Open Stack

----- Original Message -----
> From: "Alvise Dorigo" <alvise.dorigo at pd.infn.it>

> > 
> > Red Hat Enterprise Linux OpenStack Platform 3 is Grizzly based (hence the
> > documentation for that version still correctly refers to Quantum), 4 is
> > Havana based. Both are fully (and concurrently) supported.
> 
> Hi Steve, Sankarshan,
> 
> I'm following the guide "4" for Havana. For what concern Neutron, everything
> works smooth until the section 13.6 "Configuring an external provider
> network". I execute these steps as described there:
> 
> neutron net-create EXTERNAL_NAME --router:external True
> --provider:network_type TYPE --provider:physical_network PHYSICAL_NAME
> --provider:segmentation_id VLAN_TAG
> (OK)
> 
> neutron subnet-create --gateway GATEWAY --allocation-pool
> start=IP_RANGE_START,end=IP_RANGE_END --disable-dhcp EXTERNAL_NAME
> EXTERNAL_CIDR
> (OK)
> 
> neutron router-create NAME
> (OK)
> 
> neutron router-gateway-set ROUTER NETWORK
> (OK)
> 
> (of course I replaced the labels with the proper names, IPs, ID, etc...)
> 
> The last command of section 13.6 fails:
> 
> neutron router-interface-add myRouter dc8ea9c9-c737-4ab3-8abb-f62284b078f8
> 400-{u'NeutronError': {u'message': u'Bad router request: Router already has a
> port on subnet dc8ea9c9-c737-4ab3-8abb-f62284b078f8', u'type':
> u'BadRequest', u'detail': u''}}
> 
> 
> This is my net and subnet list:
> 
> bash-4.1$ neutron net-list
> +--------------------------------------+---------+-------------------------------------------------------+
> | id                                   | name    | subnets
> | |
> +--------------------------------------+---------+-------------------------------------------------------+
> | 6f0b45e1-143f-4c1c-acb4-414210e9dbb9 | esterna |
> | dc8ea9c9-c737-4ab3-8abb-f62284b078f8 192.168.120.0/24 |
> +--------------------------------------+---------+-------------------------------------------------------+
> bash-4.1$ neutron subnet-list
> +--------------------------------------+----------------+------------------+--------------------------------------------------------+
> | id                                   | name           | cidr             |
> | allocation_pools                                       |
> +--------------------------------------+----------------+------------------+--------------------------------------------------------+
> | dc8ea9c9-c737-4ab3-8abb-f62284b078f8 | subnet_externa | 192.168.120.0/24 |
> | {"start": "192.168.120.100", "end": "192.168.120.150"} |
> +--------------------------------------+----------------+------------------+--------------------------------------------------------+
> 
> I've never execute an interface-add for myRouter before, but it says that
> "Router already has a port".
> 
> What am I doing wrong ?
> 
> thanks,

Hi again,

Apologies for the delayed response - I believe the issue is that when you issue the "neutron router-gateway-set" command you connect the router to the external network and, implicitly, the subnet associated with it. 

It's then expected that when you issue the "neutron router-interface-add" command in 13.6 you are adding *additional* private subnets to the router (not the external subnet) - though admittedly this isn't immediately obvious.

Thanks,

Steve