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

Britt Houser (bhouser) bhouser at cisco.com
Mon Nov 24 12:52:43 UTC 2014 

Geo,

Sorry for not getting back sooner.  Was out sick.  Can you post the output of 'ovs-vsctl show'?  I didn’t see a br-ex interface in your ifconfig output.

Thx,
britt


From: Geo Varghese <gvarghese at aqorn.com<mailto:gvarghese at aqorn.com>>
Date: Friday, November 21, 2014 at 1:39 PM
To: Britt Houser <bhouser at cisco.com<mailto:bhouser at cisco.com>>
Cc: "openstack at lists.openstack.org<mailto:openstack at lists.openstack.org>" <openstack at lists.openstack.org<mailto:openstack at lists.openstack.org>>, "openstack-operators at lists.openstack.org<mailto:openstack-operators at lists.openstack.org>" <openstack-operators at lists.openstack.org<mailto:openstack-operators at lists.openstack.org>>
Subject: Re: [Openstack-operators] While adding external bridge connection lost to the network node

Britt,

Just tried it but network restart failed if I add these lines. Also IP not assigned to bridge when controller restarted.

When try to do following command after this change

ifdown eth0

Show error in following line  in /etc/network/interfaces

iface br-ex inet static

Thanks again for your support.

On Fri, Nov 21, 2014 at 6:05 PM, Britt Houser (bhouser) <bhouser at cisco.com<mailto:bhouser at cisco.com>> wrote:
The br-ex config looks right, but you don't want eth0 to DHCP for an
address anymore.  Once its attached to br-ex, its an L2-only interface
(similar to switchport on cisco switch).  I think you want something like
this for eth0:

auto eth0
iface eth0 inet manual
  pre-up ifconfig $IFACE up
  post-down ifconfig $IFACE down


Thx,
britt

From:  Geo Varghese <gvarghese at aqorn.com<mailto:gvarghese at aqorn.com>>
Date:  Friday, November 21, 2014 at 7:22 AM
To:  Britt Houser <bhouser at cisco.com<mailto:bhouser at cisco.com>>
Cc:  "openstack at lists.openstack.org<mailto:openstack at lists.openstack.org>" <openstack at lists.openstack.org<mailto:openstack at lists.openstack.org>>,
"openstack-operators at lists.openstack.org<mailto:openstack-operators at lists.openstack.org>"
<openstack-operators at lists.openstack.org<mailto:openstack-operators at lists.openstack.org>>
Subject:  Re: [Openstack-operators] While adding external bridge
connection lost to the network node


Thanks Britt.


You mean like this right?

cat /etc/network/interfaces
=========================
# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet dhcp

# The external network interface
auto br-ex
iface br-ex inet static
       address 192.168.122.54
       netmask 255.255.255.0
       gateway 192.168.122.1
       dns-nameservers 8.8.8.8 8.8.4.4
==========================================================



On Fri, Nov 21, 2014 at 5:48 PM, Britt Houser (bhouser)
<bhouser at cisco.com<mailto:bhouser at cisco.com>> wrote:

Correct.  You need to updated your /etc/interfaces file so that the
192.168.122.54/24<http://192.168.122.54/24> <http://192.168.122.54/24> address gets assigned to
br-ex instead of eth0.

From: Geo Varghese <gvarghese at aqorn.com<mailto:gvarghese at aqorn.com>>
Date: Friday, November 21, 2014 at 7:16 AM
To: Britt Houser <bhouser at cisco.com<mailto:bhouser at cisco.com>>
Cc: "openstack at lists.openstack.org<mailto:openstack at lists.openstack.org>" <openstack at lists.openstack.org<mailto:openstack at lists.openstack.org>>,
"openstack-operators at lists.openstack.org<mailto:openstack-operators at lists.openstack.org>"
 <openstack-operators at lists.openstack.org<mailto:openstack-operators at lists.openstack.org>>
Subject: Re: [Openstack-operators] While adding external bridge connection
lost to the network node


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<mailto: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<mailto:gvarghese at aqorn.com>>
Date: Friday, November 21, 2014 at 1:39 AM
To: "openstack at lists.openstack.org<mailto:openstack at lists.openstack.org>" <openstack at lists.openstack.org<mailto:openstack at lists.openstack.org>>,
"openstack-operators at lists.openstack.org<mailto:openstack-operators at lists.openstack.org>"
 <openstack-operators at lists.openstack.org<mailto: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/neutro
n-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














--
--
Regards,
Geo Varghese




--
--
Regards,
Geo Varghese
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