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Bug 2374279

Summary:	Ceph Dashboard raises a MTU mismatch alert when not expected
Product:	[Red Hat Storage] Red Hat Ceph Storage	Reporter:	Rodrigo Capa <rocapa>
Component:	Ceph-Dashboard	Assignee:	Aashish sharma <aasharma>
Status:	CLOSED ERRATA	QA Contact:	Vinayak Papnoi <vpapnoi>
Severity:	medium	Docs Contact:	Rivka Pollack <rpollack>
Priority:	unspecified
Version:	6.1	CC:	aasharma, ceph-eng-bugs, cephqe-warriors, pegonzal
Target Milestone:	---
Target Release:	9.0
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	ceph-20.1.0-30	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2026-01-29 06:50:26 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:

Description Rodrigo Capa 2025-06-23 09:25:13 UTC

Description of problem:
There are multiple warnings on the Dashboard related to MTU mismatch on different interfaces:

Node <node> has a different MTU size (9000) than the median of devices named <interface>.

Cluster is four nodes, and one node has a different assigned interface than the others.


Version-Release number of selected component (if applicable):
Quincy 17.2.6-246.el9cp / 6.1.7 / 6.1.8


How reproducible:
Probably simulating the interface configuration of a cluster

Steps to Reproduce:


Actual results:
Alerts are presented for all the interfaces while it's confirmed that configured MTU sizes are the same, EXCEPT for one interface.

Expected results:
Only one alert should be presented on current configuration

Additional info:
It's expected that the customer will change the assigned interface for the discrepant node.

Comment 13 Rodrigo Capa 2025-07-08 06:05:47 UTC

Hello  Aashish,

I attach a screen capture with the details of the query.

Best regards,
Rodrigo

Comment 18 Aashish sharma 2025-07-08 06:28:32 UTC

Thanks again for the info, will update the bz soon.

Comment 35 errata-xmlrpc 2026-01-29 06:50:26 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 (Moderate: Red Hat Ceph Storage 9.0 Security and Enhancement 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/RHSA-2026:1536