【問題】請教 FTTP 10M/2M跟 IP分享器的連線速度問題?





Briian
2007-12-06, 09:48 PM
FTTP 10M/2M跟 IP分享器的連線速度問題?

最近剛接好中華電信的FTTB光纖網路(10M/2M),是透過VDSL從巷口電信箱連進來的,應該是沒超過800M吧,我猜。

光纖剛裝好時,直接用電腦連線速度都正常,可是一通過IP分享器,就開始龜速了,可是卻是龜速的方式卻很怪。連台灣的網站都正常,HINET抓100M檔案都可以到1.2M的速度,可是要抓國外網站的檔案,速度都在10K以下(只有抓國外檔案才這樣,抓台灣的檔案都正常)。

同樣的環境,換成直接接電腦用PPPOE上網就正常(100K以上),一接上IP分享器就10K以下。

真是奇怪說,不知道是否有什麼可以調整的地方? MTU什麼的,那些有效嗎?我的IP分享器是Zywall 2+,請幫忙提供點意見... 感謝...


我用XP直接PPPOE上網是:

TCP options string = 020405a001010402
MTU = 1480
MTU is optimized for Windows XP PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.
MSS = 1440
MSS is optimized for Windows XP PPPoE DSL broadband. If not, consider raising your MTU value.
Default TCP Receive Window (RWIN) = 17280
RWIN Scaling (RFC1323) = 0 bits
Unscaled TCP Receive Window = 17280

RWIN is a multiple of MSS
Other RWIN values that might work well with your current MTU/MSS:
506880 (MSS x 44 * scale factor of 8)
253440 (MSS x 44 * scale factor of 4)
126720 (MSS x 44 * scale factor of 2)
63360 (MSS x 44)
bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 691 kbps (86 KBytes/s) @ 200ms
Your TCP Window limits you to: 276 kbps (35 KBytes/s) @ 500ms
Consider increasing your RWIN value to optimize TCP/IP for broadband.


用IP分享器上網是:
TCP options string = 020405ac01010402
MTU = 1492
MTU is optimized for PPoE DSL broadband. If not, consider raising MTU to 1500 for optimal throughput.
MSS = 1452
MSS is optimized for PPPoE DSL broadband. If not, consider raising your MTU value.
Default TCP Receive Window (RWIN) = 65535
RWIN Scaling (RFC1323) = 0 bits
Unscaled TCP Receive Window = 65535

Note: TCP 1323 Options need to be enabled for RWIN over 2^16 (65535). Windows 9x might also need the MS Vtcp386 fix.
For optimum performance, consider changing RWIN to a multiple of MSS.
Other RWIN values that might work well with your current MTU/MSS:
511104 (MSS x 44 * scale factor of 8)
255552 (MSS x 44 * scale factor of 4)
127776 (MSS x 44 * scale factor of 2)
63888 (MSS x 44)
bandwidth * delay product (Note this is not a speed test):

Your TCP Window limits you to: 2621 kbps (328 KBytes/s) @ 200ms
Your TCP Window limits you to: 1049 kbps (131 KBytes/s) @ 500ms



不知道跟些數據是否有關系? 該調怎樣才OK?

我抓的檔案是:
ftp://dnl-us4.kaspersky-labs.com/trial/registered/3NKDGRXIM7FJ5ZTSIAFW/kis7.0.0.125en.exe

用IP分享器跑5.8K....




billhi
2007-12-06, 09:59 PM
我是直接連沒用IP分享器,下載您提共的檔案速度約4.8KB/S
所以您要不要再檢查看看直接連的速度,應該跟IP分享器無關吧!

Briian
2007-12-06, 11:39 PM
我原本也以為跟IP分享器無關,可是真的速度有差說,可能舉的例子不好,很奇怪的是,原本用 4M/1M的 時候,下載過的檔案速度起來都200K以上,一樣的檔案換用FTTB來下載,反而速度慢到爆.....

fusopada
2007-12-10, 05:11 PM
IP分享器韌體寫的好壞,確實會影響到上下傳之速度
個人使用中8M/640K ADSL 透過IP分享器下載速度200KB/SEC到頂
移除IP分享器後 下載曾飆到4-500KB/SEC左右

ryusian
2007-12-10, 10:00 PM
我是用hinet 10m/2m,但用早期的SAR6104 IP分享器好像只能跑到200K,直接接PC跑可以跑到1000K,是IP分享器沒辦法跑到那麼快嗎?

waiwai
2007-12-10, 10:33 PM
MSS 是 Maximum Segment Size ( header packet not included )

我用 v2104 , ping -f -l 1414 192.168.1.1 時才 Ping 到 reply time.

所以設定在 V2104 的 ppp_mss= 1442 ( 1414 + 28 )

Zywall 2+ 的 IP Share 沒用過, 不予置評

小島大和
2007-12-10, 10:47 PM
以前的ip分享器...是用比較低階的硬體去製作的...
甚至連外的那個port只有10M(有些為了節省成本是這樣設計的...當時網路還沒那麼快)
要換IP分享器才能跑接近全速...""
用軟體IP分享器LINUX之類的效能會更好且幾乎接近全速!

Briian
2007-12-12, 03:02 AM
以前的ip分享器...是用比較低階的硬體去製作的...
甚至連外的那個port只有10M(有些為了節省成本是這樣設計的...當時網路還沒那麼快)
要換IP分享器才能跑接近全速...""
用軟體IP分享器LINUX之類的效能會更好且幾乎接近全速!



有沒推薦的 IP分享器呢? 感謝~