How to get DataPathId of switch for a node that has a certain IP Address

[NewToSDNProgram]

Hello,

I would like to kindly ask how via the 2.3.5 SDN Controller API I would be able to get the DataPathId(s) of the switch(es) that are passing packets with a specific source IP Address.

I know that I can get all the nodes with the IP Address by using the NodeService as follows:

Set<Node> nodes = nodeService.getNodes(IpAddress.ip(ipAddress));

Now with the node's NodeLocation I can even get the node's elementId/InterfaceId/DeviceId, but via this information how can i get the swtich(es) DatapathId(s) that are passing packets with this as a source IP Address? I need this information to target the specific switches with FlowMod messages to drop packets with the specified source IP Address. Thanks!

-David

[sdnindia · Accepted solution]

Hello David,

Function call getNodes as below

Set<Node> getNodes(IpAddress ip) which returns all nodes in the domain with a given IP address.

Node has below function which returns the most recent node location(NodeLocation ).

NodeLocation    location()

Again NodeLocation can call a function elementId() which returns DeviceId    and then function toString() can be called .

Finally             static DataPathId    dpid(String spec) will give the dpid i.e. DataPathID

Please let us know if this helps or you still face the issue.

Thanks,

HP SDN Team

[NewToSDNProgram]

Thank you,

Out of curiosity is this documented anywhere in the SDK PDF manual? I would like to read more about how to use the different interfaces and what they mean. 

-David

[sdnindia]

Hello David,

You can find the information in Java API documentation.

Doing a follow up to see if you need any further assistance with respected to the query.

Thanks,

HP SDN Team