Changes between Version 77 and Version 78 of GENIExperimenter/Tutorials/OpenFlowOVS/DesignSetup


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Timestamp:
09/19/15 11:19:56 (9 years ago)
Author:
nriga@bbn.com
Comment:

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  • GENIExperimenter/Tutorials/OpenFlowOVS/DesignSetup

    v77 v78  
    140140==== 2c. `standalone` vs `secure` mode ====
    141141
    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   * `standalone` [default]: in this case OVS will take responsibility for forwarding the packets if the controller fails
    144   * `secure`: in this case only the controller is responsible for forwarding packets, and if the controller is down all packets are dropped.
     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  * `standalone` ''[default]: in this case OVS will take responsibility for forwarding the packets if the controller fails''
     144  * `secure`: ''in this case only the controller is responsible for forwarding packets, and if the controller is down all packets are dropped. ''
    145145
    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.''
    147147 
    148148----