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M-net ADSL settings and Cisco 837 router

Toytown Germany > Discussion forum > Germany-wide > Telecoms and TV

CJay

Jul 21 2006, 10:56 am

Hi

I'm trying to get an M-net ADSL line working with a Cisco 837 router without luck, the ATM interface on the router will not come up. Can someone confirm the PVC and encapsulation type (Mnet advised 1/32 and encap aal5snap) that I should be using, they are refusing to support me because I'm not using their modem. Config and errors below:

QUOTE

interface ATM0
no ip address
no ip mroute-cache
no atm ilmi-keepalive
dsl operating-mode auto
!
interface ATM0.1 point-to-point
ip address x.x.x.x 255.255.255.0
no snmp trap link-status
crypto map VPN
pvc 1/32
encapsulation aal5snap

QUOTE

*Mar 3 19:51:31.047: DSL: Could not establish connection
*Mar 3 19:51:34.047: DSL: Trying to bring up DSL line using Embedded firmware version : 3.9.220
*Mar 3 19:51:34.047: DSL: Send ADSL_OPEN command.
*Mar 3 19:51:34.047: DSL: Using subfunction 0x15
*Mar 3 19:51:34.047: DSL: Using subfunction 0x15
*Mar 3 19:51:34.047: LOCAL:Max noise margin for power cutoff 31
*Mar 3 19:51:34.047: DSL: Sent command 0x3

Any help appreciated!

CJ

Darkknight

Jul 21 2006, 11:02 am

Do you have ISDN Or Analog? From what i remember the 837 only supports ADSL over POTS (Analog)

CJay

Jul 21 2006, 11:45 am

Yep, its ADSL over POTS.

Cheers

CJ

YorkshireLad6

Jul 21 2006, 12:05 pm

PVC 1/32 would seem reasonable (it's pretty standard now) but I'm surprised they suggested aal5snap (RFC1483) for the encapsulation. I would have thought it would have been ppp (RFC2364)

YL6

CJay

Jul 21 2006, 3:19 pm

In my experience, AAL5SNAP (LLC/SNAP) is the common interface encapsulation type when you're talking about DSL, I'll try setting up a dialer interface with PPP instead of an ATM subinterface.

CJ

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