{"id":6333,"date":"2016-10-12T13:20:48","date_gmt":"2016-10-12T05:20:48","guid":{"rendered":"http:\/\/rmohan.com\/?p=6333"},"modified":"2016-10-12T13:20:48","modified_gmt":"2016-10-12T05:20:48","slug":"centos-7-0-configure-networking","status":"publish","type":"post","link":"https:\/\/mohan.sg\/?p=6333","title":{"rendered":"[CentOS 7.0] Configure Networking"},"content":{"rendered":"

[CentOS 7.0] Configure Networking<\/h3>\n
<\/div>\n
[1] Set static IP address to the server. ( Replace the section ‘ifcfg-***’ to your own interface name )<\/p>\n

# install the package below which includes ifconfig, netstat and so on first<\/p>\n

[root@dlp ~]#yum -y install net-tools<\/p>\n

[root@dlp ~]#vi \/etc\/sysconfig\/network-scripts\/ifcfg-eno16777736<\/p>\n

HWADDR=”00:0C:29:CD:9C:2D”
\nTYPE=”Ethernet”<\/p>\n

# change
\nBOOTPROTO=”none”
\nDEFROUTE=”yes”
\nPEERDNS=”yes”
\nPEERROUTES=”yes”
\nIPV4_FAILURE_FATAL=”no”
\nIPV6INIT=”yes”
\nIPV6_AUTOCONF=”yes”
\nIPV6_DEFROUTE=”yes”
\nIPV6_PEERDNS=”yes”
\nIPV6_PEERROUTES=”yes”
\nIPV6_FAILURE_FATAL=”no”
\nNAME=”eno16777736″
\nUUID=”3eb052b5-f8f2-4609-b70b-e44a050f6524″
\nONBOOT=”yes”
\n# add like follows
\n# this server’s IP address
\nIPADDR=”10.0.0.30″<\/p>\n

# subnet mask
\nNETMASK=”255.255.255.0″<\/p>\n

# default gateway
\nGATEWAY=”10.0.0.1″<\/p>\n

# DNS server’s IP address
\nDNS1=”10.0.0.1″<\/p>\n

[root@dlp ~]#systemctl stop NetworkManager<\/p>\n

[root@dlp ~]#systemctl disable NetworkManager<\/p>\n

rm ‘\/etc\/systemd\/system\/multi-user.target.wants\/NetworkManager.service’
\nrm ‘\/etc\/systemd\/system\/dbus-org.freedesktop.NetworkManager.service’
\nrm ‘\/etc\/systemd\/system\/dbus-org.freedesktop.nm-dispatcher.service’<\/p>\n

[root@dlp ~]#systemctl restart network<\/p>\n

[root@dlp ~]#chkconfig network on<\/p>\n

[root@dlp ~]#ifconfig<\/p>\n

eno16777736: flags=4163\u00a0 mtu 1500
\ninet 10.0.0.30\u00a0 netmask 255.255.255.0\u00a0 broadcast 10.0.0.255
\ninet6 fe80::20c:29ff:fecd:9c2d\u00a0 prefixlen 64\u00a0 scopeid 0x20
\nether 00:0c:29:cd:9c:2d\u00a0 txqueuelen 1000\u00a0 (Ethernet)
\nRX packets 5978\u00a0 bytes 7634267 (7.2 MiB)
\nRX errors 0\u00a0 dropped 0\u00a0 overruns 0\u00a0 frame 0
\nTX packets 3256\u00a0 bytes 287222 (280.4 KiB)
\nTX errors 0\u00a0 dropped 0 overruns 0\u00a0 carrier 0\u00a0 collisions 0<\/p>\n

lo: flags=73\u00a0 mtu 65536
\ninet 127.0.0.1\u00a0 netmask 255.0.0.0
\ninet6 ::1\u00a0 prefixlen 128\u00a0 scopeid 0x10
\nloop\u00a0 txqueuelen 0\u00a0 (Local Loopback)
\nRX packets 0\u00a0 bytes 0 (0.0 B)
\nRX errors 0\u00a0 dropped 0\u00a0 overruns 0\u00a0 frame 0
\nTX packets 0\u00a0 bytes 0 (0.0 B)
\nTX errors 0\u00a0 dropped 0 overruns 0\u00a0 carrier 0\u00a0 collisions 0<\/p>\n

[2] Disable IPv6 if you do not need it.<\/p>\n

[root@dlp ~]#vi \/etc\/default\/grub<\/p>\n

# line 6: add
\nGRUB_CMDLINE_LINUX=”ipv6.disable=1 rd.lvm.lv=fedora\/swap rd.md=0…..<\/p>\n

# reload
\n[root@dlp ~]#grub2-mkconfig -o \/boot\/grub2\/grub.cfg<\/p>\n

[root@dlp ~]#reboot<\/p>\n

[3] if you’d like to use the network interface name as ethX, configure like follows.<\/p>\n

[root@dlp ~]#vi \/etc\/default\/grub<\/p>\n

# line 6: add
\nGRUB_CMDLINE_LINUX=”net.ifnames=0 rd.lvm.lv=fedora\/swap rd.md=0…..<\/p>\n

# reload
\n[root@dlp ~]#grub2-mkconfig -o \/boot\/grub2\/grub.cfg<\/p>\n

[root@dlp ~]#reboot<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

[CentOS 7.0] Configure Networking [1] Set static IP address to the server. ( Replace the section ‘ifcfg-***’ to your own interface name )<\/p>\n

# install the package below which includes ifconfig, netstat and so on first<\/p>\n

[root@dlp ~]#yum -y install net-tools<\/p>\n

[root@dlp ~]#vi \/etc\/sysconfig\/network-scripts\/ifcfg-eno16777736<\/p>\n

HWADDR=”00:0C:29:CD:9C:2D” TYPE=”Ethernet”<\/p>\n

# change BOOTPROTO=”none” DEFROUTE=”yes” PEERDNS=”yes” PEERROUTES=”yes” IPV4_FAILURE_FATAL=”no” IPV6INIT=”yes” IPV6_AUTOCONF=”yes” […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[73],"tags":[],"_links":{"self":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/6333"}],"collection":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6333"}],"version-history":[{"count":1,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/6333\/revisions"}],"predecessor-version":[{"id":6334,"href":"https:\/\/mohan.sg\/index.php?rest_route=\/wp\/v2\/posts\/6333\/revisions\/6334"}],"wp:attachment":[{"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6333"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6333"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mohan.sg\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6333"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}