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Bug 821598

Summary:

boot guest with 232 e1000 nics, guest shows "Invalid MAC Address"

Product:

Red Hat Enterprise Linux 6

Reporter:

FuXiangChun <xfu>

Component:

qemu-kvm

Assignee:

Michael S. Tsirkin <mst>

Status:

CLOSED NOTABUG

QA Contact:

Virtualization Bugs <virt-bugs>

Severity:

medium

Docs Contact:

Priority:

unspecified

Version:

6.3

CC:

acathrow, akong, areis, bsarathy, chayang, dyasny, flang, juzhang, michen, mkenneth, qzhang, shu, sluo, virt-maint

Target Milestone:

Target Release:

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Hardware:

x86_64

OS:

Linux

Whiteboard:

scalability

Fixed In Version:

Doc Type:

Bug Fix

Doc Text:

Story Points:

---

Clone Of:

Environment:

Last Closed:

2012-05-20 11:52:15 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:

Attachments:

Description	Flags
boot guest with 232 e1000 nics command line	none

Description FuXiangChun 2012-05-15 05:41:36 UTC

Description of problem:
boot guest with multifunction=on option and more than 160 e1000 nics. guest show below error message during booting.
e1000 0000:00:19.0: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.1: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.2: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.3: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.4: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.5: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.6: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.7: (unregistered net_device): Invalid MAC Address
....................

Version-Release number of selected component (if applicable):
#rpm -qa|grep qemu
qemu-kvm-0.12.1.2-2.292.el6.x86_64
# uname -r
2.6.32-270.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1.boot with 232 e1000 nics
cli is in attachment
2.
3.
  
Actual results:
e1000 0000:00:16.1: (unregistered net_device): Invalid MAC Address
e1000 0000:00:16.2: (unregistered net_device): Invalid MAC Address
e1000 0000:00:16.3: (unregistered net_device): Invalid MAC Address
e1000 0000:00:16.4: (unregistered net_device): Invalid MAC Address
e1000 0000:00:16.5: (unregistered net_device): Invalid MAC Address
e1000 0000:00:16.6: (unregistered net_device): Invalid MAC Address
e1000 0000:00:16.7: (unregistered net_device): Invalid MAC Address
e1000 0000:00:17.0: (unregistered net_device): Invalid MAC Address
e1000 0000:00:17.1: (unregistered net_device): Invalid MAC Address
e1000 0000:00:17.2: (unregistered net_device): Invalid MAC Address
e1000 0000:00:17.3: (unregistered net_device): Invalid MAC Address
e1000 0000:00:17.4: (unregistered net_device): Invalid MAC Address
e1000 0000:00:17.5: (unregistered net_device): Invalid MAC Address
e1000 0000:00:17.6: (unregistered net_device): Invalid MAC Address
e1000 0000:00:17.7: (unregistered net_device): Invalid MAC Address
e1000 0000:00:18.0: (unregistered net_device): Invalid MAC Address
e1000 0000:00:18.1: (unregistered net_device): Invalid MAC Address
e1000 0000:00:18.2: (unregistered net_device): Invalid MAC Address
e1000 0000:00:18.3: (unregistered net_device): Invalid MAC Address
e1000 0000:00:18.4: (unregistered net_device): Invalid MAC Address
e1000 0000:00:18.5: (unregistered net_device): Invalid MAC Address
e1000 0000:00:18.6: (unregistered net_device): Invalid MAC Address
e1000 0000:00:18.7: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.0: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.1: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.2: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.3: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.4: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.5: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.6: (unregistered net_device): Invalid MAC Address
e1000 0000:00:19.7: (unregistered net_device): Invalid MAC Address
e1000 0000:00:1a.0: (unregistered net_device): Invalid MAC Address
e1000 0000:00:1a.1: (unregistered net_device): Invalid MAC Address
e1000 0000:00:1a.2: (unregistered net_device): Invalid MAC Address
e1000 0000:00:1a.3: (unregistered net_device): Invalid MAC Address
e1000 0000:00:1a.4: (unregistered net_device): Invalid MAC Address
e1000 0000:00:1a.5: (unregistered net_device): Invalid MAC Address
e1000 0000:00:1a.6: (unregistered net_device): Invalid MAC Address
e1000 0000:00:1a.7: (unregistered net_device): Invalid MAC Address
e1000 0000:00:1b.0: (unregistered net_device): Invalid MAC Address
e1000 0000:00:1b.1: (unregistered net_device): Invalid MAC Address
e1000 0000:00:1b.2: (unregistered net_device): Invalid MAC Address
e1000 0000:00:1b.3: (unregistered net_device): Invalid MAC Address
e1000 0000:00:1b.4: (unregistered net_device): Invalid MAC Address

Expected results:
guest work well

Additional info:
rtl8139 and virtio nic haven't this issue, if boot guest without multifunction then guest only support 29 e1000 nic, guest work well.

Comment 1 FuXiangChun 2012-05-15 05:43:11 UTC

Created attachment 584541 [details]
boot guest with 232 e1000 nics command line

Comment 2 Amos Kong 2012-05-20 11:52:15 UTC

I found three kinds of mac prefix in your attachment.
 00:...
 01:45:59: ...
 29:45:59: ...

The last two prefixes are multicast MAC address, they could not be used for ethernet.

http://en.wikipedia.org/wiki/MAC_address
MAC have 6 parts, if the first bit of part 1 is 1, it's a multicast MAC address.

0x00 & 1 = 0 (available)
0x01 & 1 = 1 (multicast mac)
0x29 & 1 = 1 (multicast mac)