Bug 1966833

Summary:	[OVN] Pods can not receive multicast from other pods which are in the same namespace but different node
Product:	OpenShift Container Platform	Reporter:	Weibin Liang <weliang>
Component:	Networking	Assignee:	Andrew Stoycos <astoycos>
Networking sub component:	ovn-kubernetes	QA Contact:	Weibin Liang <weliang>
Status:	CLOSED ERRATA	Docs Contact:
Severity:	urgent
Priority:	high	CC:	aconstan, talessio
Version:	4.6.z
Target Milestone:	---
Target Release:	4.6.z
Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2021-07-14 07:16:34 UTC	Type:	Bug
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:	1931520
Bug Blocks:

Description Weibin Liang 2021-06-02 01:54:56 UTC

Description of problem:
Pods can not receive multicast from other pods which are in the same namespace but different node.

Version-Release number of selected component (if applicable):
4.6.17 and 4.6.0-0.nightly-2021-05-31-074224

How reproducible:
Always

Steps to Reproduce:
1.oc new-project  multicast-test
2.oc annotate namespace multicast-test k8s.ovn.org/multicast-enabled="true"
3.oc create -f https://raw.githubusercontent.com/weliang1/Openshift_Networking/master/Features/Pod/multicast-pod.yaml
4.Run below cmd in the two pods which are int the different nodes:
omping -m 239.255.254.24 $pod1IP $pod2IP

Actual results:
Pods can not receive multicast from other pods which are in the same namespace but different node.

Expected results:
Both pods can join multicast group 239.255.254.24 and receive muticast traffic


Additional info:

Comment 3 Weibin Liang 2021-06-10 13:07:09 UTC

This issue has been fixed in https://bugzilla.redhat.com/show_bug.cgi?id=1843695 for 4.5 release

Comment 7 Weibin Liang 2021-06-30 17:43:39 UTC

Tested and verified in 4.6.0-0.nightly-2021-06-25-031210

Comment 12 errata-xmlrpc 2021-07-14 07:16:34 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 (OpenShift Container Platform 4.6.38 bug fix update), 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/RHBA-2021:2641