On Apr 1, 2013, at 12:25 PM, Hilina Assefa wrote:
> Dear Sir/Madam,
>
> i was wondering if it is possible to get statistic information about the
> network(specially bandwidth of the network and buffer capacity of edge
> opeflow switch ) from end-host.
hi Hila,
this is a task which can be supported by an SDN controller application.
fortunately, it is relatively straight-forward to build an application which
exports this information, allowing it to be read by end-hosts. the controller
stores the results of switches' OFPT_FEATURES_REPLY messages or other collected
data (eg, SNMP, snooped ARP traffic, etc.), and presents the responses via,
say, a REST interface.
challenges arise when you wish to restrict the information different end-hosts
can read, develop useful abstractions or query modes for the end-hosts, or even
allow end-hosts to write controller state, as well as read it. these are
challenges we are examining through our "participatory networking" project at
Brown: http://pane.cs.brown.edu/
let me know if you have any questions about building such a controller
application.
cheers,
Andrew
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