BT Datastream and WIC-1ADSL

Unanswered Question

Hi

We have recently deployed BT Datastream ADSL to a number of sites. On the sites with 2825 routers and New WIC-2ADSL-DG all is good. However, at two sites with 3640's and existing WIC-1ADSL cards, the line comes up and we can ping across it, but we cant pass packets bigger than 136bytes and we get incrementing CRC errors. Debug ATM errors gives us

Nov 28 17:28:40: (ATM0/0): CRC error in rcvPakFrame, vcd = 1, pkt len = 144, num of cells = 3, buf_addr = 0xF8000, vpivci = 0x26, w3 = 0x69C8596B, w4 = 0x80012203

sh dsl interface atm0/0

Alcatel 20150 chipset information

ATU-R (DS)ATU-C (US)

Modem Status: Showtime (DMTDSL_SHOWTIME)

DSL Mode: ITU G.992.1 (G.DMT)

ITU STD NUM: 0x01 0x1

Vendor ID: 'ALCB' 'ALCB'

Vendor Specific: 0x0000 0x0000

Vendor Country: 0x00 0x0F

Capacity Used: 82% 90%

Noise Margin: 11.0 dB 9.0 dB

Output Power: 20.0 dBm 12.0 dBm

Attenuation: 21.0 dB 12.0 dB

Defect Status: None None

Last Fail Code: None

Selftest Result: 0x00

Subfunction: 0x15

Interrupts: 6850 (0 spurious)

PHY Access Err: 0

Activations: 15

Init FW: embedded

Operation FW: embedded

SW Version: 3.8131

FW Version: 0x1A04

InterleaveFastInterleaveFast

Speed (kbps): 7616 0 832 0

Reed-Solomon EC: 3 0 3 0

CRC Errors: 0 0 0 0

Header Errors: 0 0 0 0

Bit Errors: 0 0

BER Valid sec: 0 0

BER Invalid sec: 0 0

DMT Bits Per Bin

00: 0 0 0 0 0 0 0 6 7 8 A A B B B B

10: C C B B B B B B B A 9 9 9 9 0 0

20: 0 0 0 0 0 0 3 4 4 5 5 6 7 8 8 8

30: 9 9 9 A A A A A A A A A B B B B

40: 0 B B B B B B B B B B B B B B B

50: B B B B B B B C C C B 2 B B B B

60: C C C B C C C C C C C C C C C C

70: B C B C B B B B B B B B B B B B

80: B B B B B B B B B B B A A B B B

90: B B B B B B B A A A A A A A A A

A0: A A A A A A A A A A A A A A A A

B0: A A A A A A A A A A A 9 A A 9 A

C0: A 9 9 9 9 9 9 9 9 9 9 9 9 9 9 9

D0: 9 9 9 9 9 9 9 9 8 9 9 9 8 8 8 8

E0: 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8

F0: 7 7 7 7 5 5 4 2 2 0 0 0 0 0 0 0

DSL: Training log buffer capability is not enabled

And manuallly setting the MTU doesn't remove this problem. My guess is that this must be some sort of DSLAM incompatibility or that the WIC-1ADSL cards wont support higher traffic rates for ADSL2 (even though we currently have no traffic passing over it). I've found a couple of anecdotal comments indicating this may be the case.

Can anyone confirm whether this is likely to be a problem with WIC-1ADSL cards? If so, is there a wic that will support ADSL2 available for the 3640's? Having to upgrade severals sites to 2800's would be a pain just for DSL.

Thanks in advance.

Ross

I have this problem too.
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owillins Wed, 12/05/2007 - 09:35

enter shutdown interface configuration command followed by the no shutdown interface configuration command on the ATM interface.

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