[Openstack] Can not ping the tenant router gateway from host

Andreas Scheuring scheuran at linux.vnet.ibm.com
Tue Mar 3 07:50:42 UTC 2015


Hi Mitchell, 
just was going through this mailthread. 


If I get it right, your gateway IP Address is the 172.29.105.101. It is
configured on the Gateway interface (qg-8aac20dc-60) in the routers
network namespace (qrouter-b69f04d9-910d-472e-8f2c-ac1344c6127f). 

You can prove that with executing
> ip netns exec qrouter-b69f04d9-910d-472e-8f2c-ac1344c6127f ip a

Now you executed a ping in this network namespace to the ip adress of
the gateway: 
> ip netns exec qrouter-b69f04d9-910d-472e-8f2c-ac1344c6127f ping -I
qg-8aac20dc-60 172.29.105.101
--> With this command you're pinging yourself (localhost). 

If you want to ping something from the routers namespace, than it's an
ip address of the guest (via the qr... interface), assuming you have
ping enabled in the guests security groups and rules config. Or an
external server that is also in the 172.x network via the qg interface


But what you want to achieve is to ping your router from your host,
right? This only works if your br-ex has also an ip adress in the
172.29.105.x subnet. 

Could you please dump your ip configuration of the host? Does your br-ex
have an IP Adress in the 172.29.x.x network?
> ip a
And can you also please dump your routing table?
> ip route

The alternative from pinging it from your host is to ping from an
external server that is also in this 172.x subnet and attached to the
same physical network as your host is.


Hope that helps

-- 
Andreas 
(irc: scheuran)


On Mon, 2015-03-02 at 19:13 -0800, Remo Mattei wrote:
> I would recreate the router, and the external network. here is what I
> have used since quantum. 
> 
> 
> 
> 
> 
> 
> #neutron net-create external --router:external=True
> --provider:network_type vlan --provider:physical_network physnet1
> --provider:segmentation_id 111
> 
> 
> 
> 
> #neutron subnet-create --name public --gateway 10.211.55.1
> --allocation-pool start=10.211.55.100,end=10.211.55.110 external
> 10.211.55.0/24 --enable_dhcp=False
> 
> 
> 
> 
> 
> > On Mar 2, 2015, at 18:45, Mitchell Chen <mitchell.chen at mediatek.com>
> > wrote:
> > 
> > Hi All,
> >  
> > The gateway can be pinged using the router, but I can not ping the
> > tenant router gateway from host. Is there a way to find out the
> > cause? It used to work, so the physical setting should be correct.
> > Please advise. Thanks.
> >  
> > root at neutron:~# ip netns
> > qrouter-b69f04d9-910d-472e-8f2c-ac1344c6127f
> >  
> > root at neutron:~# ovs-vsctl show
> > f22d3ba4-d785-4fe7-a283-16ffbc75c434
> >     Bridge br-int
> >         fail_mode: secure
> >         Port patch-tun
> >             Interface patch-tun
> >                 type: patch
> >                 options: {peer=patch-int}
> >         Port "qr-63d87686-6a"
> >             tag: 1
> >             Interface "qr-63d87686-6a"
> >                 type: internal
> >         Port br-int
> >             Interface br-int
> >                 type: internal
> >     Bridge br-ex
> >         Port br-ex
> >             Interface br-ex
> >                 type: internal
> >         Port "qg-8aac20dc-60"
> >             Interface "qg-8aac20dc-60"
> >                 type: internal
> >         Port "eth2"
> >             Interface "eth2"
> >     Bridge br-tun
> >         Port "gre-c0a801cc"
> >             Interface "gre-c0a801cc"
> >                 type: gre
> >                 options: {in_key=flow, local_ip="192.168.1.220",
> > out_key=flow, remote_ip="192.168.1.204"}
> >         Port br-tun
> >             Interface br-tun
> >                 type: internal
> >         Port "gre-c0a801d5"
> >             Interface "gre-c0a801d5"
> >                 type: gre
> >                 options: {in_key=flow, local_ip="192.168.1.220",
> > out_key=flow, remote_ip="192.168.1.213"}
> >         Port patch-int
> >             Interface patch-int
> >                 type: patch
> >                 options: {peer=patch-tun}
> >         Port "gre-c0a801d2"
> >             Interface "gre-c0a801d2"
> >                 type: gre
> >                 options: {in_key=flow, local_ip="192.168.1.220",
> > out_key=flow, remote_ip="192.168.1.210"}
> >     ovs_version: "2.0.2"
> >  
> > root at neutron:~# ip netns exec
> > qrouter-b69f04d9-910d-472e-8f2c-ac1344c6127f ping -I qg-8aac20dc-60
> > 172.29.105.101
> > PING 172.29.105.101 (172.29.105.101) from 172.29.105.101
> > qg-8aac20dc-60: 56(84) bytes of data.
> > 64 bytes from 172.29.105.101: icmp_seq=1 ttl=64 time=0.055 ms
> > 64 bytes from 172.29.105.101: icmp_seq=2 ttl=64 time=0.050 ms
> > 64 bytes from 172.29.105.101: icmp_seq=3 ttl=64 time=0.054 ms
> > 64 bytes from 172.29.105.101: icmp_seq=4 ttl=64 time=0.060 ms
> > 64 bytes from 172.29.105.101: icmp_seq=5 ttl=64 time=0.056 ms
> > 64 bytes from 172.29.105.101: icmp_seq=6 ttl=64 time=0.059 ms
> > 64 bytes from 172.29.105.101: icmp_seq=7 ttl=64 time=0.051 ms
> > 64 bytes from 172.29.105.101: icmp_seq=8 ttl=64 time=0.048 ms
> >  
> > But the router gateway can not be pinned from the host:
> > root@ neutron:~# ping -c 4 172.29.105.101
> > PING 172.29.105.101 (172.29.105.101) 56(84) bytes of data.
> >  
> > --- 172.29.105.101 ping statistics ---
> > 4 packets transmitted, 0 received, 100% packet loss, time 3022ms
> >  
> > root@ neutron:/home/stack/Openstack-mtk# neutron net-list
> > +--------------------------------------+------------+------------------------------------------------------+
> > | id                                   | name       |
> > subnets                                              |
> > +--------------------------------------+------------+------------------------------------------------------+
> > | 2b3a3277-c8d9-4767-8aaa-ecd9f171b65c | extern-net |
> > 9e4527ab-a63b-4b76-9757-0f802e76484b 172.29.105.0/24 |
> > | c5a1668d-4ddc-41fd-94eb-d5c6d8b9e974 | demo-net   |
> > d33b74e4-7668-46f4-8f13-88034fc79624 192.168.2.0/24  |
> > +--------------------------------------+------------+------------------------------------------------------+
> > root@ neutron:/home/stack/Openstack-mtk# neutron subnet-list
> > +--------------------------------------+---------------+-----------------+------------------------------------------------------+
> > | id                                   | name          | cidr
> > | allocation_pools                                     |
> > +--------------------------------------+---------------+-----------------+------------------------------------------------------+
> > | 9e4527ab-a63b-4b76-9757-0f802e76484b | extern-subnet |
> > 172.29.105.0/24 | {"start": "172.29.105.101", "end":
> > "172.29.105.127"} |
> > | d33b74e4-7668-46f4-8f13-88034fc79624 | demo-subnet   |
> > 192.168.2.0/24  | {"start": "192.168.2.2", "end": "192.168.2.254"}
> > |
> > +--------------------------------------+---------------+-----------------+------------------------------------------------------+
> >  
> > root@ neutron:/home/stack/Openstack-mtk# neutron subnet-show
> > extern-subnet
> > +------------------+------------------------------------------------------+
> > | Field            | Value
> >        |
> > +------------------+------------------------------------------------------+
> > | allocation_pools | {"start": "172.29.105.101", "end":
> > "172.29.105.127"} |
> > | cidr             | 172.29.105.0/24
> > |
> > | dns_nameservers  |
> > |
> > | enable_dhcp      | False
> > |
> > | gateway_ip       | 172.29.105.254
> > |
> > | host_routes      |
> >                            |
> > | id               | 9e4527ab-a63b-4b76-9757-0f802e76484b
> > |
> > | ip_version       | 4
> > |
> > | name             | extern-subnet
> > |
> > | network_id       | 2b3a3277-c8d9-4767-8aaa-ecd9f171b65c
> > |
> > | tenant_id        | 7479d4eabeb14b45a7f38269155ec0f5
> > |
> > +------------------+------------------------------------------------------+
> > root@ neutron:/home/stack/Openstack-mtk# neutron subnet-show
> > demo-subnet
> > +------------------+--------------------------------------------------+
> > | Field            | Value
> > |
> > +------------------+--------------------------------------------------+
> > | allocation_pools | {"start": "192.168.2.2", "end":
> > "192.168.2.254"} |
> > | cidr             | 192.168.2.0/24
> > |
> > | dns_nameservers  |
> > |
> > | enable_dhcp      | True
> > |
> > | gateway_ip       | 192.168.2.1
> > |
> > | host_routes      |
> > |
> > | id               | d33b74e4-7668-46f4-8f13-88034fc79624
> > |
> > | ip_version       | 4
> > |
> > | name             | demo-subnet
> > |
> > | network_id       | c5a1668d-4ddc-41fd-94eb-d5c6d8b9e974
> > |
> > | tenant_id        | 1bc3de8b19384858a1a7a6395e1845e3
> > |
> > +------------------+--------------------------------------------------+
> >  
> >  
> > From: Remo Mattei [mailto:remo at italy1.com] 
> > Sent: Friday, February 27, 2015 11:39 PM
> > To: Mitchell Chen
> > Cc: openstack at lists.openstack.org
> > Subject: Re: [Openstack] Can not ping the tenant router gateway from
> > any nodes after all nodes shut down/turned on
> >  
> > Then you know there is something wrong with that router how did you
> > set it up? Is this rdo?
> >  
> > Ciao
> > 
> > Inviato da iPhone ()
> > 
> > Il giorno 27/feb/2015, alle ore 23:35, Mitchell Chen
> > <mitchell.chen at mediatek.com> ha scritto:
> > 
> > 
> >         It can’t be pinged:
> >          
> >         root@ neutron:~# ip netns exec
> >         qrouter-48cc6f75-b0a2-4468-a0bd-e6567237b7ee ping -I
> >         qg-34625a11-da 172.29.105.1
> >         PING 172.29.105.1 (172.29.105.1) from 172.29.105.101
> >         qg-34625a11-da: 56(84) bytes of data.
> >         From 172.29.105.101 icmp_seq=1 Destination Host Unreachable
> >         From 172.29.105.101 icmp_seq=2 Destination Host Unreachable
> >         From 172.29.105.101 icmp_seq=3 Destination Host Unreachable
> >         From 172.29.105.101 icmp_seq=4 Destination Host Unreachable
> >         From 172.29.105.101 icmp_seq=5 Destination Host Unreachable
> >         From 172.29.105.101 icmp_seq=6 Destination Host Unreachable
> >         From 172.29.105.101 icmp_seq=7 Destination Host Unreachable
> >         From 172.29.105.101 icmp_seq=8 Destination Host Unreachable
> >         From 172.29.105.101 icmp_seq=9 Destination Host Unreachable
> >         From 172.29.105.101 icmp_seq=10 Destination Host Unreachable
> >         From 172.29.105.101 icmp_seq=11 Destination Host Unreachable
> >         From 172.29.105.101 icmp_seq=12 Destination Host Unreachable
> >         From 172.29.105.101 icmp_seq=13 Destination Host Unreachable
> >         From 172.29.105.101 icmp_seq=14 Destination Host Unreachable
> >          
> >         From: Remo Mattei [mailto:Remo at Italy1.com] 
> >         Sent: Friday, February 27, 2015 11:08 PM
> >         To: Mitchell Chen
> >         Cc: openstack at lists.openstack.org
> >         Subject: Re: [Openstack] Can not ping the tenant router
> >         gateway from any nodes after all nodes shut down/turned on
> >          
> >         Sorry No No. that is the ip address of the virtual router.
> >         You need to ping the gateway using the router. So it should
> >         look like this
> >          
> >                         ip netns exec
> >                         qrouter-48cc6f75-b0a2-4468-a0bd-e6567237b7ee
> >                         ping -I  qg-34625a11-da 172.29.105.1
> >          
> >          
> >          
> >                 On Feb 27, 2015, at 22:57, Mitchell Chen
> >                 <mitchell.chen at mediatek.com> wrote:
> >                  
> >                 Hi Remo,
> >                  
> >                 Thank you for looking at this issue. Yes, I can ping
> >                 the gateway from the router. Please look the red in
> >                 the following my previous mail.  I followed the
> >                 OpenStack installation
> >                 guide, http://docs.openstack.org/icehouse/install-guide/install/apt/content/neutron_initial-tenant-network.html, to set up the network. More detail networks and router are in the following: Please let me know if you need any more information.
> >                  
> >                 Thanks,
> >                 Mitchell
> >                  
> >                 root at control:/# neutron net-list
> >                 +--------------------------------------+----------+------------------------------------------------------+
> >                 | id                                   | name     |
> >                 subnets
> >                                 |
> >                 +--------------------------------------+----------+------------------------------------------------------+
> >                 | 3ef88278-b944-4ba2-a39b-0c23a2f22385 | ext-net  |
> >                 35501767-4b22-4ffc-9ed6-cdbe59759b9e 172.29.105.0/24
> >                 |
> >                 | 6f4e6906-ec84-410f-bfc1-89e076791ddb | demo-net |
> >                 318125f7-3015-44cb-80fe-f8682a997392 192.168.2.0/24
> >                 |
> >                 +--------------------------------------+----------+------------------------------------------------------+
> >                 root@ control:/ # neutron subnet-list
> >                 +--------------------------------------+-------------+-----------------+------------------------------------------------------+
> >                 | id                                   | name
> >                 | cidr            | allocation_pools
> >                 |
> >                 +--------------------------------------+-------------+-----------------+------------------------------------------------------+
> >                 | 318125f7-3015-44cb-80fe-f8682a997392 | demo-subnet
> >                 | 192.168.2.0/24  | {"start": "192.168.2.2", "end":
> >                 "192.168.2.254"}     |
> >                 | 35501767-4b22-4ffc-9ed6-cdbe59759b9e | ext-subnet
> >                 | 172.29.105.0/24 | {"start": "172.29.105.101",
> >                 "end": "172.29.105.127"} |
> >                 +--------------------------------------+-------------+-----------------+------------------------------------------------------+
> >                 root@ control:/ # neutron router-list
> >                 +--------------------------------------+-------------+-----------------------------------------------------------------------------+
> >                 | id                                   | name
> >                 | external_gateway_info
> >                 |
> >                 +--------------------------------------+-------------+-----------------------------------------------------------------------------+
> >                 | 48cc6f75-b0a2-4468-a0bd-e6567237b7ee | demo-router
> >                 | {"network_id":
> >                 "3ef88278-b944-4ba2-a39b-0c23a2f22385",
> >                 "enable_snat": true} |
> >                 +--------------------------------------+-------------+-----------------------------------------------------------------------------+
> >                 root at mussdhux23:/home/stack/Openstack-mtk# neutron
> >                 router-show 48cc6f75-b0a2-4468-a0bd-e6567237b7ee
> >                 +-----------------------+-----------------------------------------------------------------------------+
> >                 | Field                 |
> >                 Value                                                                       |
> >                 +-----------------------+-----------------------------------------------------------------------------+
> >                 | admin_state_up        | True
> >                 |
> >                 | external_gateway_info | {"network_id":
> >                 "3ef88278-b944-4ba2-a39b-0c23a2f22385",
> >                 "enable_snat": true} |
> >                 | id                    |
> >                 48cc6f75-b0a2-4468-a0bd-e6567237b7ee
> >                 |
> >                 | name                  |
> >                 demo-router                                                                 |
> >                 | routes                |
> >                 |
> >                 | status                | ACTIVE
> >                 |
> >                 | tenant_id             |
> >                 1bc3de8b19384858a1a7a6395e1845e3
> >                 |
> >                 +-----------------------+-----------------------------------------------------------------------------+
> >                 root at mussdhux23:/home/stack/Openstack-mtk# neutron
> >                 router-port-list
> >                 48cc6f75-b0a2-4468-a0bd-e6567237b7ee
> >                 +--------------------------------------+------+-------------------+---------------------------------------------------------------------------------------+
> >                 | id                                   | name |
> >                 mac_address       | fixed_ips
> >                 |
> >                 +--------------------------------------+------+-------------------+---------------------------------------------------------------------------------------+
> >                 | 34625a11-da44-4507-8aa8-6073b724816b |      |
> >                 fa:16:3e:d7:2f:27 | {"subnet_id":
> >                 "35501767-4b22-4ffc-9ed6-cdbe59759b9e",
> >                 "ip_address": "172.29.105.101"} |
> >                 | 70c2c01f-8306-45df-958c-b445eb3523ee |      |
> >                 fa:16:3e:27:83:6c | {"subnet_id":
> >                 "318125f7-3015-44cb-80fe-f8682a997392",
> >                 "ip_address": "192.168.2.1"}    |
> >                 +--------------------------------------+------+-------------------+---------------------------------------------------------------------------------------+
> >                  
> >                 From: Remo Mattei [mailto:Remo at Italy1.com] 
> >                 Sent: Friday, February 27, 2015 9:08 PM
> >                 To: Mitchell Chen
> >                 Cc: openstack at lists.openstack.org
> >                 Subject: Re: [Openstack] Can not ping the tenant
> >                 router gateway from any nodes after all nodes shut
> >                 down/turned on
> >                  
> >                 that only shows you ping your interface can you ping
> >                 your gateway from the router? How was the router
> >                 created? Did you enable provider network? You show
> >                 some data but not all. 
> >                  
> >                  
> >                 Remo 
> >                         On Feb 27, 2015, at 18:52, Mitchell Chen
> >                         <mitchell.chen at mediatek.com> wrote:
> >                          
> >                         These is an issue that the tenant router
> >                         gateway can not be pinned. Is this an
> >                         OpenStack issue? It doesn’t allow all nodes
> >                         to be powered off and on? Before the nodes
> >                         were shut down, networking works great
> >                         either from inside instances to access
> >                         outside internet or from outside to access
> >                         the instances. Please help:
> >                          
> >                         root at neutron:/# neutron subnet-list
> >                         +--------------------------------------+-------------+-----------------+------------------------------------------------------+
> >                         | id                                   |
> >                         name        | cidr            |
> >                         allocation_pools
> >                         |
> >                         +--------------------------------------+-------------+-----------------+------------------------------------------------------+
> >                         | 318125f7-3015-44cb-80fe-f8682a997392 |
> >                         demo-subnet | 192.168.2.0/24  | {"start":
> >                         "192.168.2.2", "end": "192.168.2.254"}     |
> >                         | 35501767-4b22-4ffc-9ed6-cdbe59759b9e |
> >                         ext-subnet  | 172.29.105.0/24 | {"start":
> >                         "172.29.105.101", "end": "172.29.105.127"} |
> >                         +--------------------------------------+-------------+-----------------+------------------------------------------------------+
> >                         root@ neutron:/# neutron subnet-show
> >                         35501767-4b22-4ffc-9ed6-cdbe59759b9e
> >                         +------------------+------------------------------------------------------+
> >                         | Field            | Value
> >                         |
> >                         +------------------+------------------------------------------------------+
> >                         | allocation_pools | {"start":
> >                         "172.29.105.101", "end": "172.29.105.127"} |
> >                         | cidr             | 172.29.105.0/24
> >                         |
> >                         | dns_nameservers  |
> >                         |
> >                         | enable_dhcp      |
> >                         False
> >                                           |
> >                         | gateway_ip       | 172.29.105.254
> >                         |
> >                         | host_routes      |
> >                         |
> >                         | id               |
> >                         35501767-4b22-4ffc-9ed6-cdbe59759b9e
> >                         |
> >                         | ip_version       | 4
> >                         |
> >                         | name             | ext-subnet
> >                         |
> >                         | network_id       |
> >                         3ef88278-b944-4ba2-a39b-0c23a2f22385
> >                         |
> >                         | tenant_id        |
> >                         7479d4eabeb14b45a7f38269155ec0f5
> >                         |
> >                          
> >                          
> >                          
> >                          
> >                         root@ neutron:/# ip netns
> >                         qdhcp-6f4e6906-ec84-410f-bfc1-89e076791ddb
> >                         qrouter-48cc6f75-b0a2-4468-a0bd-e6567237b7ee
> >                          
> >                         root@ neutron:/# ip netns exec
> >                         qrouter-48cc6f75-b0a2-4468-a0bd-e6567237b7ee
> >                         ip a
> >                         1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536
> >                         qdisc noqueue state UNKNOWN group default
> >                             link/loopback 00:00:00:00:00:00 brd
> >                         00:00:00:00:00:00
> >                             inet 127.0.0.1/8 scope host lo
> >                                valid_lft forever preferred_lft
> >                         forever
> >                             inet6 ::1/128 scope host
> >                                valid_lft forever preferred_lft
> >                         forever
> >                         35: qr-70c2c01f-83: <BROADCAST,UP,LOWER_UP>
> >                         mtu 1500 qdisc noqueue state UNKNOWN group
> >                         default
> >                             link/ether fa:16:3e:27:83:6c brd
> >                         ff:ff:ff:ff:ff:ff
> >                             inet 192.168.2.1/24 brd 192.168.2.255
> >                         scope global qr-70c2c01f-83
> >                                valid_lft forever preferred_lft
> >                         forever
> >                             inet6 fe80::f816:3eff:fe27:836c/64 scope
> >                         link
> >                                valid_lft forever preferred_lft
> >                         forever
> >                         36:qg-34625a11-da: <BROADCAST,UP,LOWER_UP>
> >                         mtu 1500 qdisc noqueue state UNKNOWN group
> >                         default
> >                             link/ether fa:16:3e:d7:2f:27 brd
> >                         ff:ff:ff:ff:ff:ff
> >                             inet 172.29.105.101/24 brd
> >                         172.29.105.255 scope global qg-34625a11-da
> >                                valid_lft forever preferred_lft
> >                         forever
> >                             inet6 fe80::f816:3eff:fed7:2f27/64 scope
> >                         link
> >                                valid_lft forever preferred_lft
> >                         forever
> >                          
> >                         // From the qrouter, the gateway can be
> >                         pinned 
> >                         root@ neutron:/# ip netns exec
> >                         qrouter-48cc6f75-b0a2-4468-a0bd-e6567237b7ee
> >                         ping -c 4 172.29.105.101
> >                         PING 172.29.105.101 (172.29.105.101) 56(84)
> >                         bytes of data.
> >                         64 bytes from 172.29.105.101: icmp_seq=1
> >                         ttl=64 time=0.063 ms
> >                         64 bytes from 172.29.105.101: icmp_seq=2
> >                         ttl=64 time=0.060 ms
> >                         64 bytes from 172.29.105.101: icmp_seq=3
> >                         ttl=64 time=0.059 ms
> >                         64 bytes from 172.29.105.101: icmp_seq=4
> >                         ttl=64 time=0.058 ms
> >                          
> >                         //// Can not be pinned here:
> >                         root@ neutron:/# ping -c 4  172.29.105.101
> >                         PING 172.29.105.101 (172.29.105.101) 56(84)
> >                         bytes of data.
> >                          
> >                         --- 172.29.105.101 ping statistics ---
> >                         4 packets transmitted, 0 received, 100%
> >                         packet loss, time 3023ms
> >                          
> >                         root@ neutron:/home/stack/Openstack# neutron
> >                         agent-list
> >                         +--------------------------------------+--------------------+------------+-------+----------------+
> >                         | id                                   |
> >                         agent_type         | host       | alive |
> >                         admin_state_up |
> >                         +--------------------------------------+--------------------+------------+-------+----------------+
> >                         | 68eba267-b885-4aad-96a4-e8d19ac9db4a | L3
> >                         agent           | mussdhux20 | :-)   | True
> >                         |
> >                         | c0726b66-a1f4-4b00-9120-7bf0ee91a3d0 |
> >                         DHCP agent         | mussdhux20 | :-)   |
> >                         True           |
> >                         | d8808f97-90f8-424d-a786-45b4541af755 |
> >                         Open vSwitch agent | mussdhux04 | :-)   |
> >                         True           |
> >                         | e8d85451-3f6f-4b2a-94a1-6dd3e9a93cff |
> >                         Metadata agent     | mussdhux20 | :-)   |
> >                         True           |
> >                         | f4e51873-7e18-49a4-ab6b-94c24500e25f |
> >                         Open vSwitch agent | mussdhux13 | :-)   |
> >                         True           |
> >                         | f8cab47d-a0db-4de2-b457-23c4e87ccb32 |
> >                         Open vSwitch agent | mussdhux10 | :-)   |
> >                         True           |
> >                         | fd9ab1c9-ce62-4504-8d68-215584a70a17 |
> >                         Open vSwitch agent | mussdhux20 | :-)   |
> >                         True           |
> >                         +--------------------------------------+--------------------+------------+-------+----------------+
> >                          
> >                         I also restarted the neutron services after
> >                         my neutron node booted up.
> >                         service neutron-plugin-openvswitch-agent
> >                         restart
> >                         service neutron-l3-agent restart
> >                         service neutron-dhcp-agent restart
> >                         service neutron-metadata-agent restart
> >                          
> >                         Anyone has solutions for this kind of issue?
> >                          
> >                          
> >                         Thank you so much for the help,
> >                         Mitchell
> >                          
> >                         From: Mark Loza
> >                         [mailto:mloza at morphlabs.com] 
> >                         Sent: Friday, February 27, 2015 3:59 AM
> >                         To: Mitchell
> >                         Chen; openstack at lists.openstack.org
> >                         Subject: Re: [Openstack] Instance can not
> >                         ping each other
> >                          
> >                         I assume you are using neutron instead of
> >                         nova-network
> >                         
> >                         On 2/27/15 7:57 PM, Mark Loza wrote:
> >                                 Hi,
> >                                 
> >                                 Did you check if the neutron agents
> >                                 are all alive?
> >                                 
> >                                 # neutron agent-list
> >                                 
> >                                 
> >                                 On 2/27/15 3:49 PM, Mitchell Chen
> >                                 wrote:
> >                                         Hi All,
> >                                          
> >                                         I followed the OpenStack
> >                                         icehouse installation guide
> >                                         to successfully install a
> >                                         five node system, one
> >                                         control node, one neutron
> >                                         and three compute nodes.
> >                                         Inside of the instance, I
> >                                         can ping other instances’
> >                                         virtual IP address and
> >                                         outside internet fine.
> >                                         Recently, we decided to move
> >                                         all the nodes to a lab. So,
> >                                         I powered down the five
> >                                         nodes before the move and
> >                                         powered up them afterward.
> >                                         All the physical network
> >                                         connections were exactly the
> >                                         same as they were before the
> >                                         move. But, I can not even
> >                                         ping other instance after
> >                                         the five nodes up again. 
> >                                          
> >                                         I typed “route –n” inside of
> >                                         the instance, no any IP is
> >                                         shown. What’s wrong? Please
> >                                         help how I can get the
> >                                         instance networking back.
> >                                          
> >                                         Thanks,
> >                                         Mitchell     
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