※ 引述《c98406023 (撌思漁撱)》之銘言：
: ※ [本文轉錄自 Gossiping 看板 #1LXhttqU ]
: 作者: takahashikag (奥様は正妻空母) 看板: Gossiping
: 標題: [問卦] 台灣連外頻寬瓶頸
: 時間: Sun Jun 21 21:36:50 2015
: 安安大家好，我是鍵盤工程師，我是想問問看大家對於台灣網路環境的連線瓶頸怎麼看
: 這是我的看觀察啦！我是覺得種花奠信跟嗯吸吸要解釋一下連線瓶頸可以誇張到這樣是怎
: 麼一回事，以遍佈全球，擁有三十五個資料中心的 CloudFlare 來說，在東北亞就有東京
: 、大阪、魔都、香港還有新加坡五個 CDN Data Center，台灣用戶最常使用的應該是日本
: 跟香港的那三個存取點
: 不過香港的網路環境很反常，但是對 CloudFlare 中華電信又很喜歡把它導到香港去，所
: 以就會變成連去香港先繞去日本，反過來連去日本也是先繞去香港，結果就是轉啊轉，卡
: 到瘋
: https://c1.staticflickr.com/1/466/18396221704_3d8956fb91_b.jpg
: 結果你只要掛個日本 VPN 當皇民立刻雞犬升天
: https://c1.staticflickr.com/1/292/18831112298_2b5d7cddce_b.jpg
: 看不懂 Traceroute 沒關係，用 Ping 解釋也可以，大家都打過 CS 吧？Ping 越低越好
: https://c1.staticflickr.com/1/298/18832571979_22d696b0bc_b.jpg
: https://c1.staticflickr.com/1/512/18992543846_d82053a227_b.jpg
: 連外靠種花，開圖都會卡，你我都受害
做了一些調查, 得到的結論應該是 CloudFlare 自己的責任較大
跟日本/台灣的網路業生態有關, 也是美國業者剛剛進亞洲常會遇到的障礙
底下是原始資料, 要說明清楚肯定會是一大篇
1. NTT
Router: Tokyo - JP
Command: show ip bgp 190.93.241.232
BGP routing table entry for 190.93.241.0/24
Versions:
Process bRIB/RIB SendTblVer
Speaker 57950942 57950942
Last Modified: Jun 17 20:19:19.328 for 3d21h
Paths: (4 available, best #1)
Advertised to peers (in unique update groups):
198.64.6.46
Path #1: Received by speaker 0
Advertised to peers (in unique update groups):
198.64.6.46
(64600) 4713 2510 10026 13335 13335 13335, (aggregated by 13335
141.101.76.1)
61.213.162.162 (metric 1000) from 129.250.0.147 (129.250.0.147)
Origin IGP, metric 4294967294, localpref 100, valid, confed-internal,
best, group-best, multipath, import-candidate
Received Path ID 0, Local Path ID 1, version 57950942
Community: 2914:395 2914:2401 2914:3400
2. Sprint(Softbank)
Sprint Source Region: Tokyo, Japan (sl-bb21-tok)
Performing: Show Route
This command has been deprecated: 'show ip bgp ipv4 unicast 190.93.241.232 '
Sun Jun 21 17:56:53.500 UTC
BGP routing table entry for 190.93.241.0/24
Versions:
Process bRIB/RIB SendTblVer
Speaker 367390098 367390098
Last Modified: Nov 29 21:48:28.355 for 29w0d
Paths: (3 available, best #2)
Advertised to update-groups (with more than one peer):
0.5
Advertised to peers (in unique update groups):
144.232.6.146
Path #1: Received by speaker 0
Not advertised to any peer
10026 13335 13335 13335, (aggregated by 13335 103.22.203.1)
203.222.38.1 (metric 501) from 203.222.32.9 (203.222.38.1)
Origin IGP, metric 4294967294, localpref 90, valid, internal
Received Path ID 0, Local Path ID 0, version 0
Community: 1239:666 1239:667 1239:7000 1239:7030 1239:7666
Originator: 203.222.38.1, Cluster list: 0.1.36.248
Path #2: Received by speaker 0
Advertised to update-groups (with more than one peer):
0.5
Advertised to peers (in unique update groups):
144.232.6.146
10026 13335 13335 13335, (aggregated by 13335 103.22.203.1)
203.98.192.50 (metric 306) from 203.222.36.13 (203.98.192.50)
Origin IGP, metric 4294967294, localpref 90, valid, internal, best,
group-best
Received Path ID 0, Local Path ID 1, version 367390098
Community: 1239:666 1239:667 1239:7000 1239:7070 1239:7666
Originator: 203.98.192.50, Cluster list: 0.1.36.248, 0.1.20.44
Path #3: Received by speaker 0
Not advertised to any peer
10026 13335 13335 13335, (aggregated by 13335 103.22.203.1)
203.222.38.1 (metric 501) from 203.222.38.8 (203.222.38.1)
Origin IGP, metric 4294967294, localpref 90, valid, internal
Received Path ID 0, Local Path ID 0, version 0
Community: 1239:666 1239:667 1239:7000 1239:7030 1239:7666
Originator: 203.222.38.1, Cluster list: 0.1.36.248Sprint Source Region: Tokyo, Japan (sl-bb21-tok)
Performing: Show Route
This command has been deprecated: 'show ip bgp ipv4 unicast 190.93.241.232 '
Sun Jun 21 17:56:53.500 UTC
BGP routing table entry for 190.93.241.0/24
Versions:
Process bRIB/RIB SendTblVer
Speaker 367390098 367390098
Last Modified: Nov 29 21:48:28.355 for 29w0d
Paths: (3 available, best #2)
Advertised to update-groups (with more than one peer):
0.5
Advertised to peers (in unique update groups):
144.232.6.146
Path #1: Received by speaker 0
Not advertised to any peer
10026 13335 13335 13335, (aggregated by 13335 103.22.203.1)
203.222.38.1 (metric 501) from 203.222.32.9 (203.222.38.1)
Origin IGP, metric 4294967294, localpref 90, valid, internal
Received Path ID 0, Local Path ID 0, version 0
Community: 1239:666 1239:667 1239:7000 1239:7030 1239:7666
Originator: 203.222.38.1, Cluster list: 0.1.36.248
Path #2: Received by speaker 0
Advertised to update-groups (with more than one peer):
0.5
Advertised to peers (in unique update groups):
144.232.6.146
10026 13335 13335 13335, (aggregated by 13335 103.22.203.1)
203.98.192.50 (metric 306) from 203.222.36.13 (203.98.192.50)
Origin IGP, metric 4294967294, localpref 90, valid, internal, best,
group-best
Received Path ID 0, Local Path ID 1, version 367390098
Community: 1239:666 1239:667 1239:7000 1239:7070 1239:7666
Originator: 203.98.192.50, Cluster list: 0.1.36.248, 0.1.20.44
Path #3: Received by speaker 0
Not advertised to any peer
10026 13335 13335 13335, (aggregated by 13335 103.22.203.1)
203.222.38.1 (metric 501) from 203.222.38.8 (203.222.38.1)
Origin IGP, metric 4294967294, localpref 90, valid, internal
Received Path ID 0, Local Path ID 0, version 0
Community: 1239:666 1239:667 1239:7000 1239:7030 1239:7666
Originator: 203.222.38.1, Cluster list: 0.1.36.248
3. 某日本小型業者
BGP routing table entry for 190.93.241.0/24
Paths: (5 available, best #2, table Default-IP-Routing-Table)
Not advertised to any peer
4725 10026 13335 13335 13335, (aggregated by 13335 141.101.76.1)
203.216.201.1 from 203.216.201.1 (203.216.201.1)
Origin IGP, metric 300, localpref 90, valid, internal
Community: 9607:2011
Last update: Thu Jun 18 05:19:33 2015
24115 13335 13335 13335, (aggregated by 13335 141.101.76.1)
203.190.230.72 from 211.14.3.252 (211.14.3.252)
Origin IGP, metric 0, localpref 100, valid, internal, best
Community: 9607:13 9607:3252 13335:10022 13335:19030 13335:20010
13335:20270 13335:20500 13335:20530 24115:13335
Last update: Thu Jun 18 05:19:04 2015
2516 10026 13335 13335 13335, (aggregated by 13335 141.101.76.1)
203.181.98.33 from 211.14.3.253 (211.14.3.253)
Origin IGP, metric 200, localpref 90, valid, internal
Community: 2516:1050 9607:3253
Last update: Thu Jun 18 05:19:17 2015
24115 13335 13335 13335, (aggregated by 13335 141.101.76.1)
211.14.3.252 from 211.14.3.242 (211.14.3.252)
Origin IGP, metric 0, localpref 100, valid, internal
Community: 9607:13 9607:3252 13335:10022 13335:19030 13335:20010
13335:20270 13335:20500 13335:20530 24115:13335
Originator: 211.14.3.252, Cluster list: 211.14.3.249
Last update: Thu Jun 18 05:19:04 2015
24115 13335 13335 13335, (aggregated by 13335 141.101.76.1)
211.14.3.252 from 203.216.201.2 (211.14.3.252)
Origin IGP, metric 0, localpref 100, valid, internal
Community: 9607:13 9607:3252 13335:10022 13335:19030 13335:20010
13335:20270 13335:20500 13335:20530 24115:13335
Originator: 211.14.3.252, Cluster list: 211.14.3.249
Last update: Thu Jun 18 05:19:04 2015