OpenStack Summit May 2015 Vancouver has ended
Back To Schedule
Thursday, May 21 • 3:10pm - 3:50pm
IPv6 impact on Neutron L3 High Availability

Sign up or log in to save this to your schedule, view media, leave feedback and see who's attending!

In OpenStack Juno release, L3 high availability in Neutron is implemented using Keepalived, which internally uses the VRRP protocol. It is an active/passive solution where a Keepalived instance is spawned in every router namespace and the instances communicate via a dedicated high-availability network, creating one per tenant.

The IP addresses that are used in the setup (e.g., qg, qr, floating IPs) would all be virtual IP addresses and would be assigned by the Keepalived daemon to the appropriate interfaces on the master high-availability router. In an IPv4 network, after a failover, the standby router sends a gratuitous ARP to have the switches update the port info. While this is required in an IPv4 network, the same is not necessary in an IPv6 network, thanks to IPv6 router advertisements.

In this presentation, we will share our observations on how to make L3 high availability (with Keepalived) work with IPv6 networks. The talk will include:

  • A brief introduction to Keepalived.

  • Why and what changes are required for IPv6.

  • Current status in Neutron.

  • Pending/open issues like TCP conntrack, monitoring the external link, etc.


avatar for Sridhar Gaddam

Sridhar Gaddam

Senior Principal Software Engineer, Red Hat
Sridhar Gaddam works for Red Hat as a Principal Software Engineer and has more than 16 years of experience. Sridhar has been working on OpenStack, OpenDaylight (core member) and OPNFV projects for the last couple of years and is primarily focused in the areas of Networking.
avatar for Numan Siddique

Numan Siddique

Openstack Developer, eNovance, From Red Hat
  Numan Siddique is a developer at eNovance, from Redhat. He has 10 years of software development experience. He has been involved with OpenStack for a year now and works mainly on Neutron and OpenContrail SDN controller. 

Thursday May 21, 2015 3:10pm - 3:50pm PDT
Room 118/119/120

Attendees (1)