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ADSL 877W issue. ATM interface keeps dropping

achalante
Level 1
Level 1

Hello,

I have a little problem. I configured an ADSL 877W. After it was plugged in, the dialer interface negotiated its IP address ok, but after a few minutes, the atm interface started flapping. It flapped a couple of times, then i lost the IP address. It never picked up an IP address again. I did a couple of debugs, and i couldnt find any errors. The router was replaced with a netgear router, and it worked fine. I replaced the ADSL 877W with a brand new one, and i still experienced the same issue. Please help. My config is as follows:

EASTERN_REGION#sh run

!

ip cef

ip dhcp excluded-address 192.168.10.1 192.168.10.20

!

ip dhcp pool XXX_POOL

network 192.168.10.0 255.255.255.0

dns-server 192.168.10.1

default-router 192.168.10.1

domain-name fmb.co.uk

!

!

ip domain name yourdomain.com

ip name-server yy.yy.yy.yy

ip name-server xx.xx.xx.xx

!

!

crypto pki trustpoint TP-self-signed-978332037

enrollment selfsigned

subject-name cn=IOS-Self-Signed-Certificate-978332037

revocation-check none

rsakeypair TP-self-signed-978332037

!

!

crypto isakmp policy 10

hash md5

authentication pre-share

crypto isakmp key uqef23fr923fg address xx.xx.xx.xx

!

!

crypto ipsec transform-set headoffice esp-des esp-md5-hmac

!

crypto map headoffice 10 ipsec-isakmp

set peer xx.xx.xx.xx

set transform-set headoffice

match address 101

!

bridge irb

!

!

interface ATM0

no ip address

no ip redirects

no ip unreachables

no ip proxy-arp

ip route-cache flow

no atm ilmi-keepalive

pvc 0/38

encapsulation aal5mux ppp dialer

dialer pool-member 1

!

dsl operating-mode auto

dsl enable-training-log

!

interface FastEthernet0

!

interface FastEthernet1

!

interface FastEthernet2

!

interface FastEthernet3

!

interface Dot11Radio0

no ip address

no ip route-cache cef

no ip route-cache

!

encryption vlan 1 key 1 size 40bit 0 1234567890 transmit-key

encryption vlan 1 mode wep mandatory

!

ssid FMB_WLAN

vlan 1

authentication open

guest-mode

!

world-mode dot11d country GB both

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

!

interface Dot11Radio0.1

encapsulation dot1Q 1 native

no ip route-cache

no snmp trap link-status

bridge-group 1

bridge-group 1 subscriber-loop-control

bridge-group 1 spanning-disabled

bridge-group 1 block-unknown-source

no bridge-group 1 source-learning

no bridge-group 1 unicast-flooding

!

interface Vlan1

no ip address

ip tcp adjust-mss 1452

bridge-group 1

!

interface Dialer1

ip address negotiated

no ip redirects

no ip unreachables

no ip proxy-arp

ip mtu 1492

ip nat outside

ip virtual-reassembly

encapsulation ppp

ip route-cache flow

dialer pool 1

dialer-group 1

no cdp enable

ppp authentication chap pap callin

ppp chap hostname xx.xx.xxxx@lanz.broadband

ppp chap password 0 Change

crypto map headoffice

!

interface BVI1

ip address 192.168.10.1 255.255.255.0

ip nat inside

ip virtual-reassembly

ip tcp adjust-mss 1452

!

ip classless

ip route 0.0.0.0 0.0.0.0 Dialer1

!

ip http server

ip http access-class 23

ip http authentication local

ip http secure-server

ip http timeout-policy idle 60 life 86400 requests 10000

ip nat inside source list 102 interface Dialer1 overload

ip nat inside source route-map nonat interface Dialer1 overload

!

access-list 24 permit xx.xx.xx.xx

access-list 24 permit 192.168.0.0 0.0.255.255

access-list 23 permit xx.xx.xx.xx

access-list 23 permit 192.168.0.0 0.0.255.255

access-list 101 permit ip 192.168.10.0 0.0.0.255 192.168.250.0 0.0.0.255

access-list 102 deny ip 192.168.10.0 0.0.0.255 192.168.250.0 0.0.0.255

access-list 102 permit ip 192.168.10.0 0.0.0.255 any

dialer-list 1 protocol ip permit

route-map nonat permit 10

match ip address 102

!

!

control-plane

!

bridge 1 protocol ieee

bridge 1 route ip

!

line con 0

no modem enable

line aux 0

line vty 0 4

access-class 24 in

privilege level 15

password $$$$$$$

login

transport input telnet ssh

!

scheduler max-task-time 5000

end

18 Replies 18

Dean,

I have same issues with Virgin net in the uk. Someone has suggested using 3-0-39 but you need a Smart Net to get it.

Jacob Samuel
Level 1
Level 1

Hi All

I am experiancing a same kind of scenario with my ADSL Link. In my case the Router is Cisco 2621.The CD LED is coming up for a second and goes down... again after few minits repeat the same.

This issue has started once after the Telco cut our link, normal telephone link, by mistake. After they connect the link back it showing this problem, there is no change on the device. Telco saying that there is no problem from their side and they showed the link working using a normal dsl modem.

yup it is workng with dsl modem but when i return to router atm interface the same issue, CD LED comes up and goes down freequently.

i have treid on the second adsl card, which is spare, on the same router, but the same result.

i am attching the router config and debugs

please check... i believe the problem again at the ISP side only they need to reset the Pots.... please correct if i am wrong on my statement and please help me out to fix the problem

regards

Jacob

Hi,

Apparently the cut and repair of the line have caused a degradation in quality that the WIC-1ADSL is unable to handle.

You can only try upgrading IOS to see if newer ADSL FW can help. It may, or may not.

The current version should be indicated at the beginning of the training log that you have not included.

taherudin
Level 1
Level 1

Hello sir

I am new in cisco gear and i like to lurn cisco wher i am working cisco supplyers and we have many customers for cisco 877w ADSL modem will send me configration how to setup i dont have experiance in CLI command or if can send me screen short of SDM setup will be apreciatable

Thanks

Taher