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Hmm... little description to my problem above:

The network id that the quantum was complaining above was related to a public network (10.0.0./24 created by devstack by default). So new instances by default get an IP on all public networks (does nova attach VNICs to the instances in propprtion to public networks present? ), and since this network was not associated with any project, I believe thats why quantum didn't know about this network ?

So I worked around this by modifying that public network and assigned it to a temporary project, now the instance launches up but there is a new error that I see in instance's log (previously I was unable to access this log and the instance status would just show an error in the networking task):

ip: SIOCGIFFLAGS: No such device

and with that there is no tap interface in the wireshark either.

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nova-manage network quantum_list :

uuid project priority cidr_v4 , cidr_v6 09d21e3b-c1dd-48cc-a275-35835ce77ce3 temp_project None 10.0.0.0/24 , None a65ec76b-c4ba-4f19-b03f-f9da3f2bb9cf ryu_tenant1 0 11.0.0.0/25 , None

===========================

ifconfig:

br-int Link encap:Ethernet HWaddr 08:00:27:16:d5:09
inet6 addr: fe80::a00:27ff:fe16:d509/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:3865 errors:0 dropped:0 overruns:0 frame:0 TX packets:29 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:963003 (963.0 KB) TX bytes:5616 (5.6 KB)

eth0 Link encap:Ethernet HWaddr 08:00:27:7a:ff:65
inet addr:10.0.3.15 Bcast:10.0.3.255 Mask:255.255.255.0 inet6 addr: fe80::a00:27ff:fe7a:ff65/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:44543 errors:0 dropped:0 overruns:0 frame:0 TX packets:27121 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:48437762 (48.4 MB) TX bytes:3598443 (3.5 MB)

eth1 Link encap:Ethernet HWaddr 08:00:27:16:d5:09
inet6 addr: fe80::a00:27ff:fe16:d509/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:11912 errors:0 dropped:0 overruns:0 frame:0 TX packets:796 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2881210 (2.8 MB) TX bytes:103606 (103.6 KB)

gw-09d21e3b-c1 Link encap:Ethernet HWaddr fa:16:3e:09:e4:8b
inet addr:11.0.0.1 Bcast:11.255.255.255 Mask:255.0.0.0 <=======Note: I set this IP manually (it was 10.0.0./24 earlier) inet6 addr: fe80::f816:3eff:fe09:e48b/64 Scope:Link UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1 RX packets:552 errors:0 dropped:0 overruns:0 frame:0 TX packets:238 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:135665 (135.6 KB) TX bytes:41489 (41.4 KB)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:197692 errors:0 dropped:0 overruns:0 frame:0 TX packets:197692 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:159523785 (159.5 MB) TX bytes:159523785 (159.5 MB)

virbr0 Link encap:Ethernet HWaddr 6a:45:b9:a1:ae:ef
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0

RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

ovs-ofctl show br-int

OFPT_FEATURES_REPLY (xid=0x1): ver:0x1, dpid:000008002716d509 n_tables:1, n_buffers:256 features: capabilities:0x87, actions:0xfff 1(gw-09d21e3b-c1): addr:fa:16:3e:09:e4:8b config: 0 state: 0 3(eth1): addr:08:00:27:16:d5:09 config: 0 state: 0 current: 1GB-FD COPPER AUTO_NEG advertised: 10MB-HD 10MB-FD 100MB-HD 100MB-FD 1GB-FD COPPER AUTO_NEG supported: 10MB-HD 10MB-FD 100MB-HD 100MB-FD 1GB-FD COPPER AUTO_NEG LOCAL(br-int): addr:08:00:27:16:d5:09 config: 0 <================= Note: I did an ifconfig br-int up to change their status state: 0 OFPT_GET_CONFIG_REPLY (xid=0x3): frags=normal miss_send_len=0

Is there something wrong?