Bug 1881697

Summary: [OVN][RFE] Add support for VXLAN tunnels for interchassis communication
Product: Red Hat OpenStack Reporter: Ihar Hrachyshka <ihrachys>
Component: openstack-tripleo-heat-templatesAssignee: Slawek Kaplonski <skaplons>
Status: CLOSED CURRENTRELEASE QA Contact: Eduardo Olivares <eolivare>
Severity: high Docs Contact:
Priority: high    
Version: 17.0 (Wallaby)CC: apevec, avishnoi, chrisw, ctrautma, dalvarez, ekuris, eolivare, jamsmith, jishi, jmelvin, lhh, majopela, mburns, ralongi, scohen, shrjoshi, skaplons, tfreger
Target Milestone: z1Keywords: FutureFeature, TestOnly
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: openstack-tripleo-heat-templates-11.5.1-2.20210518084809.el8ost Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: 1841526
: 1881704 1916092 2128735 (view as bug list) Environment:
Last Closed: 2022-08-02 10:36:04 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1841526    
Bug Blocks: 1881704, 1916091, 1916092, 2128735    

Description Ihar Hrachyshka 2020-09-22 22:04:13 UTC 
+++ This bug was initially created as a clone of Bug #1841526 +++

Description of problem: right now VXLAN is not supported by OVN for regular inter-chassis communication. There is VXLAN support for "vtep" ovsdb schema compliant external switches (aka ramp switches). This RFE is to extend core OVN to support VXLAN for regular in-cluster traffic.

Initial upstream discussion: https://www.mail-archive.com/ovs-discuss@openvswitch.org/msg06771.html
Demo implementation: https://patchwork.ozlabs.org/project/openvswitch/patch/20200320050711.247351-1-ihrachys@redhat.com/

Related links:
https://blog.russellbryant.net/2017/05/30/ovn-geneve-vs-vxlan-does-it-matter/

Core OVN work is tracked in bug 1841526. This bug is to adjust Neutron to support the new network type for OVN driver. There are two elements to it:

1) allow VXLAN type (as simple as https://review.opendev.org/734889);
2) read max_tunid from NB_Global object and use it to adjust vni_ranges used by VXLAN type driver.

Since max_tunid is written in the latest OVN only, its presence can be used as a tag that VXLAN support is present.
Comment 3 Kamil Sambor 2021-02-23 10:35:55 UTC 
*** Bug 1916091 has been marked as a duplicate of this bug. ***
Comment 4 Kamil Sambor 2021-02-23 10:46:24 UTC 
*** Bug 1916092 has been marked as a duplicate of this bug. ***
Comment 12 Thierry Vignaud 2021-10-14 15:56:11 UTC 
According to our records, this should be resolved by openstack-tripleo-heat-templates-11.5.1-2.20210603174823.el8ost.9.  This build is available now.