CAT7のLANケーブル一本で可能 1Gbps->2.5Gbpsへ
以前の記事で紹介したDebian Trixieの代替サーバー
これなんですが、実は、LANのI/Fは2.5Gbps対応でした。確認してみましょう。
nao@ghost:~$ ethtool enp3s0
Settings for enp3s0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
2500baseT/Full
Supported pause frame use: Symmetric
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
2500baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: 1000Mb/s
Duplex: Full
Auto-negotiation: on
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
MDI-X: off (auto)
netlink error: Operation not permitted
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
なので、現在の時点のLink Speedは、1000Mb/sですが、2500BaseT/Fullもサポートされているはずなので、ケーブルをCAT7のものに替えてみましょう。替える前にnet speedを測っておきましょうかね。speedtest-cliとかで検索して、例えば
からインストールします。
root@ghost:~# speedtest --list
Retrieving speedtest.net configuration...
69792) SpaceCore.pro | Premium VPS Hosting (Tokyo, Japan) [9.59 km]
7139) SoftEther Corporation (Tsukuba, Japan) [58.12 km]
64352) Rakuten Mobile, Inc (Sanda, Japan) [418.26 km]
21118) GLBB Japan (Naha, Japan) [1548.89 km]
59387) 浙江电信 (NingBo, China) [1811.08 km]
16204) JSQY (Suzhou, China) [1834.28 km]
59386) 浙江电信 (HangZhou, China) [1914.42 km]
24974) Homeplus (Keelung, Taiwan) [2074.77 km]
73181) RETN (Taipei, Taiwan) [2095.02 km]
38330) Taiwan Mobile (Da'an District, Taiwan) [2097.32 km]
使えるサーバーは日々変化するので、一覧を出して、近そうなところを選んで、
root@ghost:~# speedtest --server 69792
Retrieving speedtest.net configuration...
Testing from xxxx (this.is.masked.byme )...
Retrieving speedtest.net server list...
Retrieving information for the selected server...
Hosted by SpaceCore.pro | Premium VPS Hosting (Tokyo) [9.59 km]: 18.605 ms
Testing download speed................................................................................
Download: 27.07 Mbit/s
Testing upload speed......................................................................................................
Upload: 39.15 Mbit/s芳しくないですね。サーバーを替えましょう。
root@ghost:~# sppedtest --server 7139
-bash: sppedtest: command not found
root@ghost:~# speedtest --server 7139
Retrieving speedtest.net configuration...
Testing from no where (address is masked )...
Retrieving speedtest.net server list...
Retrieving information for the selected server...
Hosted by SoftEther Corporation (Tsukuba) [58.12 km]: 17.621 ms
Testing download speed................................................................................
Download: 587.12 Mbit/s
Testing upload speed......................................................................................................
Upload: 658.59 Mbit/s
それらしい値が出ました。さて、ケーブルをCAT7のものに変更して。
root@ghost:~# ethtool enp3s0
Settings for enp3s0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
2500baseT/Full
Supported pause frame use: Symmetric
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
2500baseT/Full
Advertised pause frame use: Symmetric
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: 2500Mb/s
Duplex: Full
Auto-negotiation: on
Port: Twisted Pair
PHYAD: 0
Transceiver: internal
MDI-X: off (auto)
Supports Wake-on: pumbg
Wake-on: g
Current message level: 0x00000007 (7)
drv probe link
Link detected: yes
Speedは想定通りですね。さて、測ってみましょうか？それらしい結果としては、
root@ghost:~# speedtest --server 14623
Retrieving speedtest.net configuration...
Testing from au one net (175.132.48.122)...
Retrieving speedtest.net server list...
Retrieving information for the selected server...
Hosted by IPA CyberLab (Bunkyo) [12.75 km]: 8.075 ms
Testing download speed................................................................................
Download: 1221.67 Mbit/s
Testing upload speed......................................................................................................
Upload: 1855.80 Mbit/sが得られました。Routerと直結なので、ケーブル一本で増速できます。複数台というと、ハブが必要ですね。
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