Public bug reported: Using stateless NAT in OVN should always be a better choice for FIPs because it allows to avoid hitting conntrack, potentially improving NAT performance. In particular, a DPDK deployment could improve its performance by avoiding the NAT rules to hit the conntrack table.
This functionality was added to core OVN in [1] and was released in v20.03.0. NOTE: this functionality was integrated in Neutron in [2] and reverted in [3]. This functionality was impacting seriously in the HW offloaded environments because it was impossible to fully offload all NAT rules. This RFE instead proposes to implement the same feature but conditional via config parameter in the Neutron API configuration file. [1]https://github.com/ovn-org/ovn/commit/5b7cc608c0c7b4b862bcb208f57a3086af6cce8a [2]https://review.opendev.org/c/openstack/neutron/+/804807 [3]https://review.opendev.org/c/openstack/neutron/+/838776 ** Affects: neutron Importance: Wishlist Assignee: Rodolfo Alonso (rodolfo-alonso-hernandez) Status: New ** Tags: rfe ** Changed in: neutron Assignee: (unassigned) => Rodolfo Alonso (rodolfo-alonso-hernandez) ** Changed in: neutron Importance: Undecided => Wishlist ** Tags added: rfe -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to neutron. https://bugs.launchpad.net/bugs/2111899 Title: [RFE] Use stateless NAT rules for FIPs Status in neutron: New Bug description: Using stateless NAT in OVN should always be a better choice for FIPs because it allows to avoid hitting conntrack, potentially improving NAT performance. In particular, a DPDK deployment could improve its performance by avoiding the NAT rules to hit the conntrack table. This functionality was added to core OVN in [1] and was released in v20.03.0. NOTE: this functionality was integrated in Neutron in [2] and reverted in [3]. This functionality was impacting seriously in the HW offloaded environments because it was impossible to fully offload all NAT rules. This RFE instead proposes to implement the same feature but conditional via config parameter in the Neutron API configuration file. [1]https://github.com/ovn-org/ovn/commit/5b7cc608c0c7b4b862bcb208f57a3086af6cce8a [2]https://review.opendev.org/c/openstack/neutron/+/804807 [3]https://review.opendev.org/c/openstack/neutron/+/838776 To manage notifications about this bug go to: https://bugs.launchpad.net/neutron/+bug/2111899/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : [email protected] Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp
