6:38 p.m.
Hello,
I'm still not able to get snat to work (connecting to the Internet) with my
RDO all-in-one installation, and I'm wondering if my router is the issue.
My router is a Linksys WRT54G, which does not support a "DHCP reservation"
feature. I was able to set a fixed ip on it, because there is a range
available from 192.168.1.2 through to 192.168.1.99, also 192.168.1.150
through 192.168.1.254.
This is according to "toomanydonuts" posting here:
http://community.linksys.com/t5/Wireless-Routers/WRT54G-Static-IP-Questio...
I've been using the lower address range. Could this be the problem, or
should I look elsewhere?
In my setup I have two private subnets, and three VMs. I can ping between
the VMs, but can't ping the Internet. A virtual router connects the
subnets and external network.
I set up my external subnet as 192.168.1.0/28. I use the 28 to limit the
range for my router. The external range is the same as my actual physical
addresses on my LAN.
I should add, I'm not a network guy. I'm learning a lot of networking on
the fly here.
Thanks for any feedback!!
...John
9:58 p.m.
I don't think the range you are using is the problem, although you should be using
192.168.1.0/24 as your subnet and 192.168.1.1 as the router gateway (assuming that the WRT
is .1). You can set the allocation pool to a range like 192.168.1.10-192.168.1.99. Also,
assuming your WRT router is .1, you will have to manually assign the virtual router IP
(since the default is .1 when you create a router on a /24 network).
You say that your VMs are connected through a virtual router. Are you using floating IPs?
You can't just route the VM traffic to the WRT router without SNAT on the virtual
router, so make sure you set that network to external.
I suspect that the problem here might be that the virtual router was using the same IP as
the WRT router, or that you were doing routing without SNAT because the network wasn't
marked as external.
> Dan Sneddon | Principal OpenStack Engineer |
dsneddon(a)redhat.com
On Mar 19, 2016, at 4:39 PM, John Alway <jalway(a)gmail.com>
wrote:
Hello,
I'm still not able to get snat to work (connecting to the Internet) with my RDO
all-in-one installation, and I'm wondering if my router is the issue.
My router is a Linksys WRT54G, which does not support a "DHCP reservation"
feature. I was able to set a fixed ip on it, because there is a range available from
192.168.1.2 through to 192.168.1.99, also 192.168.1.150 through 192.168.1.254.
This is according to "toomanydonuts" posting here:
http://community.linksys.com/t5/Wireless-Routers/WRT54G-Static-IP-Questio...
I've been using the lower address range. Could this be the problem, or should I look
elsewhere?
In my setup I have two private subnets, and three VMs. I can ping between the VMs, but
can't ping the Internet. A virtual router connects the subnets and external
network.
I set up my external subnet as 192.168.1.0/28. I use the 28 to limit the range for my
router. The external range is the same as my actual physical addresses on my LAN.
I should add, I'm not a network guy. I'm learning a lot of networking on the fly
here.
Thanks for any feedback!!
...John
_______________________________________________
Rdo-list mailing list
Rdo-list(a)redhat.com
https://www.redhat.com/mailman/listinfo/rdo-list
To unsubscribe: rdo-list-unsubscribe(a)redhat.com
2:11 p.m.
Dan,
I set everything up the way you mentioned. The network I have labeled
"external network" is marked as an "extnet". By which I mean, in the
Dashboard, under "Network Details" for my external network... It has an
entry "Provider Network-> Physical Network: extnet".
I allocated a pool in the range 192.168.1.13 to 192,168.1.99 (I did this
because two of the computers on my physical network are 192.168.1.11 and
192.168.1.12).
The virtual router has an IP address of 192.168.1.13 on the external
network, and the public_subnet on the external network has a gateway of
192.168.1.2.
You're right about my physical router. Its address is 192.168.1.1
I tried pinging from a VM to the Internet, and it still fails.
I then tried allocating floating IPs to a VM, and it still failed to ping
the Internet.
So, I'm still not solved
Thanks for your feedback!
Regards,
...John
On Sat, Mar 19, 2016 at 9:58 PM, Dan Sneddon <dsneddon(a)redhat.com> wrote:
I don't think the range you are using is the problem, although
you should
be using 192.168.1.0/24 as your subnet and 192.168.1.1 as the router
gateway (assuming that the WRT is .1). You can set the allocation pool to a
range like 192.168.1.10-192.168.1.99. Also, assuming your WRT router is .1,
you will have to manually assign the virtual router IP (since the default
is .1 when you create a router on a /24 network).
You say that your VMs are connected through a virtual router. Are you
using floating IPs? You can't just route the VM traffic to the WRT router
without SNAT on the virtual router, so make sure you set that network to
external.
I suspect that the problem here might be that the virtual router was using
the same IP as the WRT router, or that you were doing routing without SNAT
because the network wasn't marked as external.
Dan Sneddon | Principal OpenStack Engineer | dsneddon(a)redhat.com
On Mar 19, 2016, at 4:39 PM, John Alway <jalway(a)gmail.com> wrote:
Hello,
I'm still not able to get snat to work (connecting to the Internet) with
my RDO all-in-one installation, and I'm wondering if my router is the issue.
My router is a Linksys WRT54G, which does not support a "DHCP reservation"
feature. I was able to set a fixed ip on it, because there is a range
available from 192.168.1.2 through to 192.168.1.99, also 192.168.1.150
through 192.168.1.254.
This is according to "toomanydonuts" posting here:
http://community.linksys.com/t5/Wireless-Routers/WRT54G-Static-IP-Questio...
I've been using the lower address range. Could this be the problem, or
should I look elsewhere?
In my setup I have two private subnets, and three VMs. I can ping between
the VMs, but can't ping the Internet. A virtual router connects the
subnets and external network.
I set up my external subnet as 192.168.1.0/28. I use the 28 to limit the
range for my router. The external range is the same as my actual physical
addresses on my LAN.
I should add, I'm not a network guy. I'm learning a lot of networking on
the fly here.
Thanks for any feedback!!
...John
_______________________________________________
Rdo-list mailing list
Rdo-list(a)redhat.com
https://www.redhat.com/mailman/listinfo/rdo-list
To unsubscribe: rdo-list-unsubscribe(a)redhat.com
1:03 p.m.
On 03/20/2016 12:11 PM, John Alway wrote:
Dan,
I set everything up the way you mentioned. The network I have labeled
"external network" is marked as an "extnet". By which I mean, in
the
Dashboard, under "Network Details" for my external network... It has
an entry "Provider Network-> Physical Network: extnet".
I allocated a pool in the range 192.168.1.13 to 192,168.1.99 (I did
this because two of the computers on my physical network are
192.168.1.11 and 192.168.1.12).
The virtual router has an IP address of 192.168.1.13 on the external
network, and the public_subnet on the external network has a gateway of
192.168.1.2.
You're right about my physical router. Its address is 192.168.1.1
I tried pinging from a VM to the Internet, and it still fails.
I then tried allocating floating IPs to a VM, and it still failed to
ping the Internet.
So, I'm still not solved
Thanks for your feedback!
Regards,
...John
On Sat, Mar 19, 2016 at 9:58 PM, Dan Sneddon <dsneddon(a)redhat.com
<mailto:dsneddon@redhat.com>> wrote:
I don't think the range you are using is the problem, although you
should be using 192.168.1.0/24 <http://192.168.1.0/24> as your
subnet and 192.168.1.1 as the router gateway (assuming that the WRT
is .1). You can set the allocation pool to a range like
192.168.1.10-192.168.1.99. Also, assuming your WRT router is .1,
you will have to manually assign the virtual router IP (since the
default is .1 when you create a router on a /24 network).
You say that your VMs are connected through a virtual router. Are
you using floating IPs? You can't just route the VM traffic to the
WRT router without SNAT on the virtual router, so make sure you set
that network to external.
I suspect that the problem here might be that the virtual router
was using the same IP as the WRT router, or that you were doing
routing without SNAT because the network wasn't marked as external.
> Dan Sneddon | Principal OpenStack Engineer |
> dsneddon(a)redhat.com <mailto:dsneddon@redhat.com>
On Mar 19, 2016, at 4:39 PM, John Alway <jalway(a)gmail.com
<mailto:jalway@gmail.com>> wrote:
> Hello,
>
> I'm still not able to get snat to work (connecting to the
> Internet) with my RDO all-in-one installation, and I'm wondering
> if my router is the issue.
>
> My router is a Linksys WRT54G, which does not support a "DHCP
> reservation" feature. I was able to set a fixed ip on it,
> because there is a range available from 192.168.1.2 through to
> 192.168.1.99, also 192.168.1.150 through 192.168.1.254.
>
> This is according to "toomanydonuts" posting here:
>
http://community.linksys.com/t5/Wireless-Routers/WRT54G-Static-IP-Questio...
>
> I've been using the lower address range. Could this be the
> problem, or should I look elsewhere?
>
> In my setup I have two private subnets, and three VMs. I can
> ping between the VMs, but can't ping the Internet. A virtual
> router connects the subnets and external network.
>
> I set up my external subnet as 192.168.1.0/28
> <http://192.168.1.0/28>;. I use the 28 to limit the range for my
> router. The external range is the same as my actual physical
> addresses on my LAN.
>
> I should add, I'm not a network guy. I'm learning a lot of
> networking on the fly here.
>
> Thanks for any feedback!!
> ...John
> _______________________________________________
> Rdo-list mailing list
> Rdo-list(a)redhat.com <mailto:Rdo-list@redhat.com>
> https://www.redhat.com/mailman/listinfo/rdo-list
>
> To unsubscribe: rdo-list-unsubscribe(a)redhat.com
> <mailto:rdo-list-unsubscribe@redhat.com>
The entry you are seeing for "Provider Network->Physical Network:
extnet" just references which physical network you are using. The
physical network name is related to the bridge mappings. The default
bridge mapping is "datacentre:br-ex", so when I create a Public network
with the default settings, the physical network is "datacentre". If you
have different bridge mappings, then you might have a different
physical network name.
The property I am referring to is "router:external=True", which I'm not
sure you can see in the Horizon dashboard. If you source "overcloudrc"
on the Undercloud and run "neutron net-list" and then "neutron net-show
<network>" on the external network, you will see this property, like this:
[stack@instack ~]$ neutron net-show public
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| id | 9959fc21-eaea-4cc8-bd72-0e711ca36cbe |
| mtu | 0 |
| name | public |
| provider:network_type | vlan |
| provider:physical_network | datacentre |
| provider:segmentation_id | 10 |
| router:external | True |
| shared | False |
| status | ACTIVE |
| subnets | e4948277-faa0-42c8-97f7-0095d1c20bfa |
| tenant_id | 497f8c12b2534fb08273f59c6c8ac2c6 |
+---------------------------+--------------------------------------+
The fact that you are trying to attach to "extnet" might be the
problem. Did you include a physical network to bridge mapping such as
"extnet:br-ex" when you deployed using the
--neutron-network-bridge-mappings CLI parameter?
You can check the settings in
/etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini on the
controller(s) to see what your bridge mappings are. This is the default:
bridge_mappings =datacentre:br-ex
When I create an external network, I use a command line such as this
(if the external net is on the native VLAN):
$ neutron net-create ext-net --router:external \
--provider:physical_network datacentre \
--provider:network_type flat
If the external net is on a VLAN, then I use a command like this:
$ neutron net-create ext-net --router:external \
--provider:physical_network datacentre \
--provider:network_type vlan \
--provider:segmentation_id 104
So double check to make sure that you have created the network with
--router:external, and that the physical network matches the bridge
mappings. If these things are out of sync, you will need to correct
that, and delete and recreate the network(s).
Once you have worked all that out, and you are sure that you have the
bridge mappings such that br-ex is hosting the external network, then
you can move on to some simple troubleshooting:
* Can you ping 192.168.1.1 from the namespace of the virtual router?
(use "ip netns list" and "ip netns exec <namespace> ping
192.168.1.1")
* Can you ping the virtual router on the external network from the WRT
router?
* Can you see the outbound packets on br-ex using "sudo tcpdump -i br-ex"?
--
Dan Sneddon | Principal OpenStack Engineer
dsneddon(a)redhat.com | redhat.com/openstack
650.254.4025 | dsneddon:irc @dxs:twitter
7:17 p.m.
[stack@instack ~]$ neutron net-show public
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| id | 9959fc21-eaea-4cc8-bd72-0e711ca36cbe |
| mtu | 0 |
| name | public |
| provider:network_type | vlan |
| provider:physical_network | datacentre |
| provider:segmentation_id | 10 |
| router:external | True |
| shared | False |
| status | ACTIVE |
| subnets | e4948277-faa0-42c8-97f7-0095d1c20bfa |
| tenant_id | 497f8c12b2534fb08273f59c6c8ac2c6 |
+---------------------------+--------------------------------------+
On Tue, Mar 22, 2016 at 1:03 PM, Dan Sneddon <dsneddon(a)redhat.com> wrote:
On 03/20/2016 12:11 PM, John Alway wrote:
> Dan,
>
> I set everything up the way you mentioned. The network I have labeled
> "external network" is marked as an "extnet". By which I mean,
in the
> Dashboard, under "Network Details" for my external network... It has
> an entry "Provider Network-> Physical Network: extnet".
>
> I allocated a pool in the range 192.168.1.13 to 192,168.1.99 (I did
> this because two of the computers on my physical network are
> 192.168.1.11 and 192.168.1.12).
>
> The virtual router has an IP address of 192.168.1.13 on the external
> network, and the public_subnet on the external network has a gateway of
> 192.168.1.2.
>
> You're right about my physical router. Its address is 192.168.1.1
>
> I tried pinging from a VM to the Internet, and it still fails.
>
> I then tried allocating floating IPs to a VM, and it still failed to
> ping the Internet.
>
> So, I'm still not solved
>
> Thanks for your feedback!
>
> Regards,
> ...John
>
>
>
> On Sat, Mar 19, 2016 at 9:58 PM, Dan Sneddon <dsneddon(a)redhat.com
> <mailto:dsneddon@redhat.com>> wrote:
>
> I don't think the range you are using is the problem, although you
> should be using 192.168.1.0/24 <http://192.168.1.0/24> as your
> subnet and 192.168.1.1 as the router gateway (assuming that the WRT
> is .1). You can set the allocation pool to a range like
> 192.168.1.10-192.168.1.99. Also, assuming your WRT router is .1,
> you will have to manually assign the virtual router IP (since the
> default is .1 when you create a router on a /24 network).
>
> You say that your VMs are connected through a virtual router. Are
> you using floating IPs? You can't just route the VM traffic to the
> WRT router without SNAT on the virtual router, so make sure you set
> that network to external.
>
> I suspect that the problem here might be that the virtual router
> was using the same IP as the WRT router, or that you were doing
> routing without SNAT because the network wasn't marked as external.
>
>> Dan Sneddon | Principal OpenStack Engineer |
>> dsneddon(a)redhat.com <mailto:dsneddon@redhat.com>
>
> On Mar 19, 2016, at 4:39 PM, John Alway <jalway(a)gmail.com
> <mailto:jalway@gmail.com>> wrote:
>
>> Hello,
>>
>> I'm still not able to get snat to work (connecting to the
>> Internet) with my RDO all-in-one installation, and I'm wondering
>> if my router is the issue.
>>
>> My router is a Linksys WRT54G, which does not support a "DHCP
>> reservation" feature. I was able to set a fixed ip on it,
>> because there is a range available from 192.168.1.2 through to
>> 192.168.1.99, also 192.168.1.150 through 192.168.1.254.
>>
>> This is according to "toomanydonuts" posting here:
>>
http://community.linksys.com/t5/Wireless-Routers/WRT54G-Static-IP-Questio...
>>
>> I've been using the lower address range. Could this be the
>> problem, or should I look elsewhere?
>>
>> In my setup I have two private subnets, and three VMs. I can
>> ping between the VMs, but can't ping the Internet. A virtual
>> router connects the subnets and external network.
>>
>> I set up my external subnet as 192.168.1.0/28
>> <http://192.168.1.0/28>;. I use the 28 to limit the range for my
>> router. The external range is the same as my actual physical
>> addresses on my LAN.
>>
>> I should add, I'm not a network guy. I'm learning a lot of
>> networking on the fly here.
>>
>> Thanks for any feedback!!
>> ...John
>> _______________________________________________
>> Rdo-list mailing list
>> Rdo-list(a)redhat.com <mailto:Rdo-list@redhat.com>
>> https://www.redhat.com/mailman/listinfo/rdo-list
>>
>> To unsubscribe: rdo-list-unsubscribe(a)redhat.com
>> <mailto:rdo-list-unsubscribe@redhat.com>
>
>
The entry you are seeing for "Provider Network->Physical Network:
extnet" just references which physical network you are using. The
physical network name is related to the bridge mappings. The default
bridge mapping is "datacentre:br-ex", so when I create a Public network
with the default settings, the physical network is "datacentre". If you
have different bridge mappings, then you might have a different
physical network name.
The property I am referring to is "router:external=True", which I'm not
sure you can see in the Horizon dashboard. If you source "overcloudrc"
on the Undercloud and run "neutron net-list" and then "neutron net-show
<network>" on the external network, you will see this property, like this:
[stack@instack ~]$ neutron net-show public
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| id | 9959fc21-eaea-4cc8-bd72-0e711ca36cbe |
| mtu | 0 |
| name | public |
| provider:network_type | vlan |
| provider:physical_network | datacentre |
| provider:segmentation_id | 10 |
| router:external | True |
| shared | False |
| status | ACTIVE |
| subnets | e4948277-faa0-42c8-97f7-0095d1c20bfa |
| tenant_id | 497f8c12b2534fb08273f59c6c8ac2c6 |
+---------------------------+--------------------------------------+
I have an rdo all-in-one set up right now, and don't have a "Overcloudrc".
I source "keystonerc_admin".
I sourced it and checked the "neutron net-show external_network" and the
"router:external" network entry does show "True".
The fact that you are trying to attach to "extnet" might be the
problem. Did you include a physical network to bridge mapping such as
"extnet:br-ex" when you deployed using the
--neutron-network-bridge-mappings CLI parameter?
You can check the settings in
/etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini on the
controller(s) to see what your bridge mappings are. This is the default:
bridge_mappings =datacentre:br-ex
I can't find that file. I have an "/etc/neutron/plugins/ml2"
directory, and inside of that there is the file "openvswitch_agent.ini".
I checked "openvswitch_agent.ini" and it has the following entry:
bridge_mappings = extnet:br-ex
When I create an external network, I use a command line such as this
(if the external net is on the native VLAN):
$ neutron net-create ext-net --router:external \
--provider:physical_network datacentre \
--provider:network_type flat
If the external net is on a VLAN, then I use a command like this:
$ neutron net-create ext-net --router:external \
--provider:physical_network datacentre \
--provider:network_type vlan \
--provider:segmentation_id 104
Mine is set up with a "provider:network_type: flat"
I assume that's right. I'm not 100% sure. According to my research,
"VLAN" is distinguished from "native VLAN" by "tagging" or
"trunking". I
assume mine is native.
So double check to make sure that you have created the network with
--router:external, and that the physical network matches the bridge
mappings. If these things are out of sync, you will need to correct
that, and delete and recreate the network(s).
Once you have worked all that out, and you are sure that you have the
bridge mappings such that br-ex is hosting the external network, then
you can move on to some simple troubleshooting:
* Can you ping 192.168.1.1 from the namespace of the virtual router?
(use "ip netns list" and "ip netns exec <namespace> ping
192.168.1.1")
This fails!
I get a "Destination Host Unreachable" result.
* Can you ping the virtual router on the external network from the WRT
router?
I pinged 192.168.1.13, which is the virtual router's gateway to the
external network, and it pings fine.
* Can you see the outbound packets on br-ex using "sudo tcpdump -i br-ex"?
Btw, I'm on CentOS. I believe so. Just learning how to do this.
For example, I see 192.168.1.12.5280 > 173.194.204.106.80, which I
believe is outbound.
I also have settings for security as follows: "All" for TCP, UDP and
ICMP, egress and ingress.
So, somehow pinging from virtual router to the physical gateway fails.
regards,
...John
--
Dan Sneddon | Principal OpenStack Engineer
dsneddon(a)redhat.com | redhat.com/openstack
650.254.4025 | dsneddon:irc @dxs:twitter
7:48 p.m.
On 03/22/2016 05:17 PM, John Alway wrote:
[stack@instack ~]$ neutron net-show public
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| id | 9959fc21-eaea-4cc8-bd72-0e711ca36cbe |
| mtu | 0 |
| name | public |
| provider:network_type | vlan |
| provider:physical_network | datacentre |
| provider:segmentation_id | 10 |
| router:external | True |
| shared | False |
| status | ACTIVE |
| subnets | e4948277-faa0-42c8-97f7-0095d1c20bfa |
| tenant_id | 497f8c12b2534fb08273f59c6c8ac2c6 |
+---------------------------+--------------------------------------+
On Tue, Mar 22, 2016 at 1:03 PM, Dan Sneddon <dsneddon(a)redhat.com
<mailto:dsneddon@redhat.com>> wrote:
On 03/20/2016 12:11 PM, John Alway wrote:
> Dan,
>
> I set everything up the way you mentioned. The network I have labeled
> "external network" is marked as an "extnet". By which I
mean, in the
> Dashboard, under "Network Details" for my external network... It has
> an entry "Provider Network-> Physical Network: extnet".
>
> I allocated a pool in the range 192.168.1.13 to 192,168.1.99 (I did
> this because two of the computers on my physical network are
> 192.168.1.11 and 192.168.1.12).
>
> The virtual router has an IP address of 192.168.1.13 on the external
> network, and the public_subnet on the external network has a gateway of
> 192.168.1.2.
>
> You're right about my physical router. Its address is 192.168.1.1
>
> I tried pinging from a VM to the Internet, and it still fails.
>
> I then tried allocating floating IPs to a VM, and it still failed to
> ping the Internet.
>
> So, I'm still not solved
>
> Thanks for your feedback!
>
> Regards,
> ...John
>
>
>
> On Sat, Mar 19, 2016 at 9:58 PM, Dan Sneddon <dsneddon(a)redhat.com
<mailto:dsneddon@redhat.com>
> <mailto:dsneddon@redhat.com <mailto:dsneddon@redhat.com>>>
wrote:
>
> I don't think the range you are using is the problem, although you
> should be using 192.168.1.0/24 <http://192.168.1.0/24>
<http://192.168.1.0/24> as your
> subnet and 192.168.1.1 as the router gateway (assuming that the WRT
> is .1). You can set the allocation pool to a range like
> 192.168.1.10-192.168.1.99. Also, assuming your WRT router is .1,
> you will have to manually assign the virtual router IP (since the
> default is .1 when you create a router on a /24 network).
>
> You say that your VMs are connected through a virtual router. Are
> you using floating IPs? You can't just route the VM traffic to the
> WRT router without SNAT on the virtual router, so make sure you set
> that network to external.
>
> I suspect that the problem here might be that the virtual router
> was using the same IP as the WRT router, or that you were doing
> routing without SNAT because the network wasn't marked as external.
>
>> Dan Sneddon | Principal OpenStack Engineer |
>> dsneddon(a)redhat.com <mailto:dsneddon@redhat.com>
<mailto:dsneddon@redhat.com <mailto:dsneddon@redhat.com>>
>
> On Mar 19, 2016, at 4:39 PM, John Alway <jalway(a)gmail.com
<mailto:jalway@gmail.com>
> <mailto:jalway@gmail.com <mailto:jalway@gmail.com>>> wrote:
>
>> Hello,
>>
>> I'm still not able to get snat to work (connecting to the
>> Internet) with my RDO all-in-one installation, and I'm wondering
>> if my router is the issue.
>>
>> My router is a Linksys WRT54G, which does not support a "DHCP
>> reservation" feature. I was able to set a fixed ip on it,
>> because there is a range available from 192.168.1.2 through to
>> 192.168.1.99, also 192.168.1.150 through 192.168.1.254.
>>
>> This is according to "toomanydonuts" posting here:
>>
http://community.linksys.com/t5/Wireless-Routers/WRT54G-Static-IP-Questio...
>>
>> I've been using the lower address range. Could this be the
>> problem, or should I look elsewhere?
>>
>> In my setup I have two private subnets, and three VMs. I can
>> ping between the VMs, but can't ping the Internet. A virtual
>> router connects the subnets and external network.
>>
>> I set up my external subnet as 192.168.1.0/28
<http://192.168.1.0/28>
>> <http://192.168.1.0/28>;. I use the 28 to limit the range for my
>> router. The external range is the same as my actual physical
>> addresses on my LAN.
>>
>> I should add, I'm not a network guy. I'm learning a lot of
>> networking on the fly here.
>>
>> Thanks for any feedback!!
>> ...John
>> _______________________________________________
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<mailto:Rdo-list@redhat.com <mailto:Rdo-list@redhat.com>>
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>
>
The entry you are seeing for "Provider Network->Physical Network:
extnet" just references which physical network you are using. The
physical network name is related to the bridge mappings. The default
bridge mapping is "datacentre:br-ex", so when I create a Public network
with the default settings, the physical network is "datacentre". If you
have different bridge mappings, then you might have a different
physical network name.
The property I am referring to is "router:external=True", which I'm
not
sure you can see in the Horizon dashboard. If you source "overcloudrc"
on the Undercloud and run "neutron net-list" and then "neutron
net-show
<network>" on the external network, you will see this property,
like this:
[stack@instack ~]$ neutron net-show public
+---------------------------+--------------------------------------+
| Field | Value |
+---------------------------+--------------------------------------+
| admin_state_up | True |
| id | 9959fc21-eaea-4cc8-bd72-0e711ca36cbe |
| mtu | 0 |
| name | public |
| provider:network_type | vlan |
| provider:physical_network | datacentre |
| provider:segmentation_id | 10 |
| router:external | True |
| shared | False |
| status | ACTIVE |
| subnets | e4948277-faa0-42c8-97f7-0095d1c20bfa |
| tenant_id | 497f8c12b2534fb08273f59c6c8ac2c6 |
+---------------------------+--------------------------------------+
I have an rdo all-in-one set up right now, and don't have a
"Overcloudrc". I source "keystonerc_admin".
I sourced it and checked the "neutron net-show external_network" and
the "router:external" network entry does show "True".
The fact that you are trying to attach to "extnet" might be the
problem. Did you include a physical network to bridge mapping such as
"extnet:br-ex" when you deployed using the
--neutron-network-bridge-mappings CLI parameter?
You can check the settings in
/etc/neutron/plugins/openvswitch/ovs_neutron_plugin.ini on the
controller(s) to see what your bridge mappings are. This is the
default:
bridge_mappings =datacentre:br-ex
I can't find that file. I have an "/etc/neutron/plugins/ml2"
directory, and inside of that there is the file
"openvswitch_agent.ini". I checked "openvswitch_agent.ini" and it
has the following entry:
bridge_mappings = extnet:br-ex
When I create an external network, I use a command line such as this
(if the external net is on the native VLAN):
$ neutron net-create ext-net --router:external \
--provider:physical_network datacentre \
--provider:network_type flat
If the external net is on a VLAN, then I use a command like this:
$ neutron net-create ext-net --router:external \
--provider:physical_network datacentre \
--provider:network_type vlan \
--provider:segmentation_id 104
Mine is set up with a "provider:network_type: flat"
I assume that's right. I'm not 100% sure. According to my
research, "VLAN" is distinguished from "native VLAN" by
"tagging" or
"trunking". I assume mine is native.
So double check to make sure that you have created the network with
--router:external, and that the physical network matches the bridge
mappings. If these things are out of sync, you will need to correct
that, and delete and recreate the network(s).
Once you have worked all that out, and you are sure that you have the
bridge mappings such that br-ex is hosting the external network, then
you can move on to some simple troubleshooting:
* Can you ping 192.168.1.1 from the namespace of the virtual router?
(use "ip netns list" and "ip netns exec <namespace> ping
192.168.1.1")
This fails!
I get a "Destination Host Unreachable" result.
* Can you ping the virtual router on the external network from the WRT
router?
I pinged 192.168.1.13, which is the virtual router's gateway to the
external network, and it pings fine.
* Can you see the outbound packets on br-ex using "sudo tcpdump -i
br-ex"?
Btw, I'm on CentOS. I believe so. Just learning how to do
this. For example, I see 192.168.1.12.5280 > 173.194.204.106.80,
which I believe is outbound.
I also have settings for security as follows: "All" for TCP, UDP
and ICMP, egress and ingress.
So, somehow pinging from virtual router to the physical gateway fails.
regards,
...John
--
Dan Sneddon | Principal OpenStack Engineer
dsneddon(a)redhat.com <mailto:dsneddon@redhat.com> |
redhat.com/openstack <http://redhat.com/openstack>
650.254.4025 <tel:650.254.4025> | dsneddon:irc @dxs:twitter
I didn't realize that you were on Packstack. The default external
network bridge mapping is created with the name "extnet" on Packstack.
Since you have extnet:br-ex, then your external network should have
provider:physical_network: extnet, provider:network_type: flat, and
provider:segmentation_id: null.
Did you recreate your subnet so that it is 192.168.1.0/24 instead of
192.168.1.0/28?
Being able to reach the gateway from the virtual router is a pretty
basic connectivity check, so if your WRT is accepting pings I would
focus on trying to get that to work (or maybe ping is blocked and you
have more connectivity than you realize).
--
Dan Sneddon | Principal OpenStack Engineer
dsneddon(a)redhat.com | redhat.com/openstack
650.254.4025 | dsneddon:irc @dxs:twitter
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