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
