Bug 2040815

Summary:	[RFE] Add MTU Oversize Message To OVS
Product:	Red Hat Enterprise Linux Fast Datapath	Reporter:	Jamie Fargen <jfargen>
Component:	openvswitch	Assignee:	Maxime Coquelin <maxime.coquelin>
openvswitch sub component:	daemons and tools	QA Contact:	qding
Status:	CLOSED MIGRATED	Docs Contact:
Severity:	medium
Priority:	unspecified	CC:	ctrautma, fleitner, guilherme.giacon, jfargen, jhsiao, john.choo
Version:	RHEL 8.0
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Hardware:	All
OS:	Linux
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Last Closed:	2024-03-12 11:50:02 UTC	Type:	Bug
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
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Embargoed:

Description Jamie Fargen 2022-01-14 18:28:54 UTC

Description of problem:
There is no log message generated in the case of an ovs port, bridge, etc which drops a packet because of an oversize MTU.


How reproducible:
Create a KVM instance using the Virtio driver and configure the MTU larger than bridge or port the instance is attached and send packets larger than this egress interface. Nothing will be logged on the KVM hypervisor.

Expected results:
Expect the hypervisor to log a message to kernel ring buffer.

Additional info:
There has been some work suggested for other driver like the Intel i40 driver.
https://www.spinics.net/lists/netdev/msg719280.html

Comment 2 Eelco Chaudron 2022-11-16 10:49:03 UTC

So I assume this needs to be assigned to the hypervisor team? Or do we need something specific from the kernel driver, then it needs to go to the Kernel team?

Maxime as this might be more in your area, can you add a comment, and re-assign it to the correct team?

Comment 3 Flavio Leitner 2024-03-12 11:50:02 UTC

Migrated to  https://issues.redhat.com/browse/FDP-470