{"id":3987,"date":"2015-08-10T11:55:59","date_gmt":"2015-08-10T16:55:59","guid":{"rendered":"http:\/\/icesquare.com\/wordpress\/?p=3987"},"modified":"2015-08-13T13:35:58","modified_gmt":"2015-08-13T18:35:58","slug":"centos-6-no-networking-connections-after-upgrade","status":"publish","type":"post","link":"https:\/\/icesquare.com\/wordpress\/centos-6-no-networking-connections-after-upgrade\/","title":{"rendered":"CentOS 6: No Networking Connections After Upgrade"},"content":{"rendered":"

Today I reboot my CentOS 6 server, and I realized that the network connection was lost after the upgrade. To be exact, it seems that the problem was caused by the new kernel: 2.6.32-573.1.1.el6.x86_64<\/strong>. It modified the network settings of the server with manual settings (server with DHCP is not affected). Here is how I fix the problem (You will need physical access to the server):<\/p>\n

I have noticed that the adapter profile has been modified to something that doesn’t make scenes. If you compare the network settings, you will notice the following differences:<\/p>\n

\r\n#Before the upgrade\r\n#cat \/etc\/sysconfig\/network-scripts\/ifcfg-em1  \r\nPREFIX=24\r\n<\/pre>\n
\r\n#After the upgrade\r\n#cat \/etc\/sysconfig\/network-scripts\/ifcfg-em1  \r\nPREFIX=32\r\n<\/pre>\n
So I simply make the modifications to the adapter settings and restart the network service, i.e.,<\/p>\n
\r\nsudo service network restart\r\n<\/pre>\n
And the network connection is back!<\/p>\n
That’s it! Hope this tutorial saves you from heart attack.<\/p>\n
–Derrick<\/p>\n
 <\/div>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
Today I reboot my CentOS 6 server, and I realized that the network connection was lost after the upgrade. To be exact, it seems that the problem was caused by Continue Reading →<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[94,146,144,6,69],"tags":[162],"class_list":["post-3987","post","type-post","status-publish","format-standard","hentry","category-computer-problems-computer-help-pc-support","category-everyday-computer-problem","category-sever-problem","category-technology","category-troubleshooting-technology","tag-centos"],"jetpack_publicize_connections":[],"jetpack_shortlink":"https:\/\/wp.me\/p1sqzr-12j","jetpack_sharing_enabled":true,"jetpack-related-posts":[{"id":4542,"url":"https:\/\/icesquare.com\/wordpress\/centos-7-dracut-initqueue-timeout\/","url_meta":{"origin":3987,"position":0},"title":"CentOS 7 – dracut-initqueue timeout","author":"Derrick","date":"January 2, 2019","format":false,"excerpt":"I received a Christmas gift from the RHEL 7 \/ CentOS 7 \/ Linux kernel team today. After my system got updated to the new kernel (3.10.0-957.1.3.el7.x86_64), my system gave me few surprises. As a sys-admin, I don't want to see any surprise. What I really want is a working\u2026","rel":"","context":"In "Computer Problems"","block_context":{"text":"Computer Problems","link":"https:\/\/icesquare.com\/wordpress\/category\/technology\/computer-problems-computer-help-pc-support\/"},"img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":3692,"url":"https:\/\/icesquare.com\/wordpress\/centos-7-epel-remi-location\/","url_meta":{"origin":3987,"position":1},"title":"CentOS 7 EPEL \/ REMI Location","author":"Derrick","date":"July 18, 2014","format":false,"excerpt":"CentOS 7 was released about a week ago, so I decided to give it a try. As you probably know, CentOS is a clone of Red Hat Enterprise Linux(RHEL). Typically, Red Hat put the new features in Fedora first. 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