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Replies

857 ADSL Problems

jrofarrell
Level 1
Level 1

I have recently purchased 2 857W boxes and no matter what I try I cannot get the ATM0(ADSL) interface to connect. The site I am testing from currently has an 837 which works fine (2Mb down/512Kb Up, line in the UK).

I have tried various ios images from the first to the most current and the same problem remains.

Any help/ideas would be much appreciated

Thanks in advance

JOF

Output of debug atm events;

*Mar 1 01:07:26.171: DSL: Send ADSL_OPEN command.

*Mar 1 01:07:26.171: DSL(ATM0): Using subfunction 0x0

*Mar 1 01:07:26.171: LOCAL:Max noise margin for power cutoff 31

*Mar 1 01:07:26.171: DSL(ATM0): Sent command 0x3

*Mar 1 01:07:28.671: DSL(ATM0): 1: Modem state = 0x9

*Mar 1 01:07:31.171: DSL(ATM0): 2: Modem state = 0x10

*Mar 1 01:07:33.671: DSL(ATM0): 3: Modem state = 0x10

*Mar 1 01:07:36.171: DSL(ATM0): 4: Modem state = 0x10

*Mar 1 01:07:38.671: DSL(ATM0): 5: Modem state = 0x10

*Mar 1 01:07:40.623: DSL: Received response: 0x22

*Mar 1 01:07:40.623: DSL: Open failed: Error in early non-CRC message or in fir

st CRC-covered message -- retrying

*Mar 1 01:07:40.623: sleep 5 seconds

For some reason the DSLAM returns an 0x22 code during the connection. I assume the DSLAM has sent the code as a 0x10 code has come back.

The Config

Building configuration...

Current configuration : 2947 bytes

!

version 12.3

no service pad

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname yourname

!

boot-start-marker

boot-end-marker

!

logging buffered 51200 warnings

!

username xxx privilege 15 secret xxxx

no aaa new-model

ip subnet-zero

ip dhcp excluded-address 10.10.10.1

!

ip dhcp pool sdm-pool

import all

network 10.10.10.0 255.255.255.248

default-router 10.10.10.1

lease 0 2

!

!

ip cef

no ip domain lookup

ip domain name yourdomain.com

no ftp-server write-enable

!

crypto pki trustpoint TP-self-signed-720084316

subject-name cn=IOS-Self-Signed-Certificate-720084316

revocation-check none

rsakeypair TP-self-signed-720084316

!

!

!

!

!

!

!

interface ATM0

no ip address

no ip mroute-cache

atm vc-per-vp 64

no atm ilmi-keepalive

pvc 0/38

encapsulation aal5mux ppp dialer

dialer pool-member 1

!

dsl operating-mode auto

!

interface FastEthernet0

no ip address

shutdown

no cdp enable

!

interface FastEthernet1

no ip address

shutdown

no cdp enable

!

interface FastEthernet2

no ip address

shutdown

no cdp enable

!

interface FastEthernet3

no ip address

shutdown

no cdp enable

!

interface Dot11Radio0

no ip address

shutdown

speed basic-1.0 basic-2.0 basic-5.5 6.0 9.0 basic-11.0 12.0 18.0 24.0 36.0 48.0

54.0

station-role root

no cdp enable

!

interface Vlan1

description $ETH-SW-LAUNCH$$INTF-INFO-HWIC 4ESW$

ip address 10.10.10.1 255.255.255.248

ip tcp adjust-mss 1452

!

interface Dialer1

ip address negotiated

encapsulation ppp

dialer pool 1

dialer-group 1

no cdp enable

ppp authentication chap

ppp chap hostname abc@abc.com

ppp chap password xxxxxxxxxxxxxxxxxxxxxxxxxx

hold-queue 224 in

!

ip classless

!

ip http server

ip http authentication local

ip http secure-server

ip http timeout-policy idle 600 life 86400 requests 10000

!

no cdp run

!

control-plane

!

!

line con 0

login local

no modem enable

transport preferred all

transport output all

line aux 0

transport preferred all

transport output all

line vty 0 4

privilege level 15

login local

transport preferred all

transport input telnet ssh

transport output all

!

scheduler max-task-time 5000

end

1 Accepted Solution

Accepted Solutions

4nchristie
Level 1
Level 1

We got this sorted (with help from Cisco TAC):

On the 877/1801 (presumably same on 857), we had to say:

int atm0

dsl operating-mode ansi-dmt

instead of:

dsl operating-mode auto

We also need to do a shutdown/no shutdown and sometimes pull the DSL cable if changing this setting.

We're trying to get details from BT of the DSLAM make and firmware version, on the lines where we've seen this problem, to feedback to Cisco.

Regards, Neil, Internet for Business.

View solution in original post

4 Replies 4

smalkeric
Level 6
Level 6

This error is usually related hardware problem and Please verify the encapsulation with the Service Provider as well.

http://www.cisco.com/en/US/products/hw/routers/ps380/products_tech_note09186a0080093e48.shtml

4nchristie
Level 1
Level 1

We got this sorted (with help from Cisco TAC):

On the 877/1801 (presumably same on 857), we had to say:

int atm0

dsl operating-mode ansi-dmt

instead of:

dsl operating-mode auto

We also need to do a shutdown/no shutdown and sometimes pull the DSL cable if changing this setting.

We're trying to get details from BT of the DSLAM make and firmware version, on the lines where we've seen this problem, to feedback to Cisco.

Regards, Neil, Internet for Business.

Thanks for that;

fixed the problem.

Regards

James O'Farrell

dp_durham1
Level 1
Level 1

Had the same issue. Change the dsl operating mode to dsl operating-mode ansi-dmt no auto.

This should get you working.

Regards

Darren