> From: Carl Baldwin <c...@ecbaldwin.net> > To: Dan Sneddon <dsned...@redhat.com> > Cc: Matt Kassawara <mkassaw...@gmail.com>, Mike Spreitzer/Watson/ > IBM@IBMUS, "openstack-operators@lists.openstack.org" <openstack- > operat...@lists.openstack.org> > Date: 01/14/2016 10:59 AM > Subject: Re: [Openstack-operators] [neutron] Routing to tenant networks > ... > > I'd discourage the use of 100.64.0.0/10 for any tenant networks. > Quoted the RFC [1]: "This address block will be called the "Shared > Address Space" and will be used to number the interfaces that connect > CGN devices to Customer Premises Equipment (CPE)." and "In particular, > Shared Address Space can only be used in Service Provider networks or > on routing equipment that is able to do address translation across > router interfaces when the addresses are identical on two different > interfaces." It isn't spelled out clearly, but this hints at only > using these addresses on infrastructure devices used in service > providers' networks. The closest this would get to a customer is > assigning the router at the customer's edge an address from this range > (like your home router's external address). These devices pass > packets and use the shared address space to communicate with other > devices in the service provider's network but these addresses are > never seen by the end user in the packets that reach their devices. ...
I think OpenStack's position should be that it is the operator's choice how to assign/use addresses. And OpenStack's advice to the operators should be to follow the RFC (duh!). Thanks, Mike
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