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2/28/2015

RHEL7: Configure lab network settings. ­ CertDepot

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RHEL7: Configure lab network settings. Last updated on December 2, 2014 (1,681 views) — 1 Comment ↓

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In the default KVM configuration, all connections to the VM go through the KVM host via a NAT mechanism. With this setting, a VM can access outside but not the opposite

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which is a very limited configuration. It’s better to set up a bridged configuration. Furthermore, this configuration doesn’t require any additional network card. Before going any further, you can decide to restore the old naming convention for your network interface card (for example eth0 instead of enp2s0).

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Install the bridge­utils package (if not already there): # yum install ‐y bridge‐utils

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Stop the NetworkManager service: # systemctl disable NetworkManager http://www.certdepot.net/rhel7­configure­lab­network­settings/

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2/28/2015

RHEL7: Configure lab network settings. ­ CertDepot

# systemctl stop NetworkManager 

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3 Start the network service:

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# systemctl start network # chkconfig network on Create a bridge called br0 (here the physical interface is eth0):

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# virsh iface‐bridge eth0 br0 Alternatively, you can manually create the bridge as follows:

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15 Rename the ifcfg­eth0 configuration file in ifcfg­br0:

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# cd /etc/sysconfig/network‐scripts # mv ifcfg‐eth0 ifcfg‐br0 Edit the /etc/ifcfg­br0 file:

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DEVICE=br0 ONBOOT=yes TYPE=Bridge BOOTPROTO=none IPADDR=192.168.1.5 NETMASK=255.255.255.0 GATEWAY=192.168.1.1 IPV6INIT=yes IPV6_AUTOCONF=yes DHCPV6=no STP=on DELAY=0 DNS1=192.168.1.1 DOMAIN=example.com Create the new ifcfg­eth0 file: DEVICE=eth0 ONBOOT=yes http://www.certdepot.net/rhel7­configure­lab­network­settings/

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2/28/2015

RHEL7: Configure lab network settings. ­ CertDepot

BRIDGE=br0 HWADDR="XX:XX:XX:XX:XX:XX" Now, you need to reboot to get your bridge working. You can find additional information on the Libvirt website. One comment on “RHEL7: Configure lab network settings.”

boyko says: September 30, 2014 at 7:57 pm

“team”.

RHCE6: Task of the day Allowed time: 5 minutes.  Set up time synchronization with default configuration.

Hello CertDepot, First I want to say that this is the most helpful site I ever seen regarding RHEL certifications and I am grateful that it exists ! I want to share my experience with this topic. During my attempts to setup a lab I had issues setting up the networking for the KVM host. Maybe because I installed the system with GUI (“Server with GUI” option from the installer) I had to disable the NetworkManager service and work with the network service which did the magic for me. Find below

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how I did the setup:

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# systemctl stop NetworkManager.service

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# systemctl disable NetworkManager.service

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and the setup for the network interfaces: [root@hvhost ~]# cat /etc/sysconfig/network­scripts/ifcfg­br0 DEVICE=”br0″ BOOTPROTO=”static” IPADDR=192.168.1.50 NETMASK=255.255.255.0 GATEWAY=192.168.1.1 DNS1=192.168.1.1 IPV6INIT=”yes” IPV6_AUTOCONF=”yes” ONBOOT=”yes” TYPE=”Bridge” http://www.certdepot.net/rhel7­configure­lab­network­settings/

Recently Updated Pages RHEL7 Free available resources RHEL7: Use yum transaction history. RHEL7: Install 3/7

2/28/2015

RHEL7: Configure lab network settings. ­ CertDepot

DELAY=”0″

Red Hat

[root@hvhost ~]#

Enterprise Linux systems as

[root@hvhost ~]# cat /etc/sysconfig/network­scripts/ifcfg­ eth0 TYPE=Ethernet NAME=eth0 UUID=xxxxxx­e062­4e99­xxxx­39ca3e89c54d ONBOOT=yes HWADDR=XX:XX:XX:XX:XX:XX BRIDGE=br0 [root@hvhost ~]# Log in to Reply

virtual guests. RHEL7 RHCSA Exam objectives RHEL7: Update the kernel package appropriately to ensure a bootable system. RHEL7: Locate, read, and use system documentation

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including man, info, and files in /usr/share/doc. RHEL7: How to deal with HTTPD SELinux policy. SELINUX: Use boolean settings to modify system SELinux settings. SELINUX: Diagnose and address routine SELinux policy violations. RHEL7: How to install a Nginx & PHP service.

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