[Openstack] bridges configuration in Neutron question

Anatoly Oreshkin Anatoly.Oreshkin at pnpi.spb.ru
Fri Feb 21 14:06:52 UTC 2014


Hello,

I've installed Openstack Havana (with Neutron networking) on single node running
Scientifcic Linux 6.4 (RHEL 6.4) using packstack --allinone.

Installer have created only one bridge - br-ex:
# ovs-vsctl show
76aa02e5-a442-40c6-8c77-e0471d1a8256
    Bridge br-ex
        Port br-ex
            Interface br-ex
                type: internal
    ovs_version: "1.11.0"


My single node has 2 physical NICs, eth0 & eth1. eth0 is for connection to local
(external) network and
eth1 for internal (cluster) network.
Before installing Openstack I created 2 linux bridges, br0 is on eth0, br1 is on eth1
to be able to launch virtual machine (with 2 network interfaces) in KVM.

Command "route" shows:

Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
239.2.11.72     *               255.255.255.255 UH    0      0        0 br1
172.24.4.224    *               255.255.255.240 U     0      0        0 br-ex
212.192.96.128  *               255.255.255.224 U     0      0        0 br0
192.168.1.0     *               255.255.255.0   U     0      0        0 br1
link-local      *               255.255.0.0     U     1007   0        0 br0
link-local      *               255.255.0.0     U     1008   0        0 br1
link-local      *               255.255.0.0     U     1023   0        0 br-ex
default         212.192.96.129  0.0.0.0         UG    0      0        0 br0

Here br0 is for external network, br1 for internal network.


As far as understand one more bridge br-int should be created. How to create it ?
Bridges br-ex and br-int should be associated with physical NICs ?
But eth0 & eth1 are already are assigned to bridges br0 & br1 respectively

Can anybody help me to clarify this issue ?
May be some commands ?

Thanks.
Anatoly.





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