RHEL7 - Creating virtual interface

 Creating virtual interface

[root@sam network-scripts]# cd /etc/sysconfig/network-scripts

[root@sam network-scripts]# cp -p cfg-enp0s25 ifcfg-enp0s25:0

[root@sam network-scripts]# vi ifcfg-enp0s25:0
TYPE=Ethernet
BOOTPROTO=static
DEFROUTE=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=yes
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_FAILURE_FATAL=no
NAME=enp0s25:0
UUID=2a0b8f3c-e991-4a09-88a8-6fdefe273193
DEVICE=enp0s25:0
ONBOOT=yes
IPADDR=192.168.10.9
PREFIX=24
GATEWAY=192.168.10.1
DNS1=192.168.10.110
DOMAIN=expanor.local
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_PRIVACY=no
~
~
~

[root@sam network-scripts]# systemctl restart network

[root@sam network-scripts]# ifconfig -a
enp0s25: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.10.8  netmask 255.255.255.0  broadcast 192.168.10.255
        inet6 fe80::223:aeff:feb0:320c  prefixlen 64  scopeid 0x20<link>
        ether 00:23:ae:b0:32:0c  txqueuelen 1000  (Ethernet)
        RX packets 4428211  bytes 6120463158 (5.7 GiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 1943017  bytes 140766095 (134.2 MiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
        device interrupt 21  memory 0xf7ae0000-f7b00000

enp0s25:0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.10.9  netmask 255.255.255.0  broadcast 192.168.10.255
        ether 00:23:ae:b0:32:0c  txqueuelen 1000  (Ethernet)
        device interrupt 21  memory 0xf7ae0000-f7b00000

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 0  (Local Loopback)
        RX packets 9668  bytes 985822 (962.7 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 9668  bytes 985822 (962.7 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

[root@sam network-scripts]# ping  -c 3 192.168.10.9
PING 192.168.10.9 (192.168.10.9) 56(84) bytes of data.
64 bytes from 192.168.10.9: icmp_seq=1 ttl=64 time=0.077 ms
64 bytes from 192.168.10.9: icmp_seq=2 ttl=64 time=0.032 ms



[root@sam network-scripts]# ip addr show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: enp0s25: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:23:ae:b0:32:0c brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.8/24 brd 192.168.10.255 scope global enp0s25
       valid_lft forever preferred_lft forever
    inet 192.168.10.9/24 brd 192.168.10.255 scope global secondary enp0s25:0
       valid_lft forever preferred_lft forever
    inet6 fe80::223:aeff:feb0:320c/64 scope link
       valid_lft forever preferred_lft forever
[root@sam network-scripts]#


^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^


 1031  cd /etc/sysconfig/network-scripts/
 1032  pwd
 1033  ls
 1034  cp ifcfg-enp0s3 ifcfg-enp0s3:0
 1035  vi ifcfg-enp0s3:0
 1036  more ifcfg-enp0s3:0
 1037  systemctl restart network
 1038  ifconfig
 1039  ifcofig -a
 1040  ifconfig -a
 1041  vi ifcfg-enp0s3:0
 1042  ls
 1043  ifconfig ifcfg-enp0s3:0 plumb
 1044  ifconfig enp0s3:0 plumb
 1045  ifconfig -a
 1046  systemctl restart network
 1047  ifconfig -a
 1048  ip addr show
 1049  ls
 1050  more ifcfg-enp0s3:0
 1051  ifconfig enp0s3:0 plumb
 1052  ip addr show
 1053  ifconfig enp0s3:0 192.168.10.19 up
 1054  ifconfig -a
 1055  history
[root@sudhir network-scripts]#