uso8000k.net

予想通り動かないSTP

root@localhost:~/pox # ./pox.py samples.spanning_tree
POX 0.1.0 (betta) / Copyright 2011-2013 James McCauley, et al.
[core                  ] POX 0.1.0 (betta) is up.
[openflow.of_01        ] [00-ab-94-41-63-00 1] connected
[openflow.of_01        ] [00-ab-7c-6d-c3-00 2] connected
[openflow.of_01        ] [00-ab-8c-38-60-00 3] connected
[openflow.discovery    ] link detected: 00-ab-7c-6d-c3-00.2 -> 00-ab-8c-38-60-00.3
[openflow.discovery    ] link detected: 00-ab-8c-38-60-00.3 -> 00-ab-7c-6d-c3-00.2
[openflow.spanning_tree] 6 ports changed
[openflow.discovery    ] link detected: 00-ab-94-41-63-00.2 -> 00-ab-7c-6d-c3-00.3
[openflow.spanning_tree] 1 ports changed
[openflow.discovery    ] link detected: 00-ab-94-41-63-00.3 -> 00-ab-8c-38-60-00.2
[openflow.spanning_tree] 1 ports changed
[openflow.discovery    ] link detected: 00-ab-7c-6d-c3-00.3 -> 00-ab-94-41-63-00.2
[openflow.spanning_tree] 4 ports changed
[openflow.discovery    ] link detected: 00-ab-8c-38-60-00.2 -> 00-ab-94-41-63-00.3
[openflow.discovery    ] link timeout: 00-ab-94-41-63-00.2 -> 00-ab-7c-6d-c3-00.3
[openflow.spanning_tree] 4 ports changed
[openflow.discovery    ] link detected: 00-ab-94-41-63-00.2 -> 00-ab-7c-6d-c3-00.3
[openflow.spanning_tree] 4 ports changed

// VyattaのインターフェイスをONにして環状に
[forwarding.l2_learning] Same port for packet from 00:ab:71:13:2d:00 -> 00:ab:77:e3:4b:00 on 00-ab-8c-38-60-00.1.  Drop.
[openflow.discovery    ] link detected: 00-ab-94-41-63-00.1 -> 00-ab-8c-38-60-00.1
[openflow.spanning_tree] 2 ports changed
[openflow.discovery    ] link detected: 00-ab-8c-38-60-00.1 -> 00-ab-94-41-63-00.1

VyattaのSTPは802.1Dで動いているわけですが、そのままOVS側で重複検出してポート閉じられてしまった。予想通りというかなんというか、それっぽく動くサンプルですし仕方なし。ただ、それっぽい動作をちゃんと検出できたのでよしとする。

Vyattaの中身

vyatta@vyatta# sh interfaces
 bridge br0 {
     stp true
 }
 ethernet eth0 {
     bridge-group {
         bridge br0
     }
     hw-id 52:54:00:12:34:56
 }
 ethernet eth1 {
     bridge-group {
         bridge br0
     }
 }
 ethernet eth2 {
     bridge-group {
         bridge br0
     }
 }
 ethernet eth4 {
     bridge-group {
         bridge br0
     }
 }
 loopback lo {
 }

これだけ。ところで8月1日のエントリでSPTと書いてしまっているわけですが、レイズナーの見すぎですね。