Changes between Version 76 and Version 77 of GENIExperimenter/Tutorials/OpenFlowOVS/DesignSetup
- Timestamp:
- 09/19/15 11:19:10 (9 years ago)
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GENIExperimenter/Tutorials/OpenFlowOVS/DesignSetup
v76 v77 140 140 ==== 2c. `standalone` vs `secure` mode ==== 141 141 142 The !OpenFlow controller is responsible for setting up all flows on the switch, which means that when the controller is not running there should be no packet switching at all. Depending on the setup of your network, such a behavior might not be desired. It might be best that when the controller is down, the switch should default back to being a learning layer 2 switch. In other circumstances however this might be undesirable. In OVS this is a tunable parameter, called `fail-safe-mode` which can be set to the following parameters:142 ''The !OpenFlow controller is responsible for setting up all flows on the switch, which means that when the controller is not running there should be no packet switching at all. Depending on the setup of your network, such a behavior might not be desired. It might be best that when the controller is down, the switch should default back to being a learning layer 2 switch. In other circumstances however this might be undesirable. In OVS this is a tunable parameter, called `fail-safe-mode` which can be set to the following parameters: 143 143 * `standalone` [default]: in this case OVS will take responsibility for forwarding the packets if the controller fails 144 144 * `secure`: in this case only the controller is responsible for forwarding packets, and if the controller is down all packets are dropped. 145 145 146 In OVS when the parameter is not set it falls back to the `standalone` mode. For the purpose of this tutorial we will set the `fail-safe-mode` to `secure`, since we want to be the ones controlling the forwarding. 146 In OVS when the parameter is not set it falls back to the `standalone` mode. For the purpose of this tutorial we will set the `fail-safe-mode` to `secure`, since we want to be the ones controlling the forwarding.'' 147 147 148 148 ----