Bug 1169139

Summary: Incorrect LAN interface speed (Saying 10G instead of 1G)
Product: [Retired] oVirt Reporter: Mohyedeen Nazzal <Mohyedeen.Nazzal>
Component: ovirt-engine-coreAssignee: bugs <bugs>
Status: CLOSED NOTABUG QA Contact: Pavel Stehlik <pstehlik>
Severity: low Docs Contact:
Priority: unspecified    
Version: unspecifiedCC: danken, dfediuck, ecohen, fdeutsch, gklein, iheim, lsurette, lvernia, Mohyedeen.Nazzal, rbalakri, yeylon
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard: network
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2014-12-01 20:14:07 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:
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Description Flags
vdsClient -s 0 getAllVmStats
none
LAN Interface Speed none

Description Mohyedeen Nazzal 2014-11-30 17:07:28 UTC 
Description of problem:


Version-Release number of selected component (if applicable):checked and 3.3,3.4, and 3.5


How reproducible:Always


Steps to Reproduce:
1.Install Ovirt, on a host with 1G interface
2.Create new Windows VM.
3.Check the interface speed, will be 10G

Actual results:A guest Nic with 10G speed.


Expected results:A guest Nic with 1G speed.


Additional info:
Comment 1 Mohyedeen Nazzal 2014-11-30 17:13:31 UTC 
The Guest Nic is supposed to be the same as the Host Nic "Same speed", the acctual results are different. When creating a new virtual machine and deploy it on a host with 1GB Nic. Attach that interface to the GuestVM, the Nic speed will become 10GB ....
Comment 2 Dan Kenigsberg 2014-12-01 01:17:54 UTC 
Could you share the output of

 vdsClient -s 0 getAllVmStats

?
Comment 3 Mohyedeen Nazzal 2014-12-01 07:50:05 UTC 
Created attachment 963173 [details]
vdsClient -s 0 getAllVmStats

VM Stats.
Comment 4 Dan Kenigsberg 2014-12-01 10:22:43 UTC 
For the record: nic "speed", and even more so vnic "speed", is a fake number that should not be taken too seriously. Actual traffic limit can be much more or much less than the stated speed.

Regarding the vdsm output: it is clear that vdsm reports all vnic with

 'speed': '1000'

so maybe Engine can tell why turned into 10G.
Comment 5 Dan Kenigsberg 2014-12-01 20:14:07 UTC 
Lior tells me that the 10G is what the Windows (or some monitoring tool) reports within the guest.

This is a reasonable fake number, since the vNIC is of virtio type, and it is capable of such speeds (inside the host). Communication out of the host are limited by the bottle neck on the way to a destination. This can be the host vNIC, or a loaded switch on the way.

In my opinion it is not a bug. It's just a fact of life that NIC "speeds" should not be taken too seriously.
Comment 6 Lior Vernia 2014-12-02 08:05:50 UTC 
Created attachment 963579 [details]
LAN Interface Speed

Just noticed that the screenshot wasn't attached here but to the mail on users, so attaching for future reference...