{"id":117,"date":"2018-01-07T15:00:19","date_gmt":"2018-01-07T15:00:19","guid":{"rendered":"https:\/\/www.kuncar.net\/blog\/?p=117"},"modified":"2018-01-07T16:04:41","modified_gmt":"2018-01-07T16:04:41","slug":"using-vconfig-to-set-vlan-tagged-interface-with-802-1p-cos-priority-bits-set","status":"publish","type":"post","link":"https:\/\/www.kuncar.net\/blog\/2018\/using-vconfig-to-set-vlan-tagged-interface-with-802-1p-cos-priority-bits-set\/","title":{"rendered":"Using vconfig to set vlan tagged interface with 802.1p CoS priority bits set"},"content":{"rendered":"

\"\"This is just quick how-to on setting up vlan interface on a Linux system. As this is in lengths described elsewhere I will stick just to the commands and brief explanations.<\/span><\/p>\n

The first thing to do is to get the \u201cvlan\u201d package as it is not normally installed. The other bit is the 8021q kernel module which is not normally loaded but is present on Debian-based systems by defualt.<\/span><\/p>\n

Checking the state of the module:<\/span><\/p>\n

lsmod | grep 8021q<\/span><\/em><\/pre>\n
if this will return empty result you must load the module using mordprobe<\/span><\/p>\n
modprobe 8021q<\/span><\/em><\/pre>\n
and verify again with lsmod as before.<\/span><\/p>\n
Now the system is ready to get new tagged interfaces<\/span><\/p>\n
vconfig add eth0 X<\/span><\/em><\/pre>\n
Where eth0 is your physical interface and X is the VLAN ID you want the new interface to be tagged with. The command will have an output saying that interface eth0.X has been created. This is great but you also must now somehow specify what pbit setting do you want in there as by default egress traffic is by default priority 0. In order to make lets say ping ICMP packets marked with CoS we must create an egress map for the default priority (o) in which we will re-map it to whatever we want.<\/span><\/p>\n
vconfig set_egress_map eth0.X 0 7<\/span><\/em><\/pre>\n
In this example I have re-mapped the default priority 0 to egress priority 7<\/span><\/p>\n
This setup can be made permanent by adding the module name in \/etc\/modules and adding the relevant lines in the interfaces file e.g.:<\/span><\/p>\n
auto eth0.100<\/span>\r\niface eth0.100 inet static<\/span>\r\naddress 192.168.100.1<\/span>\r\nnetmask 255.255.255.0<\/span>\r\nvlan-raw-device eth0<\/span><\/em><\/pre>\n","protected":false},"excerpt":{"rendered":"
This is just quick how-to on setting up vlan interface on a Linux system. As this is in lengths described elsewhere I will stick just to the commands and brief explanations. The first thing to do is to get the \u201cvlan\u201d package as it is not normally installed. The other bit is the 8021q kernel … <\/p>\n
Continue reading “Using vconfig to set vlan tagged interface with 802.1p CoS priority bits set”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,13],"tags":[],"class_list":["post-117","post","type-post","status-publish","format-standard","hentry","category-linux","category-recovered"],"_links":{"self":[{"href":"https:\/\/www.kuncar.net\/blog\/wp-json\/wp\/v2\/posts\/117","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.kuncar.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.kuncar.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.kuncar.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.kuncar.net\/blog\/wp-json\/wp\/v2\/comments?post=117"}],"version-history":[{"count":7,"href":"https:\/\/www.kuncar.net\/blog\/wp-json\/wp\/v2\/posts\/117\/revisions"}],"predecessor-version":[{"id":126,"href":"https:\/\/www.kuncar.net\/blog\/wp-json\/wp\/v2\/posts\/117\/revisions\/126"}],"wp:attachment":[{"href":"https:\/\/www.kuncar.net\/blog\/wp-json\/wp\/v2\/media?parent=117"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.kuncar.net\/blog\/wp-json\/wp\/v2\/categories?post=117"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kuncar.net\/blog\/wp-json\/wp\/v2\/tags?post=117"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}