IL COMPUTER BLOG

Per controllare la qualità della linea ADSL di qualsiasi provider Cisco mette a disposizione il seguente comando:

show dsl int atm0

questa la risposta tipo:

router#show dsl int atm0
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:     0×03                            0×2
Vendor ID:       ‘STMI’                          ‘TSTC’
Vendor Specific: 0×0000                          0×0000
Vendor Country:  0x0F                            0xB5
Chip ID:         C196 (0)
DFE BOM:         DFE3.0 Annex A (1)
Capacity Used:   60%                             44%
Noise Margin:    20.5 dB                         24.0 dB
Output Power:    19.0 dBm                        12.5 dBm
Attenuation:     21.0 dB                         10.5 dB
FEC ES Errors:    0                               0
ES Errors:       55                               3
SES Errors:       0                               0
LOSES Errors:     0                               0
UES Errors:       0                               0
Defect Status:   None                            None
Last Fail Code:  None
Watchdog Counter: 0×37
Watchdog Resets: 1
Selftest Result: 0×00
Subfunction:     0×00
Interrupts:      12405 (0 spurious)
PHY Access Err:  0
Activations:     4
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

Header Errors:            0               13             0                 0
Total BER:                0E-0           5595E-11
Leakage Average BER:      0E-0           1230E-13
                        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 0 2 3 4 5 5 5 5
010: 6 5 6 6 6 6 6 6 5 6 5 5 4 2 0 0
020: 0 0 0 0 0 4 5 5 5 6 6 7 7 7 8 8
030: 8 8 8 8 8 8 9 8 8 8 8 8 8 8 8 8
040: 0 8 8 8 8 8 8 8 8 8 8 8 8 8 7 8
050: 7 8 8 2 8 8 7 7 7 8 7 7 7 7 7 7
060: 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
070: 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7 7
080: 7 6 6 5 5 6 6 6 6 6 6 6 6 6 6 6
090: 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6
0A0: 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6
0B0: 6 6 6 5 5 5 5 5 5 5 5 5 5 5 6 5
0C0: 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5
0D0: 5 5 5 5 5 5 5 5 5 5 5 5 5 4 5 5
0E0: 5 5 5 5 4 4 5 4 5 5 4 4 4 4 5 5
0F0: 5 5 5 5 5 5 4 4 5 4 4 5 4 4 5 5

DSL: Training log buffer capability is not enabled
router#

Per quanto riguarda il parametro noise margin questa la tabella:

* 8-13     normale

* 14-22  molto buono

* 23-28  ottimo

Per il parametro Attenuation:

* 40-60  normale

* 30-40  molto buono

* 20-30 ottimo

Dopo ovviamente testare la linea con www.speedtest.net

Per referenza: Connecting Cisco Routers to Service Provider DSL Networks

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