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Can we send message to controller with a demand to update Flow Table [Mininet]

asked 2014-12-07 00:15:23 -0700

shujakhan gravatar image

Hi, I am new to SDN and I came through this because of my Re-search project. I am using mininet as a network emulator and opendaylight as a controller. What I have to do is: - When an elephant flow (big flow) arrives Switch should send message to controller for routing updates.

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answered 2014-12-08 00:43:38 -0700

If I understand your question correctly, you want to update the flow table in switch to send elephant flow packets to controller so that controller can program some intelligent flow handling for this. Is that correct? I am not sure how easily you can identify elephant flows. Once you are able to identify this using openflow matches, its easier to send the packets to controller. For example, for topology discovery, lldp packets are sent by switch to controller.

Sreenivas

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thanks Sreenivas for your kind reply.. Yes I am required to implement a dynamic load balancing strategy in Data Center topology (Fat Tree Topolgy). It detects elephant flows and update routing tables. unfortunately I am totally new to Mininet and Opendaylight

shujakhan ( 2014-12-08 01:11:40 -0700 )edit

Not sure how much this would help you, I had written this policy forwarding prototype application(http://sreeninet.wordpress.com/2014/01/01/policy-based-forwarding-application/) sometime back where based on some pre-specified criteria, we can select paths in a network dynamically.

Sreenivas ( 2014-12-08 03:23:50 -0700 )edit
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Asked: 2014-12-07 00:15:23 -0700

Seen: 7,097 times

Last updated: Dec 08 '14