877 and ADSL

[maurogatti]

Hi all,

i'm new with cisco equipment.

I have a 877 ADSL router.

I tried to configure it for my ADSL but it seems it doesn't recognise my carrier.

If I put line cable in another ADSL router it works fine but when I switch it back to my cisco 877 nothing happens. Led CD on front panel still blinks.

Could you help me?

Thank you

RGDS

Mauro

P.S.

These are my ATM0 and Dialer0 config:

ATM0 is initializing, line protocol is down

Hardware is MPC ATMSAR (with Alcatel ADSL Module)

MTU 4470 bytes, sub MTU 4470, BW 4608 Kbit, DLY 80 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ATM, loopback not set

Encapsulation(s): AAL5 AAL2, PVC mode

10 maximum active VCs, 1024 VCs per VP, 0 current VCCs

VC Auto Creation Disabled.

VC idle disconnect time: 300 seconds

Last input never, output never, output hang never

Last clearing of "show interface" counters never

Input queue: 0/224/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: Per VC Queueing

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

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

0 packets input, 0 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

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

0 packets output, 0 bytes, 0 underruns

0 output errors, 0 collisions, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

Dialer0 is up (spoofing), line protocol is up (spoofing)

Hardware is Unknown

Internet address will be negotiated using IPCP

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

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation PPP, loopback not set

Keepalive set (10 sec)

DTR is pulsed for 1 seconds on reset

Last input never, output never, output hang never

Last clearing of "show interface" counters 00:12:53

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

Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops)

Conversations 0/0/16 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

Available Bandwidth 42 kilobits/sec

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

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

0 packets input, 0 bytes

0 packets output, 0 bytes

[N_Martin]

The following config will work with most UK IPS's

interface ATM0

no ip address

no atm ilmi-keepalive

pvc 0/38

encapsulation aal5mux ppp dialer

dialer pool-member 1

!

dsl operating-mode auto

!

interface Dialer1

ip address negotiated

ip nat outside

encapsulation ppp

dialer pool 1

dialer-group 1

no cdp enable

ppp authentication chap callin

ppp chap hostname ADSL_USERNAME

ppp chap password 0 ADSL_PASSWORD

ppp ipcp dns request

[globalnettech]

Hello,

in addition to Neil's post, you also might want to try 'dsl operating-mode ansi-dmt' instead of 'auto', this has been a frequent issue in the past...

HTH,

GNT

[asanti]

ciao mauro, ho aperto un caso al tac questa matina oerch? su un nuovo 877w ho avuto un problema che mi sembra simile. devi aggiornare il firmware. ti giro il link. spero possa esserti di aiuto. adesso il mio sembra funzionare.

Alberto Santi

"From TAC......

There are some bugs for 877 routers in working together with some types of DSLAMs, that weren't in 837 routers.

So please upgrade your Firmware to the newest version (it contains bug fixes), which you can download it from here:

http://www.cisco.com/pcgi-bin/tablebuild.pl/800

(adsl_alc_20190_2_6_4.bin)

"

[alexmacuz]

So beyond upgrading the IOS you also need to upgrade the firware? And which way and to where? Flash:?

I was also told that 877 are not as reliable as 837 and I weekly send ADSL 800 routers all around Europe. Locally there is another guy who is responsible of the ADSL subscription with the local provider and i'd like to send the router already configured.

Is that firware the definitive solution to carrier detection by 877?

Thanks in advance

Alex.

[mark.cronin]

Alex

We have used a lot of 837's are about to start deploying 877's, I am concerned about your comment on reliabilty.

Can you comment further?

Also what IOS are you deploying in to production for this platform

Mark

[mauog]

I solved my issue forcing dsl mode like:

dsl operating-mode ansi-dmt

At the moment I've 12.4 IOS

Regards

Mauro

[jlettinck]

Hi maurogatti,

Since i dont see your line protocol up. Are you sure your dsl signal is present on the line? And do you have adsl over isdn or over pots? The 877 is for analog (pots) and the 876 is for isdn.

Good luck