lokuochin wrote:
apple 近期不...(恕刪)
gs2.ww.prod.dl.playstation.net有可能是多cdn混合
主要還是akamai akamai看dns分節點給你的
另外時快時慢可能是你分配到的cdn節點上面還沒有那個檔案的快取在
akamai有時候到edge拉檔案下來速度不太好，有快取之後就沒問題了
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雲1234 wrote:
這些國外業者跟數分...(恕刪)
這些國外業者跟數分（3462）peering都是在香港，不管是pccw,telstra....，不可能移回台灣peering的
你說的pccw telstra 以及pacnet 也有在日本跟hinet peering喔XD
而且telstra超級愛跑去日本POP的... 回來的路由倒是正常
(不過非固定制級別的HiNet 回來都是繞路美國的...HINET這點真的很噁心)
+
稍微擷取了重要的資訊 以下是LeaseWeb 香港結果:
【36.228.0.0/16】:
Path #1: Received by speaker 0
2914 3462, (Received from a RR-client)
Community: 2914:420 (Peer routes) 2914:1408 2914:2401 (jp (Asia)) 2914:3400 (Asia)
Path #2: Received by speaker 0
10026 10026 3462
Community: 10026:1230 10026:1410 10026:32344 10026:40101
Path #3: Received by speaker 0
3491 3462 3462 3462
Community: 3491:4000 3491:4008
Path #4: Received by speaker 0
6453 1239 9680 3462
180.87.112.81 from 180.87.112.81 (66.110.11.78)
Community: 6453:86 6453:1000 6453:1300 6453:1302
放眼望去 不管他在哪裡peer 非固定還是根本沒辦法用了啊
以LeaseWeb的香港機房舉例:
NTT繞日本 日本那條尖峰也塞車
PACNET現在是直連 但常常被切去繞美國/日本
PCCW這個段是繞日本的還被prepend路由導致不優先
TATA繞美國N年了 <-- 其實本來固定制級別以上的網段本來也是繞的 昨天開始非固定制以上改成不繞路了
再來一個網段 【125.230.0.0/16】
Paths: (4 available, best #1)
Path #1: Received by speaker 0
2914 3462, (Received from a RR-client)
Community: 2914:420 (Peer routes) 2914:1408 2914:2401 (jp (Asia)) 2914:3400 (Asia)
Path #2: Received by speaker 0
10026 10026 2914 3462
Community: 10026:1220 10026:1420 10026:32392 10026:40042 10026:65004
Path #3: Received by speaker 0
Not advertised to any peer
3491 3462
Community: 3491:4000 3491:4006
Path #4: Received by speaker 0
6453 1299 9680 3462
180.87.112.81 from 180.87.112.81 (66.110.11.78)
Community: 6453:86 6453:1000 6453:1300 6453:1303
差不多 這個網段PCCW倒是不繞路啦 不過NTT PAC TATA 繼續繞
(PS: PCCW prepend與否原因不在於他是否繞路日本, 根本看數分NOC臉色的)
Telstra(AS4637)就不貼了 SoftLayer香港是有 反正繞AS9680(HINET北美骨幹)
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BGP routing table entry for 205.177.232.0/22, version 33567063
Paths: (2 available, best #2, table default)
Not advertised to any peer
Refresh Epoch 1
17408 9505 3491
Origin IGP, localpref 110, valid, external
rx pathid: 0, tx pathid: 0
Refresh Epoch 1
4637 3491
Origin IGP, localpref 200, valid, external, best
rx pathid: 0, tx pathid: 0x0
#ping 205.177.232.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 205.177.232.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
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$ nslookup gs2.ww.prod.dl.playstation.net
Server: 8.8.8.8
Address: 8.8.8.8#53
Non-authoritative answer:
gs2.ww.prod.dl.playstation.net canonical name = gs2-ww-prod.psn.akadns.net.
gs2-ww-prod.psn.akadns.net canonical name = al01.dl.playstation.net.
al01.dl.playstation.net canonical name = gs2.ww.prod.dl.playstation.net.edgesuite.net.
gs2.ww.prod.dl.playstation.net.edgesuite.net canonical name = playstation4.sony.akadns.net.
playstation4.sony.akadns.net canonical name = a1796.d.akamai.net.
Name: a1796.d.akamai.net
Address: 210.61.248.64
Name: a1796.d.akamai.net
Address: 210.61.248.16
#sh ip bgp 210.61.248.16
BGP routing table entry for 210.61.248.0/23, version 38369551
Paths: (2 available, best #1, table default)
Not advertised to any peer
Refresh Epoch 1
17408 7481 3462 20940 20940
Origin IGP, localpref 260, valid, external, best
rx pathid: 0, tx pathid: 0x0
Refresh Epoch 1
4637 3462 20940 20940
Origin IGP, localpref 200, valid, external
rx pathid: 0, tx pathid: 0
#ping 210.61.248.16
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 210.61.248.16, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/4/5 ms
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