# Revision history [back]

### Access VMs in Neutron

Hi to all,

I built a DevStack machine (on Ubuntu 12.04) with Neutron (https://wiki.openstack.org/wiki/NeutronDevstack) support. This added the bridge "br-ex" to my Devstack's machine with the IP 172.24.4.225.

Now I can access Neutron's functionalities into Horizon and I can build Networks, Routers and link a VM to a network. I also see the prebuilt network called "public" into Horizon, which has the network IP range 172.24.4.224/28.

I create a brand new VM using the cirrOS built-in image (ah, what is the cirrosOS package manager? I'd like to install apache on it cannot find both "apt-get" and "yum") and associate to it the network "public". The Neutron module gives it the IP 172.24.4.227.

I also modify (by using the Horizon GUI) the "default" security group so that it allows ICMP and SSH network traffic (and, of course, associate the "default" security group to my cirrOS VM).

The problem is that I cannot even ping my VM from the Devstack node and the VM cannot see the cirrOS VM.

DevStack machine:

$ping 172.24.4.227 PING 172.24.4.227 (172.24.4.227) 56(84) bytes of data. From 172.24.4.225 icmp_seq=1 Destination Host Unreachable What could be the problem? Should the "br-ex" bridge allow the access to the "public" network? Thanks Giulio ### Access VMs in Neutron Hi to all, I built a DevStack machine (on Ubuntu 12.04) with Neutron (https://wiki.openstack.org/wiki/NeutronDevstack) support. This added the bridge "br-ex" to my Devstack's machine with the IP 172.24.4.225. Now I can access Neutron's functionalities into Horizon and I can build Networks, Routers and link a VM to a network. I also see the prebuilt network called "public" into Horizon, which has the network IP range 172.24.4.224/28. I create a brand new VM using the cirrOS built-in image (ah, what is the cirrosOS package manager? I'd like to install apache on it cannot find both "apt-get" and "yum") and associate to it the network "public". The Neutron module gives it the IP 172.24.4.227. I also modify (by using the Horizon GUI) the "default" security group so that it allows ICMP and SSH network traffic (and, of course, associate the "default" security group to my cirrOS VM). The problem is that I cannot even ping my VM from the Devstack node and the VM cannot see the cirrOS VM.ping the Devstack machine. DevStack machine:$ ping 172.24.4.227

PING 172.24.4.227 (172.24.4.227) 56(84) bytes of data.

From 172.24.4.225 icmp_seq=1 Destination Host Unreachable

What could be the problem? Should the "br-ex" bridge allow the access to the "public" network?

Thanks Giulio

 3 No.3 Revision darragh-oreilly 2230 ●8 ●23 ●41

### Access Can't access VMs on public network in devstack with Neutron

Hi to all,

I built a DevStack machine (on Ubuntu 12.04) with Neutron (https://wiki.openstack.org/wiki/NeutronDevstack) support. This added the bridge "br-ex" to my Devstack's machine with the IP 172.24.4.225.

Now I can access Neutron's functionalities into Horizon and I can build Networks, Routers and link a VM to a network. I also see the prebuilt network called "public" into Horizon, which has the network IP range 172.24.4.224/28.

I create a brand new VM using the cirrOS built-in image (ah, what is the cirrosOS package manager? I'd like to install apache on it cannot find both "apt-get" and "yum") and associate to it the network "public". The Neutron module gives it the IP 172.24.4.227.

I also modify (by using the Horizon GUI) the "default" security group so that it allows ICMP and SSH network traffic (and, of course, associate the "default" security group to my cirrOS VM).

The problem is that I cannot even ping my VM from the Devstack node and the VM cannot ping the Devstack machine.

DevStack machine:

$ping 172.24.4.227 PING 172.24.4.227 (172.24.4.227) 56(84) bytes of data. From 172.24.4.225 icmp_seq=1 Destination Host Unreachable What could be the problem? Should the "br-ex" bridge allow the access to the "public" network? Thanks Giulio  4 retagged ### Can't access VMs on public network in devstack with Neutron Hi to all, I built a DevStack machine (on Ubuntu 12.04) with Neutron (https://wiki.openstack.org/wiki/NeutronDevstack) support. This added the bridge "br-ex" to my Devstack's machine with the IP 172.24.4.225. Now I can access Neutron's functionalities into Horizon and I can build Networks, Routers and link a VM to a network. I also see the prebuilt network called "public" into Horizon, which has the network IP range 172.24.4.224/28. I create a brand new VM using the cirrOS built-in image (ah, what is the cirrosOS package manager? I'd like to install apache on it cannot find both "apt-get" and "yum") and associate to it the network "public". The Neutron module gives it the IP 172.24.4.227. I also modify (by using the Horizon GUI) the "default" security group so that it allows ICMP and SSH network traffic (and, of course, associate the "default" security group to my cirrOS VM). The problem is that I cannot even ping my VM from the Devstack node and the VM cannot ping the Devstack machine. DevStack machine:$ ping 172.24.4.227

PING 172.24.4.227 (172.24.4.227) 56(84) bytes of data.

From 172.24.4.225 icmp_seq=1 Destination Host Unreachable

What could be the problem? Should the "br-ex" bridge allow the access to the "public" network?

Thanks Giulio

 5 retagged

### Can't access VMs on public network in devstack with Neutron

Hi to all,

I built a DevStack machine (on Ubuntu 12.04) with Neutron (https://wiki.openstack.org/wiki/NeutronDevstack) support. This added the bridge "br-ex" to my Devstack's machine with the IP 172.24.4.225.

Now I can access Neutron's functionalities into Horizon and I can build Networks, Routers and link a VM to a network. I also see the prebuilt network called "public" into Horizon, which has the network IP range 172.24.4.224/28.

I create a brand new VM using the cirrOS built-in image (ah, what is the cirrosOS package manager? I'd like to install apache on it cannot find both "apt-get" and "yum") and associate to it the network "public". The Neutron module gives it the IP 172.24.4.227.

I also modify (by using the Horizon GUI) the "default" security group so that it allows ICMP and SSH network traffic (and, of course, associate the "default" security group to my cirrOS VM).

The problem is that I cannot even ping my VM from the Devstack node and the VM cannot ping the Devstack machine.

DevStack machine:

\$ ping 172.24.4.227

PING 172.24.4.227 (172.24.4.227) 56(84) bytes of data.

From 172.24.4.225 icmp_seq=1 Destination Host Unreachable

What could be the problem? Should the "br-ex" bridge allow the access to the "public" network?

Thanks Giulio