Bug 1854084

Summary: [OSP16.1.][OVN][Fragmentation][ipv4] 100% packet loss on attempt to send UDP/ICMP packets above MTU size
Product: Red Hat OpenStack Reporter: Roman Safronov <rsafrono>
Component: python-networking-ovnAssignee: Lucas Alvares Gomes <lmartins>
Status: CLOSED ERRATA QA Contact: Roman Safronov <rsafrono>
Severity: high Docs Contact:
Priority: high    
Version: 16.1 (Train)CC: apevec, ctrautma, dalvarez, jamsmith, jishi, jlibosva, lhh, lmartins, lorenzo.bianconi, majopela, mcambria, nusiddiq, ralongi, scohen
Target Milestone: z2Keywords: TestOnly, Triaged
Target Release: 16.1 (Train on RHEL 8.2)   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: No Doc Update
Doc Text:
Story Points: ---
Clone Of: 1833813 Environment:
Last Closed: 2020-10-28 15:38:12 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: 1833813    
Bug Blocks: 1547074    

Comment 4 Jakub Libosvar 2020-09-29 17:26:16 UTC 
There is nothing required from the dev side in networking-ovn, moving back to ON_QA
Comment 5 Roman Safronov 2020-09-30 12:46:21 UTC 
Tested on RHOS-16.1-RHEL-8-20200925.n.1 with kernel manually updated on all overcloud nodes to kernel-4.18.0-193.20.1.el8_2 (AFAIU not released yet, according to https://bugzilla.redhat.com/show_bug.cgi?id=1860169 GA planned to 2020-10-20)

With updated kernel (kernel-4.18.0-193.20.1.el8_2) udp fragmentation worked. With default kernel (4.18.0-193.19.1.el8_2.x86_64) fragmentation did not work.
Comment 12 errata-xmlrpc 2020-10-28 15:38:12 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (Red Hat OpenStack Platform 16.1 bug fix and enhancement advisory), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHEA-2020:4284