※ [本文轉錄自 Broad_Band 看板 #1Qh8wWrC ]
大家好，這一、二個月連美國某些 server 的速度變得非常慢，只有幾十 KB，
換了好幾個不同地點的光世代測試都是一樣狀況，
但是透過架設在美國的 VPN 又沒問題。
懷疑 root cause 是中華電信，請問有人知道怎麼回事嗎？
以 kernel.org 為例：
# Hinet 光世代
$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Cloning into 'linux'...
remote: Counting objects: 5898904, done.
remote: Compressing objects: 100% (2734/2734), done.
^Cceiving objects: 0% (1518/5898904), 612.00 KiB | 34.00 KiB/s
# Hinet 光世代 + 美國 VPN
$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Cloning into 'linux'...
remote: Counting objects: 5898904, done.
remote: Compressing objects: 100% (4256/4256), done.
^Cceiving objects: 1% (79350/5898904), 37.97 MiB | 1.02 MiB/s
# 台灣之星 LTE
$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Cloning into 'linux'...
remote: Counting objects: 5898904, done.
remote: Compressing objects: 100% (2734/2734), done.
^Cceiving objects: 0% (13708/5898904), 6.67 MiB | 392.00 KiB/s
# Hinet 光世代
$ traceroute git.kernel.org
traceroute to hkg.git.kernel.org (147.75.42.139), 64 hops max, 52 byte packets
1 router.asus.com (192.168.2.1) 4.353 ms 0.784 ms 0.706 ms
2 h254.s98.ts.hinet.net (168.95.98.254) 8.254 ms 28.059 ms 9.878 ms
3 sipr-3302.hinet.net (168.95.161.14) 7.653 ms 8.847 ms 7.712 ms
4 tpdt-3012.hinet.net (220.128.2.74) 30.318 ms
tpdt-3012.hinet.net (220.128.2.94) 43.064 ms 11.445 ms
5 220-128-25-138.hinet-ip.hinet.net (220.128.25.138) 9.336 ms 8.414 ms
8.633 ms
6 tpdb-3315.hinet.net (220.128.2.13) 10.465 ms 9.006 ms 8.162 ms
7 220-128-6-69.hinet-ip.hinet.net (220.128.6.69) 8.434 ms 7.808 ms
29.059 ms
8 63-218-147-249.static.pccwglobal.net (63.218.147.249) 53.809 ms 38.934
ms 46.416 ms
9 tenge0-0-0-0.br02.tok02.pccwbtn.net (63.218.250.81) 53.612 ms
tenge0-0-0-22.br02.tok02.pccwbtn.net (63.218.250.65) 40.351 ms
tenge0-1-1-2.br02.tok02.pccwbtn.net (63.218.250.49) 133.833 ms
10 63-216-242-70.static.pccwglobal.net (63.216.242.70) 42.692 ms 84.874
ms 48.534 ms
11 ve5.fr4.tyo3.llnw.net (203.77.184.230) 56.946 ms 50.019 ms 46.704 ms
12 tge9-1.fr3.hkg.llnw.net (203.77.188.33) 102.207 ms 98.755 ms 96.796 ms
13 ve5.fr4.hkg.llnw.net (203.77.188.30) 102.708 ms 102.270 ms 102.195 ms
14 111.119.23.81 (111.119.23.81) 153.864 ms * *
15 147.75.42.139 (147.75.42.139) 119.129 ms 92.471 ms 102.336 ms
# Hinet 光世代 + 美國 VPN
$ traceroute git.kernel.org
traceroute to lax.git.kernel.org (147.75.56.137), 64 hops max, 52 byte packets
1 10.148.0.1 (10.148.0.1) 153.518 ms 150.832 ms 146.436 ms
2 104.238.47.1 (104.238.47.1) 159.465 ms 149.106 ms 253.293 ms
3 colo-lax6.as8100.net (96.44.180.101) 157.388 ms 147.035 ms 146.498 ms
4 ge2-7.fr1.lax.llnw.net (206.223.123.123) 147.176 ms 150.346 ms 155.380
ms
5 ve6.fr3.lax.llnw.net (69.28.171.205) 151.017 ms 150.997 ms 156.029 ms
6 68.142.89.167 (68.142.89.167) 166.621 ms 167.670 ms 165.169 ms
7 147.75.56.137 (147.75.56.137) 147.067 ms 150.579 ms 156.247 ms
# 台灣之星 LTE
$ traceroute git.kernel.org
traceroute to hkg.git.kernel.org (147.75.42.139), 64 hops max, 52 byte packets
1 wah7706.zyxel.localhost (192.168.1.1) 81.537 ms 3.289 ms 2.710 ms
2 10.89.128.1 (10.89.128.1) 164.123 ms * 54.164 ms
3 10.11.132.61 (10.11.132.61) 49.974 ms 45.592 ms 102.538 ms
4 10.9.3.25 (10.9.3.25) 55.729 ms 45.766 ms 19.182 ms
5 10.9.3.17 (10.9.3.17) 36.788 ms 61.325 ms 40.552 ms
6 * 10.9.166.41 (10.9.166.41) 58.991 ms 55.130 ms
7 10.9.166.38 (10.9.166.38) 46.395 ms 23.366 ms 77.724 ms
8 202.144.222.114 (202.144.222.114) 56.288 ms
202.144.222.22 (202.144.222.22) 45.337 ms
202.144.222.114 (202.144.222.114) 55.258 ms
9 te0-3-0-7.br01.tap06.pccwbtn.net (63.222.54.113) 45.593 ms 55.271 ms
te0-1-1-0.br01.tap06.pccwbtn.net (63.222.54.21) 51.958 ms
10 hundredge0-3-0-0.br02.hkg12.pccwbtn.net (63.218.174.193) 98.247 ms
99.468 ms 102.577 ms
11 limelight.bundle2.br02.hkg12.pccwbtn.net (63.217.254.154) 102.219 ms
101.584 ms 102.236 ms
12 ve5.fr4.hkg.llnw.net (203.77.188.30) 102.243 ms 101.798 ms 102.310 ms
13 111.119.23.81 (111.119.23.81) 103.325 ms 140.490 ms
111.119.23.79 (111.119.23.79) 102.434 ms
14 147.75.42.139 (147.75.42.139) 90.017 ms 114.970 ms 87.380 ms
※ 引述《zi98btcc (幼斤)》之銘言：
: 下載測速網站位於德國的debian
: http://ftp.de.debian.org/debian-cd/
: a.b.c.d.分別為不同下載者，比較a.b.c.d.的下載如下
: a