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[QUOTE][i]最初由 iceswater 發表[/i]
[B]南桃園LSC使用至今也快屆滿一年了
也來說說用到目前為止的感想吧
當初來PCZONE收集一些LSC的相關訊息時
大部分的人都傾向於不建議申裝
無預警斷線、玩GAME會lag暴ping、到了晚上連線速率接近龜速
但是為了擺脫黑Net的荼毒,我還是決定賭賭看了
為什麼說是賭呢,因為比起看電視還不如上網
而且大部分的電視節目都沒什麼營養不如不看
但是裝機除了600元的網路費
還有安裝費、保證金、和3個月第四台收視費用
這些加一加就差不多4千多元,最後還是忍痛申請了
完工之後,感覺用起來並沒有想像中的那麼差
不過的確是會斷訊,但是只是偶爾,印象中到目前為止只有5、6次吧
斷訊時間大約都有4到12個小時之間,算是滿久的
可惜我臉皮薄不夠澳客,連一通電話也沒打
然後到了晚上情況真的就比較慘了,真的是用龜速來形容也不為過
但是白天沒有什麼問題就算了
大約今年年初左右吧,晚上的速度也能維持一定
一直用到現在都沒出啥大問題了
難道是漲價之後有錢建設網路了?
不過最近TP真的是用的太凶了,網頁要開個好幾次實在很... [/B][/QUOTE]
我中原的家用起來就沒你幸運,每個月沒給你幾次斷訊你還真覺得奇蹟耶,
晚上PING IP 沒送幾個TIME OUT該放鞭炮,之前因為這個害我玩ONLINE GAME
一質狂死,現在已經脫離LSC滿久不知改善如何。線再對ADSL還是很滿意。
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[QUOTE][i]最初由 iceswater 發表[/i]
[B] Packets: Sent = 1000, Received = 676, Lost = 324 (32% loss),
Packets: Sent = 1000, Received = 612, Lost = 388 (38% loss),
Packets: Sent = 1000, Received = 709, Lost = 291 (29% loss),[/B][/QUOTE]
您的封包遺失狀況很嚴重, 由於response time 並不差, 所以應該不是客戶數太多的問題, 也應該不是電腦本身的問題. 看起來像是實體線路的品質問題. 如果您可以用[url=http://www.pczone.com.tw/showthread.php?t=124556] docsdiag [/url]看一下訊號值, 或許大家可以再幫您研究看看....
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剛剛再測了一次
Ping statistics for 172.16.1.69:
Packets: Sent = 1000, Received = 766, Lost = 234 (23% loss),
Approximate round trip times in milli-seconds:
Minimum = 12ms, Maximum = 96ms, Average = 21ms
System up time = 0 days 00h 21m 49.00s
IP address.10.2.16.168 = 10.2.16.168
IP address.127.0.0.1 = 127.0.0.1
IP address.192.168.100.1 = 192.168.100.1
Ethernet single-collision errs.1 = 320
Ethernet multiple-collision errs.1 = 160
Ethernet deferred xmits.1 = 12
Downstream channel ID = 11
Downstream channel frequency = 681000000 Hz
Downstream received signal power = -2.2 dBmV
Upstream channel ID = 4
Upstream channel frequency = 26250000 Hz
Upstream timing offset = 5125 units of (6.25/64) microseconds
QoS max upstream bandwidth = 384000 bps
QoS max downstream bandwidth = 2000000 bps
SigQu: received without error = 41303751 codewords
SigQu: correctable errors = 0 codewords
SigQu: uncorrectable errors = 0 codewords
SigQu: Signal to Noise Ratio = 37.7 dB
SigQu: microreflections = 33 dBc
Cable modem status = Operational
Upstream transmit signal power = 38.0 dBmV
Number of interface resets = 0
Downstream sync losses = 0
Invalid MAP msgs received = 0
Invalid UCD msgs received = 0
Invalid Ranging Responses rcvd = 0
Invalid Registration Resps rcvd = 0
T1 timer expiries = 0
T2 timer expiries = 0
T3 timer expiries = 12
T4 timer expiries = 0
Ranging Aborts = 0
Tx mini-slots used (contended).7456 = 0
Tx mini-slots used (dedicated).7456 = 151729
Tx data re-tries.7456 = 0
Tx data retry limit exceeded.7456 = 0
Tx bandwidth req retries.7456 = 2112
Tx bw req retry lim exceeded.7456 = 0
Date and Time = 2004-07-02,14:16:12.0
Configuration filename = Moto51D1500U384C1Upgrade.cfg
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[QUOTE][i]最初由 iceswater 發表[/i]
[B]剛剛再測了一次
Packets: Sent = 1000, Received = 766, Lost = 234 (23% loss),
[/b][/quote]
這個狀況真是很糟糕, 不過很奇怪的:
[quote][b]
System up time = 0 days 00h 21m 49.00s
Ethernet single-collision errs.1 = 320
Ethernet multiple-collision errs.1 = 160
Ethernet deferred xmits.1 = 12
Downstream received signal power = -2.2 dBmV
SigQu: received without error = 41303751 codewords
SigQu: correctable errors = 0 codewords
SigQu: uncorrectable errors = 0 codewords
SigQu: Signal to Noise Ratio = 37.7 dB
SigQu: microreflections = 33 dBc
Upstream transmit signal power = 38.0 dBmV
T1 timer expiries = 0
T2 timer expiries = 0
T3 timer expiries = 12
[/B][/QUOTE]
您的實體訊號看起來都還不錯, 只是有幾次 T3 Timeout, 但從信號值上判斷不出關聯性. 頂多是 microreflections 高了一些 (通常應該 10 幾比較好, 不過這是台灣 Cable 業者普遍的問題)
但是 CM 才開機 21 分鐘, 竟然可以出現好幾百次的 Ethernet Error? 好像您的 PC 與 CM 之間的溝通有些問題....您有沒有試過換網路卡或網路線? 或是將網路卡的多工設定從 Auto 改成 Half-duplex 或 Full-duplex 試試看? 或是在中間插個分享器進去試看看?
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感謝raytracy兄的熱心回應
把Realtek RTL8029換成Intel PRO/100 VE
網路線也一併換過
快速測了一下
Ping statistics for 172.16.1.69:
Packets: Sent = 140, Received = 116, Lost = 24 (17% loss),
Approximate round trip times in milli-seconds:
Minimum = 11ms, Maximum = 52ms, Average = 22ms
System up time = 0 days 00h 05m 38.00s
IP address.10.2.16.168 = 10.2.16.168
IP address.127.0.0.1 = 127.0.0.1
IP address.192.168.100.1 = 192.168.100.1
Ethernet carrier sense xmit errs.1 = 158
Downstream channel ID = 11
Downstream channel frequency = 681000000 Hz
Downstream received signal power = -1.6 dBmV
Upstream channel ID = 4
Upstream channel frequency = 26250000 Hz
Upstream timing offset = 5124 units of (6.25/64) microseconds
QoS max upstream bandwidth = 384000 bps
QoS max downstream bandwidth = 2000000 bps
SigQu: received without error = 10655694 codewords
SigQu: correctable errors = 0 codewords
SigQu: uncorrectable errors = 0 codewords
SigQu: Signal to Noise Ratio = 37.6 dB
SigQu: microreflections = 40 dBc
Cable modem status = Operational
Upstream transmit signal power = 37.8 dBmV
Number of interface resets = 0
Downstream sync losses = 0
Invalid MAP msgs received = 0
Invalid UCD msgs received = 0
Invalid Ranging Responses rcvd = 0
Invalid Registration Resps rcvd = 0
T1 timer expiries = 0
T2 timer expiries = 0
T3 timer expiries = 1
T4 timer expiries = 0
Ranging Aborts = 0
Tx mini-slots used (contended).7650 = 0
Tx mini-slots used (dedicated).7650 = 12232
Tx data re-tries.7650 = 0
Tx data retry limit exceeded.7650 = 0
Tx bandwidth req retries.7650 = 84
Tx bw req retry lim exceeded.7650 = 0
Date and Time = 2004-07-02,15:28:19.0
Configuration filename = Moto51D1500U384C1Upgrade.cfg
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[QUOTE][i]最初由 iceswater 發表[/i]
[B]感謝raytracy兄的熱心回應
把Realtek RTL8029換成Intel PRO/100 VE
Packets: Sent = 140, Received = 116, Lost = 24 (17% loss),
System up time = 0 days 00h 05m 38.00s
Ethernet carrier sense xmit errs.1 = 158
Downstream received signal power = -1.6 dBmV
SigQu: received without error = 10655694 codewords
SigQu: correctable errors = 0 codewords
SigQu: uncorrectable errors = 0 codewords
SigQu: Signal to Noise Ratio = 37.6 dB
SigQu: microreflections = 40 dBc
Upstream transmit signal power = 37.8 dBmV
T1 timer expiries = 0
T2 timer expiries = 0
T3 timer expiries = 1
T4 timer expiries = 0
[/B][/QUOTE]
還是一樣, CM 實體的訊號很好, 但是 Ethernet 短時間就出現一堆 Error. 雖然比先前好一點, 但小弟認為, 您的 CM Ethernet 介面有些狀況, 可能與 PC 網卡之間無法調適. 請試著改變網卡的這個參數: (假設是 XP)
我的電腦 -> 按右鍵選內容 -> 硬體 -> 裝置管理員 -> 網路介面卡 -> (Realtek or Intel) -> 按右鍵選內容 -> 進階
現在應該會出現網卡的進階設定畫面, 請您找一下左邊的選項中, 有沒有一個 Link Speed & Duplex 的選項, 點下去右邊的數值欄會出現 Auto 字樣? 若有的話, 請把 Auto 改掉試試看. 可以先從 10Mbps/Half Duplex 試看看, 找出一個 Error 比較少的設定.
如果有機會的話, 換一條網路線也可試試看. 或是將現有的網路線兩端對調過來接看看.....
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raytracy兄;
根據您的說法,小弟我照著實做一番
發現Error真的變少了
但是網路還是一樣慢到不行
連開個pczone的網頁都要好幾十秒
而且還沒開其他跟網路有關的軟體...
Ping statistics for 172.16.1.69:
Packets: Sent = 1000, Received = 753, Lost = 247 (24% loss),
Approximate round trip times in milli-seconds:
Minimum = 12ms, Maximum = 315ms, Average = 21ms
System up time = 0 days 00h 33m 56.00s
Ethernet alignment errors.1 = 1
Ethernet single-collision errs.1 = 3
Ethernet deferred xmits.1 = 8
Ethernet late collisions.1 = 1
Downstream channel ID = 11
Downstream channel frequency = 681000000 Hz
Downstream received signal power = -2.0 dBmV
Upstream channel ID = 4
Upstream channel frequency = 26250000 Hz
Upstream timing offset = 5120 units of (6.25/64) microseconds
QoS max upstream bandwidth = 384000 bps
QoS max downstream bandwidth = 2000000 bps
SigQu: received without error = 64286594 codewords
SigQu: correctable errors = 0 codewords
SigQu: uncorrectable errors = 0 codewords
SigQu: Signal to Noise Ratio = 37.3 dB
SigQu: microreflections = 40 dBc
Cable modem status = Operational
Upstream transmit signal power = 37.8 dBmV
T1 timer expiries = 0
T2 timer expiries = 0
T3 timer expiries = 4
T4 timer expiries = 0
Ranging Aborts = 0
Tx mini-slots used (contended).1233 = 0
Tx mini-slots used (dedicated).1233 = 131290
Tx data re-tries.1233 = 0
Tx data retry limit exceeded.1233 = 0
Tx bandwidth req retries.1233 = 1744
Tx bw req retry lim exceeded.1233 = 0
Date and Time = 2004-07-02,20:11:55.0
Configuration filename = Moto51D1500U384C1Upgrade.cfg
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可否也請Raytracy 版大幫小弟看一下這個訊號是否正常...
小弟使用南桃園光速...最進真的慢到不行....
以下是用Docsdiag抓出的訊號
<<HW_REV: 3; VENDOR: Motorola Corporation; BOOTR: 2150; SW_REV: SB5100-2.3.1.6-S
CM01-NOSH; MODEL: SB5100>>
System up time = 4 days 19h 41m 51.00s
Downstream channel ID = 11
Downstream channel frequency = 681000000 Hz
Downstream received signal power = -5.8 dBmV
Upstream channel ID = 3
Upstream channel frequency = 33150000 Hz
QoS max upstream bandwidth = 384000 bps
QoS max downstream bandwidth = 2000000 bps
SigQu: Signal to Noise Ratio = 39.6 dB
Cable modem status = Operational
Upstream transmit signal power = 49.0 dBmV
Date and Time = 2004-07-03,15:29:40.0
Configuration filename = Moto51D1500U384C1Upgrade.cfg
不知是否有不正常的地方
[url]http://home.pchome.com.tw/mysite/mmshu/Speed_Test.JPG[/url]
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[QUOTE][i]最初由 mmshu 發表[/i]
[B]可否也請Raytracy 版大幫小弟看一下這個訊號是否正常...[/B][/QUOTE]
這樣看不太出來, 可否請您加上 -v 的參數再讀一次?....
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[QUOTE][i]最初由 iceswater 發表[/i]
[B]raytracy兄;
根據您的說法,小弟我照著實做一番
發現Error真的變少了
但是網路還是一樣慢到不行[/B][/QUOTE]
好, PC <-> CM 之間的問題解決了; 現在剩下比較可疑的, 就是 microreflections 的數值了. 而且現在又增加了許多! 看起來好像會跑來跑去, 通常不應該會這樣的. 這個數值所代表的, 是實體電路上的反射訊號大小, 理應越小越好. 現在有幾種可能:
1. 整條實體電路上出現阻抗不匹配的狀況, 但這很難查, 國內好像還沒聽說有哪家業者, 有能力去測量或監控這個問題.
2. 有新的私接戶出現在同一條電路上. 私接戶施工的品質一定遠低於業者, 只要接頭沒做好, 也有可能出現此問題. 或是私接戶使用的分配器, 放大器, 甚至電視太老舊, 也可能造成此現象. (因為沒有接高通濾波器, 所以無法阻止私接戶家中電器的不良特性反灌回來)
3. 業者本身的電路上, 有某些接頭沒有處理好. 外觀看起來可能是好的, 但裡面有問題. 例如, 接頭外面包覆的防水熱縮套管, 如果長度不足, 很可能因為日曬雨淋, 造成龜裂, 而滲雨水進去. 平時訊號看起來很好, 但水氣干擾時, 若長時間測試, 就會出現問題. 此外, 若熱縮套管使用其他廠牌, 不是用 3M 出產的, 也有可能會這樣.
您的問題必須報修, 請業者來查電路. 但小弟並不很樂觀, 因為上面有些因素是超出業者掌握的範圍之外. 您只要抓住一個重點: [b]用 ping 測試的結果要求業者改善[/b](必要時, 搬出電總的法規來講), 其他問題讓業者自己去傷腦筋. 若一直無法改善, 您可以先要求費用上折扣優待, 以給業者壓力去面對此問題. (to: coolbrother兄, 對不起喔, 您可要辛苦囉...:D)