[Openstack-operators] While adding external bridge connection lost to the network node

Geo Varghese gvarghese at aqorn.com
Fri Nov 21 12:16:11 UTC 2014


Hi Britt,

Thanks for the answer.

I am using Virtual machine(KVM) for openstack installation. Its a single
node installation.

Now i can create instance from openstack dahboard and and can login in to
the instance from dashboard konsole.

But i couln't connect to instance from controller node.

Also i couldn't have connection between instances.

Ifconfig output from openstack installation node
=======================
root at ubuntu:/home/geo# ifconfig
br-int    Link encap:Ethernet  HWaddr 26:73:95:7a:c5:4e
          inet6 addr: fe80::ec9d:9aff:fe2f:66ab/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:648 (648.0 B)

br-tun    Link encap:Ethernet  HWaddr 0e:af:b2:8e:89:44
          inet6 addr: fe80::c89f:cfff:fe74:712/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:648 (648.0 B)

eth0      Link encap:Ethernet  HWaddr 52:54:00:d6:4c:4f
          inet addr:192.168.122.54  Bcast:192.168.122.255
Mask:255.255.255.0
          inet6 addr: fe80::5054:ff:fed6:4c4f/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:162 errors:0 dropped:3 overruns:0 frame:0
          TX packets:100 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:16187 (16.1 KB)  TX bytes:13445 (13.4 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:65536  Metric:1
          RX packets:737 errors:0 dropped:0 overruns:0 frame:0
          TX packets:737 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:104803 (104.8 KB)  TX bytes:104803 (104.8 KB)

tap561bdedf-3e Link encap:Ethernet  HWaddr 42:c5:72:1c:3b:99
          inet6 addr: fe80::40c5:72ff:fe1c:3b99/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:648 (648.0 B)

tapde436ec7-3b Link encap:Ethernet  HWaddr b6:09:88:dc:f7:5a
          inet6 addr: fe80::b409:88ff:fedc:f75a/64 Scope:Link
          UP BROADCAST RUNNING  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:0 (0.0 B)  TX bytes:648 (648.0 B)
======================================

Same eth0 i have used to add br-ex, you mean thats the issue right?

On Fri, Nov 21, 2014 at 5:31 PM, Britt Houser (bhouser) <bhouser at cisco.com>
wrote:

>  Was the interface you added to br-ex the same interface to which you
> connected to the box?  If so, this is expected.  When you add an interface
> to the bridge you lose IP connectivity to that interface.  The IP address
> which which was assigned to the interface now needs to be assigned to the
> br-ex bridge, and then you'll have connectivity once again.
>
>  Thx,
> britt
>
>   From: Geo Varghese <gvarghese at aqorn.com>
> Date: Friday, November 21, 2014 at 1:39 AM
> To: "openstack at lists.openstack.org" <openstack at lists.openstack.org>, "
> openstack-operators at lists.openstack.org" <
> openstack-operators at lists.openstack.org>
> Subject: [Openstack-operators] While adding external bridge connection
> lost to the network node
>
>   Hi Team,
>
> While adding external bridge connection lost to the network node from
> other nodes. we couldn't ssh to network node after creating bridge.
>
> If we do below steps of following link
> http://docs.openstack.org/icehouse/install-guide/install/apt/content/neutron-ml2-network-node.html
>
> ===========================================
> 3) Add the external bridge:
>
> # ovs-vsctl add-br br-ex
>
> 4) Add a port to the external bridge that connects to the physical
> external network interface:
>
> Replace INTERFACE_NAME with the actual interface name. For example, eth2
> or ens256.
>
> # ovs-vsctl add-port br-ex INTERFACE_NAME
> =============================================
>
> External connection to network node fails. Then we couldn't connect to network node from other machines.
>
> Any one faced this issue?
>
> Please help us to fix this issue.
>
>
>  --
> Regards,
> Geo Varghese
>



-- 
--
Regards,
Geo Varghese
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