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ADSL drops 4-5 times a day with Cisco 1801

deanhoy
Level 1
Level 1

Hello

I have had this on going problem with a Cisco 1801. It loses its connection to the ISP about 4-5 times a day. I have looked at other posts and tried the recommendations but it still happens.

Can you help?

1801#sh dsl int atm 0

ATM0

Alcatel 20190 chipset information

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

Modem Status: Showtime (DMTDSL_SHOWTIME)

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

ITU STD NUM: 0x03 0x2

Vendor ID: 'STMI' 'TSTC'

Vendor Specific: 0x0000 0x0000

Vendor Country: 0x0F 0xB5

Chip ID: C196 (0)

DFE BOM: DFE3.0 Annex A (1)

Capacity Used: 100% 53%

Noise Margin: 3.0 dB 23.0 dB

Output Power: 19.5 dBm 12.5 dBm

Attenuation: 48.0 dB 24.0 dB

FEC ES Errors: 0 0

ES Errors: 2883 42

SES Errors: 0 0

LOSES Errors: 0 0

UES Errors: 0 0

Defect Status: None None

Last Fail Code: None

Watchdog Counter: 0xCF

Watchdog Resets: 0

Selftest Result: 0x00

Subfunction: 0x00

Interrupts: 4207 (0 spurious)

PHY Access Err: 0

Activations: 16

LED Status: ON

LED On Time: 100

LED Off Time: 100

Init FW: init_3.0.33_nobist.bin

Operation FW: AMR-3.0.033.bin

FW Source: external

FW Version: 3.0.33

Interleave Fast Interleave Fast

Speed (kbps): 3968 0 448 0

Cells: 19357 0 16389003 0

Reed-Solomon EC: 43465 0 26 0

CRC Errors: 0 0 5 0

Header Errors: 0 0 5 0

Total BER: 0E-0 0E-0

Leakage Average BER: 0E-0 0E-0

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

Bitswap: enabled enabled

Bitswap success: 0 0

Bitswap failure: 0 0

LOM Monitoring : Disabled

DMT Bits Per Bin

000: 0 0 0 0 0 0 2 5 6 7 7 7 8 8 8 8

010: 8 8 7 7 7 7 7 6 6 6 5 5 4 3 0 0

020: 0 0 0 0 0 A A B B B B B B B 8 B

030: B B B B B B B B B B B A B B A A

040: 0 A A A A 2 A A A A A A A A A A

050: A A A A 9 9 9 9 9 A A 9 9 9 9 9

060: A A A A A A A A A 9 A A 9 9 9 9

070: 9 9 9 9 9 9 9 9 9 9 9 7 9 7 8 7

080: 7 4 4 6 7 5 5 5 4 7 5 8 6 8 6 8

090: 5 8 4 7 6 7 6 7 6 7 6 6 6 5 5 4

0A0: 0 0 3 4 5 5 6 0 6 5 5 2 5 4 5 4

0B0: 3 2 2 2 3 4 4 2 2 3 2 2 2 3 3 4

0C0: 0 4 2 4 4 3 2 2 2 2 2 2 2 2 2 2

0D0: 2 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0E0: 0 0 0 0 0 0 0 0 0 2 2 2 2 2 2 0

0F0: 0 0 2 2 0 0 0 0 0 0 0 0 0 0 0 0

DSL: Training log buffer capability is not enabled

sh log

000230: Jan 25 13:13:15.378 UTC: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM0, changed state to down

000231: Jan 25 13:13:37.998 UTC: %LINK-3-UPDOWN: Interface ATM0, changed state to up

3 Replies 3

owillins
Level 6
Level 6

This is bug a bug.

Tracebacks on show dsl int atm0 when ADSL line is flapping.

c1801 show dsl int atm 0 has FW version = 0x0000

Show dsl int atm0 is not updated when atm interface is shut down

paolo bevilacqua
Hall of Fame
Hall of Fame

First of all it seems the line is severely attenuated:

Capacity Used: 100% 53%

Noise Margin: 3.0 dB 23.0 dB

Attenuation: 48.0 dB 24.0 dB

FEC ES Errors: 0 0

ES Errors: 2883 42

If you could have telco select a better pair that would probably help. If you have a support contract, there is newer FW that the one you're using via ftp, under /cisco/access/800. I'm not sure if that would help anyway.

Hello and ty for the reply

I have downloaded and using the latest modem FW.

FW Version: 3.0.33

but this has not helped with the number of drops.

I will contact the telco to see if there is anything they can do to help.

i did try using a basic netgear adsl router between the 10th and 16th and as you can see there were no drops. As soon as i put the cisco back on, it started dropping again. This graph was supplied to me from the ISP.

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