[ovs-dev] How and when are IP Addresses assigned to the switch interfaces.

[Pynbiang Hadem]

Hi,
I'm still a learner of openvswitch and mininet. Pls help clarify my doubts.
I am running a mininet instance with the following command:mininet at mininet-vm: sudo mn --topo linear,3 --switch ovsk,datapath=user --controller remote
When i run   mininet at mininet-vm:~$ sudo ovs-vsctl show    command, i get the following output:
0b8ed0aa-67ac-4405-af13-70249a7e8a96    Bridge "s1"        Controller "tcp:127.0.0.1:6633"            is_connected: true        Controller "ptcp:6634"        fail_mode: secure        Port "s1-eth2"            Interface "s1-eth2"        Port "s1-eth1"            Interface "s1-eth1"        Port "s1"            Interface "s1"                type: internal    Bridge "s3"    .......
There is no IP information shown for the interfaces "s1-eth1", "s1-eth2" etc. 
Even the dump-flows command does not show any IP Information:
mininet at mininet-vm:~$ sudo ovs-ofctl -O OpenFlow13 dump-flows s1
OFPST_FLOW reply (OF1.3) (xid=0x2): cookie=0x0, duration=1627.369s, table=0, n_packets=28, n_bytes=2668, priority=1           ,in_port=2,dl_dst=fe:7a:37:ab:ce:e5 actions=output:1 cookie=0x0, duration=1627.368s, table=0, n_packets=27, n_bytes=2608, priority=1           ,in_port=1,dl_dst=32:a3:fe:e0:d9:c4 actions=output:2 cookie=0x0, duration=2513.265s, table=0, n_packets=3, n_bytes=218, priority=0 a           ctions=CONTROLLER:65535
However the the ping connectivity was successful with the simple_switch_13  apps from ryu executed as follows:       mininet at mininet-vm:~/ryu/ryu/app$ ryu-manager --verbose simple_switch_13.py
How and When are IPs assigned to the switch interfaces?. ORDoes the whole thing work without IP addresses on the interfaces?. If so, how can i assign IP addresses to the interfaces. I need to use the IP addresses of the interfaces in my controller application.
ThanksHadem.