前幾天拉了一條256/64的ADSL當備用線路(本來備用應該是要選cable,結果不是收視戶不給裝...),
是用PPPoE連線的,用起來是還好,不過測試時發現ping的request time滿高的,
都在7~80ms左右,記得以前用512/64也不過50ms上下?
怎麼下載砍一半會差那麼多啊?
這是半夜三點多測試的:
Ping statistics for 139.175.55.244:
Packets: Sent = 138, Received = 138, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 76ms, Maximum = 93ms, Average = 78ms
Tracing route to dns.seed.net.tw [139.175.55.244]
over a maximum of 30 hops:
1 75 ms 78 ms 78 ms 59-104-163-1.adsl.dynamic.seed.net.tw [59.104.16
3.1]
2 * 77 ms 78 ms 139.175.15.94
3 78 ms 62 ms 78 ms R122-193.seed.net.tw [192.72.122.193]
4 78 ms 78 ms 78 ms R58-153.seed.net.tw [139.175.58.153]
5 78 ms 78 ms 78 ms R56-20.seed.net.tw [139.175.56.20]
6 78 ms 78 ms 78 ms dns.seed.net.tw [139.175.55.244]
Trace complete.
順便提一下,這條256/64用的AR4031C開機連上的速度還真慢,
比AR4031B開機到連上慢了快一倍時間,
而且剛連上時Downstream的SNR Margin是34上下,
然後一分鐘左右就掉到24,還屢試不爽,真奇怪。
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