09-06-2007 08:03 AM - edited 03-03-2019 06:38 PM
Hi,
I'm having a little issue with a router at one of my sites that connects via dual DSL connections. It is a 2610XM router with 2 ADSL WICs installed.
The DSL circuits terminate onto a DS3 that connects directly to a 7206 at my main site.
Both of the DSLs are provisioned through the LEC as 1.5mb down / 1mb up.
I did a show interface atm0/1 this morning and saw that the bandwidth was down to 129k with the delay reading 10,060msec. I shutdown the interface, brought it back up again, and the bandwidth reset to 864k, which is better than 129k, but nowhere near what it should be. Both of the DSL circuits have experienced this issue. The DSL Operating mode is set to Auto, one of the DSLs comes up as ANSI T1.413, the other as ITU G.992.1 (G.DMT). Do you think this is a firmware issue or do you think that the provider needs to fix something with their provisioning?
Thanks.
interface ATM0/1
description DSL#2
no ip address
no ip mroute-cache
no atm ilmi-keepalive
dsl operating-mode auto
!
interface ATM0/1.1 point-to-point
bandwidth 1000
ip address <IP> 255.255.255.252
no ip mroute-cache
delay 320
pvc 0/32
encapsulation aal5snap
>sh dsl int atm0/0
Alcatel 20150 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: 0x0022 0x0022
Capacity Used: 24% 100%
Noise Margin: 29.0 dB 9.0 dB
Output Power: 20.0 dBm 12.0 dBm
Attenuation: 25.0 dB 15.0 dB
Defect Status: None None
Last Fail Code: None
Selftest Result: 0x00
Subfunction: 0x15
Interrupts: 2668 (0 spurious)
PHY Access Err: 0
Activations: 3
Init FW: embedded
Operation FW: embedded
SW Version: 3.8131
FW Version: 0x1A04
Interleave Fast Interleave Fast
Speed (kbps): 1536 0 832 0
Reed-Solomon EC: 0 0 448 0
CRC Errors: 0 0 4 0
Header Errors: 0 0 0 0
Bit Errors: 0 0
BER Valid sec: 8158 0
BER Invalid sec: 0 0
>sh dsl int atm0/0
Alcatel 20150 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: 0x0022 0x0022
Capacity Used: 24% 100%
Noise Margin: 29.0 dB 9.0 dB
Output Power: 20.0 dBm 12.0 dBm
Attenuation: 25.0 dB 15.0 dB
Defect Status: None None
Last Fail Code: None
Selftest Result: 0x00
Subfunction: 0x15
Interrupts: 2668 (0 spurious)
PHY Access Err: 0
Activations: 3
Init FW: embedded
Operation FW: embedded
SW Version: 3.8131
FW Version: 0x1A04
Interleave Fast Interleave Fast
Speed (kbps): 1536 0 832 0
Reed-Solomon EC: 0 0 482 0
CRC Errors: 0 0 4 0
Header Errors: 0 0 0 0
Bit Errors: 0 0
BER Valid sec: 8824 0
BER Invalid sec: 0 0
DMT Bits Per Bin
<Clipped for length>
09-06-2007 08:20 AM
Hi,
which IOS are you using? upgrading to the latest will upgrade the ADSL firmware, that can make the circuit more stable.
The incongruence between ANSI and ITU is strange however, I would check with the provider how things are supposed to work, and hardcode the router per correct standard (dsl operating-mode).
hope this helps, please rate post if it does!
09-06-2007 08:38 AM
IOS is 12.3(17a).
Cisco Internetwork Operating System Software
IOS (tm) C2600 Software (C2600-IS-M), Version 12.3(17a), RELEASE SOFTWARE (fc2)
I will persue both of your suggestions. Thanks, I will post when I know more.
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