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Low Quality & Packet Drops On DSL ATM

Hello,

I have a scenario with DSL line connected to HWIC-1ADSL-M card, I am facing some packet drops (WAN-to-WAN ping tests) and very low bandwidth. The provider already checked the line and saw no issues in it (but I am still doubtful about that). I am also getting the below error on the router, is there any way to conclude from the below outputs any problem with the HWIC card...?

Sep 24 07:30:55.582: (ATM0/0/0): CRC error in rcvPakFrame, vcd = 1, pkt len = 480, num of cells = 10, buf_addr = 0xE031AC0, vpivci = 0x23, w3 = 0xED992929, w4 = 0x7C80B20A

Sep 24 06:19:10.033: ATM0/0/0 dslsar_ng_periodic Could not get the atm_vc_info_t, vcd=14

I have the below configuration:

!

interface ATM0/0/0

bandwidth 1000

no ip address

no ip redirects

no ip unreachables

no ip proxy-arp

no atm ilmi-keepalive

!

!

interface ATM0/0/0.1 point-to-point

description ---

mtu 1500

bandwidth 1000

ip address ---

ip access-group 5 out

no ip redirects

no ip unreachables

no ip proxy-arp

atm route-bridged ip

pvc 0/35

  encapsulation aal5snap

!

------------------ show dsl interface ------------------

ATM0/0/0

Alcatel 20190 chipset information

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

Modem Status:    Showtime (DMTDSL_SHOWTIME)

DSL Mode:        ANSI T1.413

ANSI Issue/rev:  2/1                             2/1

Vendor ID:       0x003A                          0x0054

Chip ID:         C196 (3) capability-enabled

DFE BOM:         DFE3.0 Annex M (3)

Capacity Used:   51%                             28%

Noise Margin:    13.0 dB                         27.0 dB

Output Power:    15.0 dBm                        11.5 dBm

Attenuation:     67.0 dB                         31.5 dB

FEC ES Errors:    0                               0

ES Errors:       235                              8

SES Errors:       0                               0

LOSES Errors:     0                               0

UES Errors:       0                               0

Defect Status:   None                            None                       

Last Fail Code:  None

Watchdog Counter: 0xBF

Watchdog Resets: 0

Selftest Result: 0x00

Subfunction:     0x00

Interrupts:      107129 (0 spurious)

PHY Access Err:  0

Activations:     10

LED Status:      OFF

LED On Time:     0

LED Off Time:    0

Init FW:         init_AMR-4.0.015_no_bist.bin

Operation FW:    AMR-4.0.015.bin

FW Source:       embedded

FW Version:      4.0.15

                 Interleave             Fast    Interleave              Fast

Speed (kbps):           512                0           128                 0

Cells:               292116                0        592427                 0

Reed-Solomon EC:       7834                0             0                 0

CRC Errors:               7                0             1                 0

Header Errors:            4                0             0                 0

Total BER:                1302E-9                0E-0

Leakage Average BER:      1302E-9                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 0 0 2 3 4 4 4 4 4 4

010: 0 3 3 3 3 3 3 2 2 2 2 2 2 2 2 0

020: 0 2 2 2 3 2 3 3 3 3 4 4 4 4 4 3

030: 3 4 3 3 2 2 2 0 0 0 2 2 4 4 4 4

040: 0 5 3 3 3 0 2 4 2 4 4 4 4 3 3 3

050: 3 3 3 2 2 4 4 3 2 3 3 3 2 2 3 2

060: 3 3 0 0 0 0 2 2 2 0 0 0 0 0 0 0

070: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

080: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

090: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0A0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0B0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0C0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

0D0: 0 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 0 0 0 0 0 0 0

0F0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

DSL: Training log buffer capability is not enabled

------------------ show interfaces ------------------

ATM0/0/0 is up, line protocol is up

  Hardware is HWIC-DSLSAR (with Alcatel ADSL Module), address is 8843.e116.ef43 (bia 8843.e116.ef43)

  MTU 4470 bytes, sub MTU 4470, BW 1000 Kbit/sec, DLY 4000 usec,

     reliability 255/255, txload 4/255, rxload 8/255

  Encapsulation ATM, loopback not set

  Keepalive not supported

  Encapsulation(s): AAL5

  23 maximum active VCs, 256 VCs per VP, 1 current VCCs

  VC Auto Creation Disabled.

  VC idle disconnect time: 300 seconds

  Last input 00:00:04, output 00:00:00, output hang never

  Last clearing of "show interface" counters never

  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 4893

  Queueing strategy: Per VC Queueing

  5 minute input rate 32000 bits/sec, 10 packets/sec

  5 minute output rate 18000 bits/sec, 9 packets/sec

     1130915 packets input, 451271319 bytes, 0 no buffer

     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

     0 input errors, 59 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

     1144273 packets output, 245094560 bytes, 0 underruns

     0 output errors, 0 collisions, 9 interface resets

     5123 unknown protocol drops

     0 output buffer failures, 0 output buffers swapped out

ATM0/0/0.1 is up, line protocol is up

  Hardware is HWIC-DSLSAR (with Alcatel ADSL Module), address is 8843.e116.ef43 (bia 8843.e116.ef43)

  Description: ---

  Internet address is 192.168.241.17/24

  MTU 1500 bytes, BW 1000 Kbit/sec, DLY 4000 usec,

     reliability 255/255, txload 4/255, rxload 8/255

  Encapsulation ATM

  Keepalive not supported

     1130917 packets input, 451340905 bytes

     1144274 packets output, 245095236 bytes

     0 OAM cells input, 0 OAM cells output

  AAL5 CRC errors : 0

  AAL5 SAR Timeouts : 0

  AAL5 Oversized SDUs : 0

  ARP type: ARPA, ARP Timeout 04:00:00

  Last clearing of "show interface" counters never

------------------ show version ------------------

Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.0(1)M1, RELEASE SOFTWARE (fc1)

Technical Support: http://www.cisco.com/techsupport

Copyright (c) 1986-2009 by Cisco Systems, Inc.

Compiled Wed 02-Dec-09 15:23 by prod_rel_team

ROM: System Bootstrap, Version 15.0(1r)M1, RELEASE SOFTWARE (fc1)

-- uptime is 2 days, 7 hours, 28 minutes

System returned to ROM by power-on

System restarted at 05:57:39 LEB Wed Sep 21 2011

System image file is "flash:c2900-universalk9-mz.SPA.150-1.M1.bin"

This product contains cryptographic features and is subject to United

States and local country laws governing import, export, transfer and

use. Delivery of Cisco cryptographic products does not imply

third-party authority to import, export, distribute or use encryption.

Importers, exporters, distributors and users are responsible for

compliance with U.S. and local country laws. By using this product you

agree to comply with applicable laws and regulations. If you are unable

to comply with U.S. and local laws, return this product immediately.

A summary of U.S. laws governing Cisco cryptographic products may be found at:

http://www.cisco.com/wwl/export/crypto/tool/stqrg.html

If you require further assistance please contact us by sending email to

export@cisco.com.

Cisco CISCO2911/K9 (revision 1.0) with 475136K/49152K bytes of memory.

3 Gigabit Ethernet interfaces

2 Low-speed serial(sync/async) interfaces

1 ATM interface

1 Virtual Private Network (VPN) Module

2 Voice FXO interfaces

2 Voice FXS interfaces

DRAM configuration is 64 bits wide with parity enabled.

255K bytes of non-volatile configuration memory.

254464K bytes of ATA System CompactFlash 0 (Read/Write)

Let me know if any additional output is needed.

thanks,

E.B:.

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1 REPLY 1
Highlighted
Engager

Low Quality & Packet Drops On DSL ATM

hi EB,

you've got a very high line attentuation. kindly report this again to your SP. you also got CRCs. replace RJ11 and monitor again. if it's still increasing, ask your SP to re-punch or re-terminate the line.