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SOLVING NETWORK MANAGER AND UDEV ISSUES WITH RHEL 6.4
Problem
When using the Mellanox ConnectX
®
-3 driver, mlx4_en, in RHEL, the Network Manager and udev
tools will incorrectly reset and set up the network devices. This results in the network devices being
renamed or incorrectly shut down, and possibly incapable of receiving frames.
Solution
Network Manager must be disabled, and one of the udev rules must be modified, as explained
below.
1. Follow the steps in this Red Hat link to stop the Network Manager service:
https://access.redhat.com/site/documentation/en-
US/Red_Hat_Enterprise_Linux_OpenStack_Platform/3/html/Installation_and_Configuration_G
uide/Disabling_Network_Manager.html)
2. Ensure that the Network Manager service is stopped by using the service command:
service NetworkManager stop
4. Ensure that the Network Manager service is disabled at startup by using the chkconfig
command:
chkconfig NetworkManager off
5. Open each interface configuration file on the system in a text editor. Interface configuration
files are found in the
/etc/sysconfig/network-scripts/ directory. They have names
of the form “
ifcfg-X”, where X is replaced by the name of the interface. Valid interface
names include
eth0, p1p5, and em1.
6. In each configuration file, ensure that the
NM_CONTROLLED configuration key is set to no
and the
ON_BOOT configuration key is set to yes.
NM_CONTROLLED=no
ONBOOT=yes
5. Ensure that the network service is started by using the service command:
service network start
6. Ensure that the network service is enabled at startup by using the chkconfig command:
chkconfig network on
7. To prevent udev from creating duplicate eth-X entries in /etc/udev/rules.d/70-
persistent-net.rules
, modify the following udev rule:
63
- ™ Appliance 2.4.1 1
- Configuration Guide 1
- Copyright Notice 2
- CONTENTS 3
- Part One: Introduction 7
- Overview 8
- INTEROPERABILITY 9
- 3 10
- First Boot Setup 12
- LICENSE AGREEMENT 14
- 14 21
- 16 23
- SETTING THE DATE AND TIME 25
- ENABLING THE HA CLUSTER 26
- SETTING UP PASSWORDS 27
- COMPLETING FIRST BOOT 28
- Logging In via the GUI 29
- Application-Based Mirroring 35
- ISCSI CONNECTIONS FOR HA 36
- Multipathing Overview 38
- ABOUT MULTIPATHING 39
- Discovering Multipaths 48
- Standalone Mode 49
- SETTING UP ISCSI IN WINDOWS 50
- 47 54
- INSTALLING MPIO ON LINUX 55
- Restarting Multipathing 57
- LINUX ISCSI INITIATOR NOTES 58
- HA Mode 59
- 54 61
- 56 63
- Initiators 64
- 59 66
- 60 67
- Troubleshooting Linux Issues 68
- Solution 69
- Problem 70
- 66 73
- ASM BEST PRACTICES 75
- EXPORTING LUNS TO INITIATORS 76
- ASM STORAGE CONFIGURATIONS 77
- OTHER BEST PRACTICES 80
- Cluster (WSFC) 81
- AUTO-FAILBACK SETTINGS 82
- Windows Clustering Hot Fixes 84
- 78 85
- Appendixes 86
- REAR PANEL 87
- Low-Profile Slot Assignments 88
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