Salve,
a casa dei miei (Roma centro) è stato pochi giorni fa fatto il passaggio da ADSL a VDSL. Purtroppo sono su linea rigida e dunque nonostante palazzi della strada di fronte arrivino a 200Mbps in download su profilo 35b, loro arrivano a massimo 26Mbps down e 6 up. Ma non è questo il problema.
Il problema (che rende la linea quasi inutilizzabile per cose serie, ad esempio videoconferenze!) è che si verificano timeout frequentissimi (ogni circa 10/15 minuti, altri giorni anche più frequenti). La cosa strana è che sembra che questi timeout siano direttamente correlati al livello di attività in casa. Ho notato che utilizzando applicazioni che usano costantemente parecchia banda (appunto Zoom, Skype, Teams, ecc) i timeout si verificano ancora più spesso (3 minuti).
Questo non succedeva con la ADSL.
Come modem/router stanno utilizzando quello originale della WindTRE (l'Hub).
Potrebbe essere il modem difettoso?
Allego le statistiche della linea (ho notato tantissimi errori FEC interleaved) e grafico ping di questa notte/mattina (come potete vedere di notte quando l'attività è praticamente zero non ci sono timeout, appena aumenta la banda utilizzata si verificano i timeout). Il grafico è stato preso da dispositivo connesso via ethernet.
`===========================================================
VDSL link status: up
Opmode: ITU G.993.2(VDSL2), G.998.4(G.INP)
TPSTC type: 64/65B PTM TC
near-end interleaved channel bit rate: 26504 kbps
near-end fast channel bit rate: 0 kbps
far-end interleaved channel bit rate: 0 kbps
far-end fast channel bit rate: 6450 kbps
near-end FEC error fast: 0
near-end FEC error interleaved: 13191505
near-end CRC error fast: 0
near-end CRC error interleaved: 10793
near-end HEC error fast: 0
near-end HEC error interleaved: 0
far-end FEC error fast: 2749
far-end FEC error interleaved: 0
far-end CRC error fast: 198
far-end CRC error interleaved: 0
far-end HEC error fast: 0
far-end HEC error interleaved: 0
VDSL uptime :14:28, 6 secs
VDSL activetime :0 min, 14 secs
Downstream:
relative capacity occupation: 100%
noise margin downstream: 6.1 dB
output power upstream: 6.9 dbm
attenuation downstream: 20.0 dB
Upstream:
relative capacity occupation: 100%
noise margin upstream: 5.9 dB
output power downstream: 18.5 dbm
attenuation upstream: 4.6 dB
Bit table:
carrier load: number of bits per tone
tone 0- 31: 00 00 00 0a bc cd dd de dd dd dd dd cc cc ba 88
tone 32- 63: 7a aa ab cb bc cc dc cd dd ed ed ee ee fe ee ef
tone 64- 95: ee ee dd de de de de ee dd de fd de ee ef ef fe
tone 96-127: fe ed ed ed ee de dd de ed ee dd dd dd de de dd
tone 128-159: dd dd dd dd dc dd cc dd cd cd cc dd dc cd cd cb
tone 160-191: bb bb cc bb bb bb bc cc bc cb bb cb bb bb bb bb
tone 192-223: bb cb cb bb ab cb ba aa ba aa ab ab ba ba aa aa
tone 224-255: aa aa ab ab aa bb bb bb bb bb bb ba bb ba bb bb
near end itu identification: 26005443434e5c12
far end itu identification: b5004244434dc016
attain upstream: 6451
attain downstream: 30247
VDSL activetime second: 14
VDSL total ativetime second: 14
ATURANSIRev: 0
ATUCANSIRev: 0
ATURANSIStd: 0
ATUCANSIStd: 0
Interleave Depth: 8
atur chan interleave delay: 0
atur chan prev tx rate: 6450 kbps
atur chan curr tx rate: 6450 kbps
atur chan crc block len: 65535
Dsl Standard: VDSL2
Dsl Type: ANNEX_B
VDSL link status: up
showtime
ReceiveBlock: 810690
TransmitBlock: 810690
CellDelin: 0
LinkRetrain: 2
InitErrors: 1
InitTimeouts: 0
LossOfFraming: 0
LOF: 0
ErroredSecs: 1260
SeverelyErroredSecs: 427
near-end FEC error fast: 0
near-end FEC error interleaved: 13191505
near-end CRC error fast: 0
near-end CRC error interleaved: 10793
near-end HEC error fast: 0
near-end HEC error interleaved: 0
far-end FEC error fast: 2749
far-end FEC error interleaved: 0
far-end CRC error fast: 198
far-end CRC error interleaved: 0
far-end HEC error fast: 0
far-end HEC error interleaved: 0
atur chan curr rx blocks: 256441184
atur chan curr tx blocks: 49036656
atur chan curr correct blocks: 0
atur chan curr uncorrect blocks: 1
curdaySt TimeElapsed: 52135
quthour ATUR Chan TimeElapsed: 807
prevdaySt ATUR Chan MoniSecs: 0
ATUR Chan Perf Valid Intervals: 4
ATUR Chan Perf Invalid Intervals: 0
ES downstream: 1260
ES upstream: 52
SES downstream: 427
SES upstream: 19
UAS downstream: 21
UAS upstream: 21
RX BitError Count: 0
TX BitError Count: 0
Quarter hour Start Showtime
quthour ReceiveBlock: 798132
quthour TransmitBlock: 798131
quthour CellDelin: 0
quthour LinkRetrain: 2
quthour InitErrors: 1
quthour InitTimeouts: 0
quthour LossOfFraming: 0
quthour ErroredSecs: 1260
quthour SeverelyErroredSecs: 427
quthour near-end FEC error fast: 0
quthour near-end FEC error interleaved: 13148009
quthour near-end CRC error fast: 0
quthour near-end CRC error interleaved: 10793
quthour near-end HEC error fast: 0
quthour near-end HEC error interleaved: 0
quthour far-end FEC error fast: 2749
quthour far-end FEC error interleaved: 0
quthour far-end CRC error fast: 198
quthour far-end CRC error interleaved: 0
quthour ATUR Chan RxBlocks: 252466256
quthour ATUR Chan TxBlocks: 48276568
quthour ATUR Chan CorrectBlocks: 0
quthour ATUR Chan UnCorrectBlocks: 0
Current day Start Showtime
curdaySt ReceiveBlock: 0
curdaySt TransmitBlock: 0
curdaySt CellDelin: 0
curdaySt LinkRetrain: 0
curdaySt InitErrors: 0
curdaySt InitTimeouts: 0
curdaySt LossOfFraming: 0
curdaySt ErroredSecs: 0
curdaySt SeverelyErroredSecs: 0
curdaySt near-end FEC error fast: 0
curdaySt near-end FEC error interleaved: 0
curdaySt near-end CRC error fast: 0
curdaySt near-end CRC error interleaved: 0
curdaySt near-end HEC error fast: 0
curdaySt near-end HEC error interleaved: 0
curdaySt far-end FEC error fast: 0
curdaySt far-end FEC error interleaved: 0
curdaySt far-end CRC error fast: 0
curdaySt far-end CRC error interleaved: 0
curdaySt ATUR Chan RxBlocks: 0
curdaySt ATUR Chan TxBlocks: 0
curdaySt ATUR Chan CorrectBlocks: 0
curdaySt ATUR Chan UnCorrectBlocks: 0
xDSL link status: up
The most recent previous 1 day Start Showtime
prevdaySt ATUR Chan RxBlocks: 0
prevdaySt ATUR Chan TxBlocks: 0
prevdaySt ATUR Chan CorrectBlocks: 0
prevdaySt ATUR Chan UnCorrectBlocks: 0
VDSL link status: up
Total Showtime
total ReceiveBlock: 0
total TransmitBlock: 0
total CellDelin: 0
total LinkRetrain: 0
total InitErrors: 0
total InitTimeouts: 0
total LossOfFraming: 0
total ErroredSecs: 0
total SeverelyErroredSecs: 0
total near-end FEC error fast: 0
total near-end FEC error interleaved: 13191505
total near-end CRC error fast: 0
total near-end CRC error interleaved: 10793
total near-end HEC error fast: 0
total near-end HEC error interleaved: 0
total far-end FEC error fast: 2749
total far-end FEC error interleaved: 0
total far-end CRC error fast: 198
total far-end CRC error interleaved: 0
total ATUR Chan RxBlocks: 0
total ATUR Chan TxBlocks: 0
total ATUR Chan CorrectBlocks: 0
total ATUR Chan UnCorrectBlocks: 0
total ES downstream: 0
total ES upstream: 0
total SES downstream: 0
total SES upstream: 0
total UAS downstream: 0
total UAS upstream: 0
`
Grazie in anticipo!