46: DSL: 7: Modem state = 0x8
16:53:49: DSL: 8: Modem state = 0x8

------------------------------------------------------------------------------
dsl operating-mode itu-dmt:
6:55:56: DSL: Send ADSL_OPEN command.
16:55:56: DSL: Using subfunction 0x15
16:55:56: DSL: Using subfunction 0x15
16:55:56: LOCAL:Max noise margin for power cutoff 31
16:55:56: DSL: Sent command 0x6
16:55:59: DSL: 1: Modem state = 0x8
16:56:01: DSL: 2: Modem state = 0x8
16:56:04: DSL: 3: Modem state = 0x8
16:56:06: DSL: 4: Modem state = 0x8
16:56:07: DSL: Received response: 0x22
16:56:07: DSL: Open failed: Error in early non-CRC message or in first CRC-covered message -- retrying
16:56:10: DSL: Trying to bring up DSL line using Embedded firmware version : 3.9.220
16:56:10: DSL: Send ADSL_OPEN command.
16:56:10: DSL: Using subfunction 0x15
16:56:10: DSL: Using subfunction 0x15
16:56:10: LOCAL:Max noise margin for power cutoff 31
16:56:10: DSL: Sent command 0x6
16:56:13: DSL: 1: Modem state = 0x8
16:56:15: DSL: 2: Modem state = 0x8
16:56:15: DSL: Received response: 0x22
16:56:15: DSL: Open failed: Error in early non-CRC message or in first CRC-covered message -- retrying
16:56:18: DSL: Trying to bring up DSL line using Embedded firmware version : 3.9.220
16:56:18: DSL: Send ADSL_OPEN command.
16:56:18: DSL: Using subfunction 0x15
16:56:18: DSL: Using subfunction 0x15
16:56:18: LOCAL:Max noise margin for power cutoff 31
16:56:18: DSL: Sent command 0x6
16:56:21: DSL: 1: Modem state = 0x8


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

Splitterless:
6:57:29: DSL: 1: Modem state = 0x8
16:57:31: DSL: 2: Modem state = 0x8
16:57:33: DSL: Received response: 0x22
16:57:33: DSL: Open failed: Error in early non-CRC message or in first CRC-covered message -- retrying
16:57:36: DSL: Trying to bring up DSL line using Embedded firmware version : 3.9.220
16:57:36: DSL: Send ADSL_OPEN command.
16:57:36: DSL: Using subfunction 0x15
16:57:36: DSL: Using subfunction 0x15
16:57:36: LOCAL:Max noise margin for power cutoff 31
16:57:36: DSL: Sent command 0x7
16:57:39: DSL: 1: Modem state = 0x8
16:57:41: DSL: 2: Modem state = 0x8
16:57:41: DSL: Received response: 0x22
16:57:41: DSL: Open failed: Error in early non-CRC message or in first CRC-covered message -- retrying
16:57:44: DSL: Trying to bring up DSL line using Embedded firmware version : 3.9.220
16:57:44: DSL: Send ADSL_OPEN command.
16:57:44: DSL: Using subfunction 0x15
16:57:44: DSL: Using subfunction 0x15
16:57:44: LOCAL:Max noise margin for power cutoff 31
16:57:44: DSL: Sent command 0x7
16:57:47: DSL: 1: Modem state = 0x8
16:57:48: DSL: Received response: 0x22
16:57:48: DSL: Open failed: Error in early non-CRC message or in first CRC-covered message -- retrying

Taking into accout that my running config shows:

interface Dialer1
 ip address negotiated
 ip mtu 1492 ip nat outside
 ip inspect myfw out
 ip virtual-reassembly
 encapsulation ppp
 ip tcp adjust-mss 1452 dialer pool 1
 dialer remote-name redback
 dialer-group 1
 ppp authentication pap chap callin
 ppp chap hostname 9720461000
 ppp chap password 7 060A0D3659560E0816
 ppp pap sent-username 9720461000 password 7 1215070007130B1539
 ppp ipcp dns request
 ppp ipcp wins request

Should I perhaps play around with the mtu’s? Or maybe it’s because it has the no modem enable option?

[Georg Pauwen]

Hello,

what are your options after:

pvc 0/38
encapsulation ?

One of them is probably 'encapsulation aal5mux ppp dialer'.

Try to toggle the different options.

[marianodaniel]

Thanks @Georg Pauwen , I first negated the previous PVC of 8/35, and then proceeded to load 0/38 and set encapsulation aal5mux ppp dialer . Removed DSL cable and reattached, no success:

(Note: Tested all other alternaties, didn’t make any difference)

18:03:55: DSL: Could not establish connection
18:03:58: DSL: Trying to bring up DSL line using Embedded firmware version : 3.9.220
18:03:58: DSL: Send ADSL_OPEN command.
18:03:58: DSL: Using subfunction 0x15
18:03:58: DSL: Using subfunction 0x15
18:03:58: LOCAL:Max noise margin for power cutoff 31
18:03:58: DSL: Sent command 0x5
18:04:00: DSL: 1: Modem state = 0x8
18:04:03: DSL: 2: Modem state = 0x8
18:04:05: DSL: 3: Modem state = 0x8
18:04:08: DSL: 4: Modem state = 0x8
18:04:10: DSL: 5: Modem state = 0x8
18:04:13: DSL: 6: Modem state = 0x8
18:04:15: DSL: 7: Modem state = 0x8
18:04:18: DSL: 8: Modem state = 0x8
18:04:20: DSL: 9: Modem state = 0x8
18:04:23: DSL: 10: Modem state = 0x8
18:04:25: DSL: 11: Modem state = 0x8
18:04:28: DSL: 12: Modem state = 0x8
18:04:30: DSL: 13: Modem state = 0x8
18:04:33: DSL: 14: Modem state = 0x8
18:04:35: DSL: 15: Modem state = 0x8

[Georg Pauwen]

Well, at least the CRC error is gone. Have you tried all different VPC combinations/dsl operating modes/encapsulations ?

[marianodaniel]

Hello @Georg Pauwen ! I did try all different VPC combinations.

I’m honestly at loss. I wonder.. is there a way to wipe everything out and load a template config?

[JimWicks]

 Is you DSL line actually trained up, if you isse the command "show controller adsl0" and then look at the modem state, it should say "Showtime" once it's trained up (and you'll see the modem train-rates up/down and all the line stats).   If you are not trained up correctly against the DSLAM then all other config-checks are probably not worth the hassle.

There used to be specific DSL firmware versions that were needed for compatibility with various DSLAM vendors and these were available from the software download site on CCO, but those 837's are so old now that I would be surprised if there is still a link available for you to grab the latest image............if you take the last available IOS version for the c837 then the embedded DSL firmware within that should be pretty close to the latest available.

[marianodaniel]

PS: do you think an 887VA-W would work with DSL? I’m looking into playing with Zabbix and maybe dipping my toes in a CCENT. Also need a robust yet affordable router for the home. 

https://www.cisco.com/c/en/us/products/collateral/routers/800-series-routers/data_sheet_c78-613481.html 

[balaji.bandi]

You need to check with provider what they support ADSL / VDSL then based on that decide what model you can buy

Cisco 887VA

Multimode VDSL2/ ADSL2 and 2+ over basic telephone service

[Georg Pauwen]

Hello,

this post is a bit old, so I don't fully recall whay you already tried. Do you have access to the command line, and if so, can you post the output of:

sh run

[marianodaniel]

Hello again @Georg Pauwen , yes and I apologise for the delay! The day of the last post I became a dad, so it’s been a bit hectic for me at home, but overall I didn´t want to let this pass by, mostly because you helped so much, I didn’t want all that help and support go to waste!

Here’s the output of sh run:

cisco837#sh run
Building configuration...

Current configuration : 3486 bytes
!
version 12.4
no service pad
service timestamps debug uptime
service timestamps log uptime
service password-encryption
!
hostname cisco837
!
boot-start-marker
boot-end-marker
!
no logging buffered
enable secret 5 XXXXXXXXXX.
!
no aaa new-model
!
resource policy
!
!
!
no ip dhcp use vrf connected
ip dhcp excluded-address 10.10.10.1
!
ip dhcp pool CLIENT
   import all
   network 10.10.10.0 255.255.255.0
   default-router 10.10.10.1 
   lease 0 2
!
!
ip cef    
ip inspect name myfw cuseeme timeout 3600
ip inspect name myfw ftp timeout 3600
ip inspect name myfw rcmd timeout 3600
ip inspect name myfw realaudio timeout 3600
ip inspect name myfw smtp timeout 3600
ip inspect name myfw tftp timeout 30
ip inspect name myfw udp timeout 15
ip inspect name myfw tcp timeout 3600
ip inspect name myfw h323 timeout 3600
!
!
!
partition flash 2 11 1
!
username CRWS_Sangeetha privilege 15 password 7 XXXXXXX
username cisco837 password 7 XXXXXXX
username CRWS_Giri privilege 15 password 7 XXXXXXX
!
! 
!
!
!
interface Ethernet0
 ip address 10.10.10.1 255.255.255.0
 ip nat inside
 ip virtual-reassembly
 ip tcp adjust-mss 1452
 hold-queue 100 out
!
interface Ethernet2
 no ip address
 shutdown
 hold-queue 100 out
!
interface ATM0
 no ip address
 atm vc-per-vp 64
 no atm ilmi-keepalive
 dsl operating-mode auto
 pvc 8/35 
 !
!
interface FastEthernet1
 duplex auto
 speed auto
!
interface FastEthernet2
 duplex auto
 speed auto
!
interface FastEthernet3
 duplex auto
 speed auto
!
interface FastEthernet4
 duplex auto
 speed auto
!
interface Dialer1
 ip address negotiated
 ip mtu 1492
 ip nat outside
 ip inspect myfw out
 ip virtual-reassembly
 encapsulation ppp
 ip tcp adjust-mss 1452
 dialer pool 1
 dialer remote-name redback
 dialer-group 1
 ppp authentication pap chap callin
 ppp chap hostname 9720461000
 ppp chap password 7 xxxxxxxx
 ppp pap sent-username 9720461000 password 7 xxxxxxx
 ppp ipcp dns request
 ppp ipcp wins request
!
ip route 0.0.0.0 0.0.0.0 Dialer1
!
ip http server
no ip http secure-server
!
ip nat inside source list 102 interface Dialer1 overload
!
access-list 102 permit ip 10.10.10.0 0.0.0.255 any
access-list 111 permit tcp any any eq telnet
access-list 111 permit icmp any any administratively-prohibited
access-list 111 permit icmp any any echo
access-list 111 permit icmp any any echo-reply
access-list 111 permit icmp any any packet-too-big
access-list 111 permit icmp any any time-exceeded
access-list 111 permit icmp any any traceroute
access-list 111 permit icmp any any unreachable
access-list 111 permit udp any eq bootps any eq bootpc
access-list 111 permit udp any eq bootps any eq bootps
access-list 111 permit udp any eq domain any
access-list 111 permit esp any any
access-list 111 permit udp any any eq isakmp
access-list 111 permit udp any any eq 10000
access-list 111 permit tcp any any eq 1723
access-list 111 permit tcp any any eq 139
access-list 111 permit udp any any eq netbios-ns
access-list 111 permit udp any any eq netbios-dgm
access-list 111 permit gre any any
access-list 111 deny   ip any any
access-list 122 deny   tcp any any eq telnet
access-list 122 permit ip any any
dialer-list 1 protocol ip permit
!
!
control-plane
!
!
line con 0
 exec-timeout 120 0
 no modem enable
 stopbits 1
line aux 0
line vty 0 4
 exec-timeout 120 0
 login local
 length 0
!
scheduler max-task-time 5000
end