{"id":24,"date":"2021-04-20T12:32:51","date_gmt":"2021-04-20T11:32:51","guid":{"rendered":"https:\/\/www.simplyhosting.com\/support\/?post_type=ht_kb&p=24"},"modified":"2022-02-16T10:31:17","modified_gmt":"2022-02-16T10:31:17","slug":"vlan-interfaces-on-redhat","status":"publish","type":"ht_kb","link":"https:\/\/www.simplyhosting.com\/support\/articles\/vlan-interfaces-on-redhat\/","title":{"rendered":"VLAN Interfaces on Redhat"},"content":{"rendered":"\n

This step by step guide is for configuring VLAN interfaces on Redhat based operating systems.

For the following guide we will use the following data:<\/p>\n\n\n\n

Type<\/th>Value<\/th><\/tr>
VLAN Tag<\/td>1000<\/td><\/tr>
IP Address<\/td>192.0.2.1<\/td><\/tr>
Netmask<\/td>255.255.255.0<\/td><\/tr>
Device<\/td>em1<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Step-by-step guide<\/h2>\n\n\n\n

How to do it:<\/p>\n\n\n\n

  1. Determine whether the 802.1q VLAN module is loaded:<\/li><\/ol>\n\n\n\n
    lsmod | grep 8021q<\/pre>\n\n\n\n
    1. If it is loaded, go straight to step 3, otherwise:<\/li><\/ol>\n\n\n\n
      modprobe 8021q<\/pre>\n\n\n\n
      1. With the 802.1q module loaded into the kernel we need to determine what the interfaces are called:<\/li><\/ol>\n\n\n\n
        ls \/sys\/class\/net\/<\/pre>\n\n\n\n
        1. Create a VLAN interface based on the primary interface (usually the lowest numbered ethernet interface – eth0, em1, eno0, bce0 etc.) by opening a new file in your favourite editor<\/li><\/ol>\n\n\n\n
          Info:<\/strong> This guide is intended for single interface configurations only, VLAN interfaces on bonded interfaces follow a similar configuration, however the primary interface at this point will be called something like “bond0” as referenced in the bonding guide.<\/p><\/div>\n\n\n\n
          nano \/etc\/sysconfig\/network-scripts\/ifcfg-em1.1000<\/pre>\n\n\n\n
          1. In this new file, we create the configuration for the VLAN – please replace the data here with the correct interface name, VLAN tag and your preferred IP addressing schema (This should be RFC1918 private address space to avoid issues).<\/li><\/ol>\n\n\n\n
            DEVICE=em1.1000 \nBOOTPROTO=none \nONBOOT=yes \nVLAN=yes \nIPADDR=192.0.2.1 \nNETMASK=255.255.255.0 \nNM_CONTROLLED=no<\/pre>\n\n\n\n
            1. Bring up the VLAN interface by either restarting the networking stack or issuing the up command manually<\/li><\/ol>\n\n\n\n
              RHEL\/CentOS 5: \"service network restart\" OR \"ifconfig up em1.1000\" \nRHEL\/CentOS 6: \"service network restart\" OR \"ip link set em1.1000 up\" \nRHEL\/CentOS 7: \"systemctl restart network\" OR \"ip link set em1.1000 up\" <\/pre>\n\n\n\n
              1. The device should now be up and visible under the “ifconfig” or “ip address show” commands. You may test it by issuing a ping command to another machine that is already configured<\/li><\/ol>\n\n\n\n
                Get in touch<\/strong><\/h2>\n\n\n\n
                If you need advice on VLAN Interfaces for Redhat, we\u2019re here to help.<\/p>\n\n\n\n
                Call us on 0333 247 0222: <\/strong>Monday – Friday, 9am \u2013 5.30pm.<\/p>\n\n\n\n
                Chat with<\/strong> us on LiveChat:<\/strong> Monday – Friday, 9am – 5.30pm.<\/p>\n\n\n\n
                Write to us:<\/strong> Send us a support ticket from your Simply portal<\/a> and we\u2019ll get back to you as soon as we can. <\/p>\n\n\n\n
                If you don\u2019t have an account with Simply Hosting yet, you can also send our Sales team<\/a> an enquiry and we’ll get back to you between 9am<\/strong> and 5.30pm<\/strong>, Monday<\/strong> to Friday<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"
                This step by step guide is for configuring VLAN interfaces on Redhat based operating systems. For the following guide we will use the following data: Type Value VLAN Tag 1000 IP Address 192.0.2.1 Netmask 255.255.255.0 Device em1 Step-by-step guide How to do it: Determine whether the 802.1q VLAN module is loaded: lsmod | grep 8021q […]<\/p>\n","protected":false},"author":2,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"footnotes":""},"ht-kb-category":[13,24],"ht-kb-tag":[35,33],"class_list":["post-24","ht_kb","type-ht_kb","status-publish","format-standard","hentry","ht_kb_category-infrastructure","ht_kb_category-control-panel-os","ht_kb_tag-redhat","ht_kb_tag-vlan"],"yoast_head":"\nVLAN Interfaces on Redhat - Support Centre - Simply Hosting & Servers<\/title>\n<meta name=\"description\" content=\"This step by step guide is for configuring VLAN interfaces on Redhat based operating systems.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.simplyhosting.com\/support\/articles\/vlan-interfaces-on-redhat\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"VLAN Interfaces on Redhat - 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