{"id":5454,"date":"2016-10-17T10:38:31","date_gmt":"2016-10-17T10:38:31","guid":{"rendered":"https:\/\/cpanelplesk.com\/wp62\/?p=5454"},"modified":"2021-02-02T10:21:03","modified_gmt":"2021-02-02T10:21:03","slug":"create-network-bridge-centos-7-rhel-7","status":"publish","type":"post","link":"https:\/\/cpanelplesk.com\/wp62\/create-network-bridge-centos-7-rhel-7\/","title":{"rendered":"How to create a Network Bridge on CentOS 7 \/ RHEL 7"},"content":{"rendered":"<p><span style=\"color: #000000;\">Sometimes you may need to create network bridge adapter in Linux; specially during the settings of KVM (Kernel-based virtual Machine), and, also while setting up Linux system bins.<!--more--><\/span><\/p>\n<p><span style=\"color: #000000;\"> This bridge network allows virtual machines to have access to the external network and vice-versa, follow this guide to create network bridge on <a href=\"https:\/\/cpanelplesk.com\/wp62\/install-varnish-4-centos-7-step-step\/\">CentOS 7<\/a> \/ RHEL7.<\/span><\/p>\n<p><span style=\"color: #000000;\">A bridge interface is actually a virtual interface handled by a config file on your Linux system. Creating a bridge is quite simple, just follow those steps and you\u2019re all set!<\/span><\/p>\n<h2><span style=\"color: #000000;\">Install Module:<\/span><\/h2>\n<p><span style=\"color: #000000;\">CentOS 7 comes with bridging module loaded on system boot by default, verify it by using below command.<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre># modinfo bridge\r\nfilename: \/lib\/modules\/3.10.0-327.el7.x86_64\/kernel\/net\/bridge\/bridge.ko<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\">If the module is not loading, you can load it using the following command:<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre># modprobe --first-time bridge<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\">Install bridge-utils for controlling the network adapters.<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre># yum install bridge-utils -y<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<h2><span style=\"color: #000000;\">Create a Network Bridge:<\/span><\/h2>\n<p><span style=\"color: #000000;\">Now its time To create a network bridge, create a file called <strong>\u201cifcfg-virbrN\u201d<\/strong> replacing \u201cN\u201d with a number, such as \u201c0\u201d in the<strong> \u201c\/etc\/sysconfig\/network-scripts\/\u201c<\/strong>.<\/span><\/p>\n<p><span style=\"color: #000000;\">File doesn\u2019t needs\u00a0to be \u201cvirbrN\u201c, you can also give a name like \u201cbrN\u201d<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre># nano \/etc\/sysconfig\/network-scripts\/ifcfg-virbr0<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\">Place the following content into that file, modify it according to your environment.<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre>DEVICE=\"virbr0\"\r\nBOOTPROTO=\"static\"\r\nIPADDR=\"192.168.12.10\"\r\nNETMASK=\"255.255.255.0\"\r\nGATEWAY=\"192.168.12.2\"\r\nDNS1=192.168.12.2\r\nONBOOT=\"yes\"\r\nTYPE=\"Bridge\"\r\nNM_CONTROLLED=\"no\"<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p>Now, it\u2019s the time to modify the network configuration of the existing adapter in such a way that it points to a bridge interface.<\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre># nano \/etc\/sysconfig\/network-scripts\/ifcfg-eto16886627<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\">Place the content like below.<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre>DEVICE=eto16886627\r\nTYPE=Ethernet\r\nBOOTPROTO=none\r\nONBOOT=yes\r\nNM_CONTROLLED=no\r\nBRIDGE=virbr0<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\">Restart the network using the following command.<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre># systemctl restart network<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\">Use ifconfig command to see interface details.<\/span><\/p>\n<div class=\"space1\"><\/div>\n<div class=\"command-sh\">\n<pre># ifconfig<\/pre>\n<\/div>\n<div class=\"space1\"><\/div>\n<p><span style=\"color: #000000;\">That\u2019s all you have to do, Please Give your opinion below if you experience any issues or to discuss your ideas and experiences.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sometimes you may need to create network bridge adapter in Linux; specially during the settings of KVM (Kernel-based virtual Machine), and, also while setting up Linux system bins. [&#8230;]<\/p>\n<p><a class=\"understrap-read-more-link\" href=\"https:\/\/cpanelplesk.com\/wp62\/create-network-bridge-centos-7-rhel-7\/\">Continue Reading&#8230;<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-5454","post","type-post","status-publish","format-standard","hentry","category-cpanel"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to create a Network Bridge on CentOS 7 \/ RHEL 7 - cPanel Plesk<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/cpanelplesk.com\/wp62\/create-network-bridge-centos-7-rhel-7\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:title\" content=\"How to create a Network Bridge on CentOS 7 \/ RHEL 7 - cPanel Plesk\" \/>\n<meta name=\"twitter:description\" content=\"Sometimes you may need to create network bridge adapter in Linux; specially during the settings of KVM (Kernel-based virtual Machine), and, also while setting up Linux system bins. 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