Cisco 677 and VPI/VCI 8/35

[joe.bennett]

Having moved to Australia recently and brought my 677 with me, I find that Telstra only support 8/35 as PVC on the DSL link. Is there any way to persuade the 677 up there? I found a command along the lines of 'set base count' which possibly gets it to count from a number other than 0, but I can find no documentation or get it to work.

[smalkeric]

The 67x products have preset "base" and "count" variables on the ATM port. The "base" variable is defaulted to zero and the "count" is defaulted to four. It means the default VPI range of 0-3 that you see in CBOS sets the VPI from a value of 0-3 (I know this sounds obvious but bear with me...). You can change the "base" variable to something other than zero and this will allow you to get higher VPI numbers, but they will always show up as 0-3 in CBOS. The actual value of the VPI will be the base + VPI# that you see in CBOS. So, for example, to get a VPI value of 8, you can set the "base" to 8 and use VPI = 0. VPI of 1 would really be 9, VPI 2 would be 10, etc. So try to check if these commands exist/can be used

set nvram add atm wan vpi base = x

set nvram add atm wan vci base = x

[joe.bennett]

That worked fine but now I'm getting HEC errors, It worked fine on a 6400 DSLAM. I've tried changing to ANSI and turning payload scramblong off, any ideas?

29 000:00:20:51 ATM Info Wan0 Up

30 000:00:20:57 ATM Info Wan0 Margin 41 dB, 41 dB previous

31 000:00:20:57 ATM Info Wan0 ATM HEC Error Failure

32 000:00:20:58 ATM Info WAN 0 physical layer is down

33 000:00:20:58 COMMANDER Info WAN 0 physical layer is down

34 000:00:21:30 ATM Info Wan0 1536 Kbps Down, 256 Kbps Up, 41 dB Ma

rgin

35 000:00:21:30 ATM Info Wan0 Up

36 000:00:21:36 ATM Info Wan0 Margin 41 dB, 41 dB previous

37 000:00:21:36 ATM Info Wan0 ATM HEC Error Failure

38 000:00:21:37 ATM Info WAN 0 physical layer is down

39 000:00:21:37 COMMANDER Info WAN 0 physical layer is down

cbos#sh int wan0

wan0 ADSL Physical Port

Line Training

-transmitting R-ACK-REQ signal

Status:

Last Self-Test Result: Not Available

Modem Microcode: 0x3019be70

Configured:

Operational Standard: G.DMT

Trellis Coding: Enabled

Echo Cancellation: Disabled

FDQ Adaptation: Enabled

Rate Adaptation: Normal

Overhead Framing: Mode-3

Bit-Swapping: Disabled

ATM Payload Scrambling: Disabled

PGA-Cutback: 2 dB

Last Line Fault: LOCD (Loss of Cell Delineation)

ATM Statistics:

Interleaved-Path Counters:

HEC errors: 0

LOCD events: 0

Fast-Path Counters:

HEC errors: 0

LOCD events: 0

DSL Statistics:

Superframes: 19

Corrected Superframes: 0

Uncorrected Superframes: 5

LOCD Retrains: 33

LOS Retrains: 0

LOF/RFI Retrains: 0

ES Events: 5

Time Trained (h:m:s) 0:00:00