I want to be able to access my instances from the controller node using a floating ip address. Currently, the only way I can access them is with an ip netns exec command ("ip netns exec qdhcp-25743621-9d0a-4c75-acc4-2fe4a3f89e4c ping 172.24.4.228" works, thanks to http://docs.openstack.org/grizzly/bas... ).

I believe from my reading that I need to create a floating ip range and public network (as described here: http://openstack.redhat.com/Floating_... ). I'm having trouble determining what options I should specify in order to make it work (especially allocation pool and gateway).

Here are the controller (all-in-one packstack installation) node interfaces I'm working with:

br-ex: flags=67<UP,BROADCAST,RUNNING>  mtu 1500
    inet6 fe80::a803:55ff:febc:e705  prefixlen 64  scopeid 0x20<link>
    ether fa:1f:ad:29:1e:4f  txqueuelen 0  (Ethernet)
    RX packets 18  bytes 1116 (1.0 KiB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 8  bytes 648 (648.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

br-int: flags=67<UP,BROADCAST,RUNNING>  mtu 1500
    inet6 fe80::203a:8ff:fe67:b568  prefixlen 64  scopeid 0x20<link>
    ether 72:2e:2b:4b:7b:42  txqueuelen 0  (Ethernet)
    RX packets 143  bytes 35766 (34.9 KiB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 8  bytes 648 (648.0 B)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

em1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    inet 10.15.161.221  netmask 255.255.254.0  broadcast 10.15.161.255
    inet6 2620:52:0:fa0:f2de:f1ff:febb:8f4c  prefixlen 64  scopeid 0x0<global>
    inet6 fe80::f2de:f1ff:febb:8f4c  prefixlen 64  scopeid 0x20<link>
    ether f0:de:f1:bb:8f:4c  txqueuelen 1000  (Ethernet)
    RX packets 247307  bytes 322032955 (307.1 MiB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 144156  bytes 12030869 (11.4 MiB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
    device interrupt 20  memory 0xf2500000-f2520000  

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
    inet 127.0.0.1  netmask 255.0.0.0
    inet6 ::1  prefixlen 128  scopeid 0x10<host>
    loop  txqueuelen 0  (Local Loopback)
    RX packets 332121  bytes 121891330 (116.2 MiB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 332121  bytes 121891330 (116.2 MiB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tap1470c10e-b7: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    inet6 fe80::fc16:3eff:fe51:64c5  prefixlen 64  scopeid 0x20<link>
    ether fe:16:3e:51:64:c5  txqueuelen 500  (Ethernet)
    RX packets 275  bytes 47270 (46.1 KiB)
    RX errors 0  dropped 0  overruns 0  frame 0
    TX packets 247  bytes 44431 (43.3 KiB)
    TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

tapd61d4620-a6: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
    inet6 fe80::fc16:3eff:fe42:878d  prefixlen 64  scopeid 0x20<link>
    ether fe:16:3e:42:87:8d  txqueuelen ...