I'm based in the UK and have had a new ADSL line put into a remote site by BT (British Telecom). It is an ADSL 2+ line and I have configured it as A VPN back to our site. All is working but the line is unstable and it goes down for 20 seconds every 20 mins or so, sometimes it is longer or less,quite random, this also happens if I take the VPN config off. I phoned BT and they said they don't support Cisco 877s or 1800s that use the Alcatel chipset and said we should get rid of using Cisco (what!!). Anyway is there a work around, do I need to update my ADSL modem firmware (not sure how you do this) or are they right?
Directory of flash:/
2 -rwx 21910432 Mar 1 2002 00:22:01 +00:00 c870-advipservicesk9-mz.124-24.T8.bin
3 -rwx 660 Jun 11 2013 10:19:32 +01:00 vlan.dat
27611136 bytes total (5693440 bytes free)
Cisco 877 (MPC8272) processor (revision 0x400) with 118784K/12288K bytes of memory.
Processor board ID FGL153224W1
MPC8272 CPU Rev: Part Number 0xC, Mask Number 0x10
4 FastEthernet interfaces
1 ATM interface
128K bytes of non-volatile configuration memory.
28672K bytes of processor board System flash (Intel Strataflash)
sh dsl int atm 0
Alcatel 20190 chipset information
ATU-R (DS) ATU-C (US)
Modem Status: Showtime (DMTDSL_SHOWTIME)
DSL Mode: ITU G.992.5 (ADSL2+) Annex A
ITU STD NUM: 0x03 0x3
Chip Vendor ID: 'STMI' 'TSTC'
Chip Vendor Specific: 0x0000 0x0510
Chip Vendor Country: 0x0F 0xB5
Modem Vendor ID: 'CSCO' 'TSTC'
Modem Vendor Specific: 0x0000 0x5100
Modem Vendor Country: 0xB5 0xB5
Serial Number Near: FGL153224W 877-K9 12.4
Serial Number Far: Chip ID: C196P (1)
DFE BOM: DFE3.0 Annex A (1)
Capacity Used: 100% 100%
Noise Margin: 5.5 dB 5.0 dB
Output Power: 20.5 dBm 12.5 dBm
Attenuation: 36.0 dB 19.0 dB
FEC ES Errors: 758 307359
ES Errors: 3 27923
SES Errors: 1 3272
LOSES Errors: 1 2315
UES Errors: 0 1667
Defect Status: None None
Last Fail Code: None
Watchdog Counter: 0x11
Watchdog Resets: 0
Selftest Result: 0x00
Interrupts: 23720321 (0 spurious)
PHY Access Err: 0
LED Status: ON
LED On Time: 100
LED Off Time: 100
Init FW: init_AMR-3.0.014_no_bist.bin
Operation FW: AMR-3.0.014.bin
FW Source: embedded
FW Version: 3.0.14
DS Channel1 DS Channel0 US Channel1 US Channel0
Speed (kbps): 0 13444 0 804
Cells: 0 10347 0 1445512
Reed-Solomon EC: 0 8991 0 4347917
CRC Errors: 0 3 0 161230
Header Errors: 0 3 0 257708
Total BER: 0E-0 1098E-9
Leakage Average BER: 0E-0 1098E-9
Interleave Delay: 0 8 0 63
ATU-R (DS) ATU-C (US)
Bitswap: enabled enabled
Bitswap success: 0 0
LOM Monitoring : Disabled
Thanks for your time
Solved! Go to Solution.
Do you have a service contract ? I stumbled across this firmware release today
release notes for which are here:
It's specifically intended for deployment at BT.
You need to upgrade the DSL FW to version 0.0.026
The file name will be adsl_alc_20190_0.0.026.bin when downloaded from Cisco however will need to be renamed to
adsl_alc_20190.bin for the router to pick it up.
Easiest way is to use tftp/ftp to get the FW onto the router:
copy tftp flash
(TFTP Server IP)
Do a sh flash to check the FW is in the routers flash and is named correctly. Reload the router and the router will pick up the new FW. Do a sh dsl int atm0 again to show it is using the updated FW.
This FW should improve the noise margin for the DSL connection, so far it has improved around 2000 DSL connections we manage.
Just tried it on a local router:
Init FW: init_AMR-5.0.007.bin
Operation FW: AMR-E-0.0.026.bin
FW Source: external
FW Version: 0.0.26
Will try in on my remote one.