Hi again, > - how do I set the IP address of the controller?
You are using Open vSwitch, right? If so, you need to configure your switches via OVSDB (like "ovs-vsctl" command), and Ryu provide some options to use OVSDB. First, it might be the easiest way I guess, you can use the APIs of "ryu.lib.ovs". The usage and arguments are very similar to "ovs-vsctl" command. https://github.com/osrg/ryu/blob/63f81837fd73cc31edbfe9ba6814ae3f38e34a16/ryu/lib/ovs/bridge.py#L133 In this case, you need to set the OVSDB manager address to your OVS before Ryu connect to your switches like; $ ovs-vsctl set-manager "ptcp:6640" Example code: === from ryu.cfg import CONF from ryu.lib.ovs import bridge ovs_bridge = bridge.OVSBridge(CONF, 1, "tcp:127.0.0.1:6640") ovs_bridge.set_controller(["tcp:127.0.0.1:6653"]) === The similar to the first way, the OVSDB Manager library provides the reactive connection to OVS. "reactive" means Ryu will wait for the incoming OVSDB connections from the switch side (on the other hand, "proactive" way is using "ryu.lib.ovs" and it will connect to switches from the controller side) http://ryu.readthedocs.io/en/latest/library_ovsdb_manager.html Example code: === from ryu.services.protocols.ovsdb import api as ovsdb from ryu.services.protocols.ovsdb import event as ovsdb_event class MyApp(app_manager.RyuApp): @set_ev_cls(ovsdb_event.EventNewOVSDBConnection) def handle_new_ovsdb_connection(self, ev): system_id = ev.system_id address = ev.client.address self.logger.info( 'New OVSDB connection from system-id=%s, address=%s', system_id, address) ovsdb.set_controller(self, system_id, "s1", "tcp:127.0.0.1:6633") === The third way, this way might be not answer for your original question tough, Ryu can connect to your switches from the controller side with "--ofp-switch-address-list" option. Example: $ ryu-manager --help ...(snip)... --ofp-switch-address-list OFP_SWITCH_ADDRESS_LIST list of IP address and port pairs (default empty). e.g., "127.0.0.1:6653,[::1]:6653" ...(snip)... Mostly, OVS instances on Mininet will listen on 6653+increment like; mininet> sh ovs-vsctl show c8fb2af7-1088-4f3e-92f7-fc09d20f7d40 Bridge "s1" Controller "tcp:127.0.0.1:6653" Controller "ptcp:6654" # <--- waiting for controller on 6653+1 ...(snip)... Bridge "s2" Controller "tcp:127.0.0.1:6653" Controller "ptcp:6655" # <--- waiting for controller on 6653+2 ...(snip)... > - how do I get the list of the connected switches? Is there a simple api > or do I need to explicitly save the various datapath? Also how do I map > a datapath to the switch name? You can use "ryu.app.ofctl.app" for such purpose. Please refer to the following mail for the usage example. https://www.mail-archive.com/ryu-devel@lists.sourceforge.net/msg09357.html Thanks, Iwase On 2017年12月02日 01:41, Alessandro Gaballo wrote:
Hi, I have 2 questions: - how do I set the IP address of the controller? - how do I get the list of the connected switches? Is there a simple api or do I need to explicitly save the various datapath? Also how do I map a datapath to the switch name? ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Ryu-devel mailing list Ryu-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ryu-devel
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