neutron guide OVS + provider nets section lacks IPv6 gateway

[Mike Spreitzer]

I am not sure whether this is a doc bug or a script bug or both.

In the localrc contents exhibited at http://docs.openstack.org/developer/devstack/guides/neutron.html#id2
there is no mention of any IPv6 gateways, nor is there a restriction of IP_VERSION to 4.
In Liberty the default is 4+6, but the DevStack scripts do not supply a default value for the needed gateway
nor the needed network name.
The result is that when running stack.sh against the localrc contents exhibited there to create the controller,
on exactly the "physical network setup" described in that section,
the creation of the provider IPv6 subnet fails; following is a quote from stack.sh output:

2015-10-20 06:16:01.982 | ++ neutron subnet-create --tenant_id 2f2e3b018cd548ab81331acb4e7b6869 --ip_version 6 --ipv6-address-mode slaac --gateway --name 6f188b9a-60fd-4006-a865-c3fd7ba551b0 fd25:6d3b:944b::/64
2015-10-20 06:16:01.995 | ++ get_field 2
2015-10-20 06:16:01.996 | ++ local data field
2015-10-20 06:16:01.996 | ++ read data
2015-10-20 06:16:02.000 | ++ grep id
2015-10-20 06:16:02.716 | usage: neutron subnet-create [-h]
2015-10-20 06:16:02.716 | [-f {html,json,json,shell,table,value,yaml,yaml}]
2015-10-20 06:16:02.717 | [-c COLUMN] [--max-width <integer>] [--noindent]
2015-10-20 06:16:02.717 | [--prefix PREFIX] [--request-format {json,xml}]
2015-10-20 06:16:02.717 | [--tenant-id TENANT_ID] [--name NAME]
2015-10-20 06:16:02.717 | [--gateway GATEWAY_IP | --no-gateway]
2015-10-20 06:16:02.717 | [--allocation-pool start=IP_ADDR,end=IP_ADDR]
2015-10-20 06:16:02.717 | [--host-route destination=CIDR,nexthop=IP_ADDR]
2015-10-20 06:16:02.717 | [--dns-nameserver DNS_NAMESERVER]
2015-10-20 06:16:02.717 | [--disable-dhcp] [--enable-dhcp]
2015-10-20 06:16:02.717 | [--ip-version {4,6}]
2015-10-20 06:16:02.717 | [--ipv6-ra-mode {dhcpv6-stateful,dhcpv6-stateless,slaac}]
2015-10-20 06:16:02.717 | [--ipv6-address-mode {dhcpv6-stateful,dhcpv6-stateless,slaac}]
2015-10-20 06:16:02.717 | [--subnetpool SUBNETPOOL]
2015-10-20 06:16:02.717 | [--prefixlen PREFIX_LENGTH]
2015-10-20 06:16:02.717 | NETWORK [CIDR]
2015-10-20 06:16:02.717 | neutron subnet-create: error: argument --gateway: expected one argument

[Mike Spreitzer (mike-spreitzer)]

BTW, I did my testing on Ubuntu 14.04.03 after a recent `apt-get update; apt-get upgrade`.

[Sean Dague (sdague)]

This devstack bug was last updated over 180 days ago, as devstack
is a fast moving project and we'd like to get the tracker down to
currently actionable bugs, this is getting marked as Invalid. If the
issue still exists, please feel free to reopen it.