Cat6/Cat6eのUTPを買ってきた
自宅用に UTP (Cat5e) を購入しようと思って家電量販店へ行ったのだけども，もはや Cat5e なんて売ってないんだね．Cat6 が標準，Cat6e が少し高級なポジションで，最高級品として Cat7 が陳列されていた．最近は研究室で Cat5e を自作することが多くて，量販店に買いに行く機会がなかったので衝撃的だった．
Cat6 なんて正直オーバースペックなんだけど，しかたがないので BUFFALO の Cat6_のきしめんケーブル_1m と Cat6e_のケーブル_1m を購入．せっかくなんで iperf で通信速度を測ってみた．
Cat5
/Users/yuyarin% iperf -i 1 -c 10.0.0.2 ------------------------------------------------------------ Client connecting to 10.0.0.2, TCP port 5001 TCP window size: 129 KByte (default) ------------------------------------------------------------ [ 3] local 10.0.0.1 port 58736 connected with 10.0.0.2 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 110 MBytes 926 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 1.0- 2.0 sec 112 MBytes 936 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 2.0- 3.0 sec 111 MBytes 933 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 3.0- 4.0 sec 112 MBytes 936 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 4.0- 5.0 sec 107 MBytes 895 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 5.0- 6.0 sec 111 MBytes 934 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 6.0- 7.0 sec 111 MBytes 932 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 7.0- 8.0 sec 111 MBytes 935 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 8.0- 9.0 sec 112 MBytes 935 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.08 GBytes 930 Mbits/sec
Cat6
/Users/yuyarin% iperf -i 1 -c 10.0.0.2 ------------------------------------------------------------ Client connecting to 10.0.0.2, TCP port 5001 TCP window size: 129 KByte (default) ------------------------------------------------------------ [ 3] local 10.0.0.1 port 58763 connected with 10.0.0.2 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 99.2 MBytes 833 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 1.0- 2.0 sec 105 MBytes 878 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 2.0- 3.0 sec 111 MBytes 930 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 3.0- 4.0 sec 111 MBytes 931 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 4.0- 5.0 sec 111 MBytes 934 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 5.0- 6.0 sec 111 MBytes 933 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 6.0- 7.0 sec 111 MBytes 935 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 7.0- 8.0 sec 106 MBytes 890 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 8.0- 9.0 sec 111 MBytes 935 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.06 GBytes 913 Mbits/sec
Cat6e
/Users/yuyarin% iperf -i 1 -c 10.0.0.2 ------------------------------------------------------------ Client connecting to 10.0.0.2, TCP port 5001 TCP window size: 129 KByte (default) ------------------------------------------------------------ [ 3] local 10.0.0.1 port 58803 connected with 10.0.0.2 port 5001 [ ID] Interval Transfer Bandwidth [ 3] 0.0- 1.0 sec 111 MBytes 928 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 1.0- 2.0 sec 108 MBytes 907 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 2.0- 3.0 sec 111 MBytes 933 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 3.0- 4.0 sec 104 MBytes 871 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 4.0- 5.0 sec 111 MBytes 931 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 5.0- 6.0 sec 110 MBytes 925 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 6.0- 7.0 sec 111 MBytes 932 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 7.0- 8.0 sec 111 MBytes 930 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 8.0- 9.0 sec 111 MBytes 933 Mbits/sec [ ID] Interval Transfer Bandwidth [ 3] 0.0-10.0 sec 1.07 GBytes 921 Mbits/sec
まぁインターフェイスが 1000BASE-T で超近距離だから速度なんて変わらなくて当たり前なんだけどね．
とりあえずわかったのはカテゴリーが上がるにつれてケーブルが抜きにくくなること．MacBook ではそんなに苦労しなかったけど，MacMini から抜くのが大変だった．
そもそもうちは LAN 側のスイッチが Cisco 1812J の FE で，クライアントの接続は Time Capsule から出してる 11n の無線なので悲しいですが 1000BASE-T とか関係ない話です．お金があったら Catalyst 3750G とか Aironet 1142N-P-K9 とかほしい．
ちなみにきしめんケーブルは BUFFALO の商標登録（第４６７１７９７号）．
