Hi Arzhel, now that our BGP thing is mostly working, I think we can move forward with IPv6 for codfw1dev, which was my original intention before doing anything related to BGP :-P We would need to: * allocate a small IPv6 prefix for the transport network (between cr-codfw and the neutron virtual router). I'm open to suggestion to the size of this subnet. * allocate a big IPv6 prefix that we could use internally inside the cloud environment (for VMs). This should probably be a /48? I'm not sure yet if I would be doing subnetting of this big prefix and allocate smaller ones (/64) per project, or if we will be using the big one directly without sub-delegation. (Something to research anyway). I will follow-up next week. For the record, doing this research and design is one my goals/OKRs for this quarter (3 week left!). My plan is to use this wikitech page as my deliverable: https://wikitech.wikimedia.org/wiki/Wikimedia_Cloud_Services_team/Enhanceme… regards. -- Arturo Borrero Gonzalez SRE / Wikimedia Cloud Services Wikimedia Foundation