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This article is about how to add a custom network card and change the interface of the network card in RHEL7. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Environment

VMware Workstation Pro Red Hat Enterprise Linux Server release 7.3

View current network card information [root@Jaking ~] # cat / etc/redhat-releaseRed Hat Enterprise Linux Server release 7.3 (Maipo) [root@Jaking ~] # ifconfigens33: flags=4163 mtu 1500 inet 192.168.10.11 netmask 255.255.255.0 broadcast 192.168.10.255 inet6 fe80::250:56ff:fe2b:88bf prefixlen 64 scopeid 0x20 ether 00:50:56:2b:88:bf txqueuelen 1000 (Ethernet) RX packets 454bytes 44638 ( 43.5 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 339 bytes 33150 (32.3 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0lo: flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6:: 1 prefixlen 128 scopeid 0x10 loop txqueuelen 1 (Local Loopback) RX packets 112 bytes 9492 (9.2 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX Packets bytes 9492 (9.2 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 add network card to cancel the hook in the red box to view the network card information [root@Jaking ~] # ifconfigens33: flags=4163 mtu 1500 inet 192.168.10.11 netmask 255.255.255.0 broadcast 192.168.10.255 inet6 fe80::250:56ff:fe2b:88bf prefixlen 64 scopeid 0x20 ether 00:50:56:2b:88:bf txqueuelen 1000 (Ethernet) RX packets 488 bytes 47935 (46.8 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 356 bytes 35698 (34.8 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0ens38: flags=4163 mtu 1500 ether 00:0c:29:46:f9:b8 txqueuelen 1000 (Ethernet) RX packets 5 bytes 594 (594.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 0 bytes 0 (0.0B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0lo: flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6:: 1 prefixlen 128 scopeid 0x10 loop txqueuelen 1 (Local Loopback) RX packets 112 bytes 9492 (9.2 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 112 bytes 9492 (9.2 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 configure the network card and change the network card Interface [root@Jaking ~] # cd / etc/sysconfig/network-scripts/ [root@Jaking network-scripts] # lsifcfg-ens33 ifdown-ipv6 ifdown-TeamPort ifup-ippp ifup-routes network-functionsifcfg-lo ifdown-isdn ifdown-tunnel ifup-ipv6 ifup-sit network-functions-ipv6ifdown ifdown-post ifup ifup-isdn ifup-Teamifdown-bnep ifdown-ppp ifup-aliases ifup-plip ifup-TeamPortifdown- After the network card is added to eth ifdown-routes ifup-bnep ifup-plusb ifup-tunnelifdown-ib ifdown-sit ifup-eth ifup-post ifup-wirelessifdown-ippp ifdown-Team ifup-ib ifup-ppp init.ipv6-global Need to create a corresponding network card configuration file [root@Jaking network-scripts] # cp ifcfg-ens33 ifcfg-ens34 [root@Jaking network-scripts] # vim ifcfg-ens34 TYPE=EthernetBOOTPROTO=staticDEFROUTE=yesPEERDNS=yesPEERROUTES=yesIPV4_FAILURE_FATAL=noNAME=ens34DEVICE=ens34ONBOOT=yesIPADDR=172.16.100.100NETMASK=255.255.255.0 disable ens38 interface [root@Jaking network-scripts] # ip link set ens38 down [root@Jaking network-scripts] # ifconfigens33: flags=4163 mtu 1500 inet 192.168.10.11 netmask 255.255.255.0 broadcast 192.168 .10.255 inet6 fe80::250:56ff:fe2b:88bf prefixlen 64 scopeid 0x20 ether 00:50:56:2b:88:bf txqueuelen 1000 (Ethernet) RX packets 812 bytes 74791 (73.0 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 537 bytes 61780 (60.3 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0lo: flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 Inet6:: 1 prefixlen 128scopeid 0x10 loop txqueuelen 1 (Local Loopback) RX packets 1122bytes 9492 (9.2KiB) RX errors 0 dropped 0 overruns 0 frame 0TX packets 112bytes 9492 (9.2KiB) TX errors 0dropped 0overruns 0carrier 0collisions 0 rename ens38 interface to ens34 [root@Jaking network-scripts] # ip link set ens38 name ens34 enable modified ens34 interface [root@Jaking network-scripts] # ip link Set ens34 up [root@Jaking network-scripts] # systemctl restart network [root@Jaking network-scripts] # ifconfig ens33: flags=4163 mtu 1500 inet 192.168.10.11 netmask 255.255.255.0 broadcast 192.168.10.255 inet6 fe80::250:56ff:fe2b:88bf prefixlen 64 scopeid 0x20 ether 00:50:56:2b:88:bf txqueuelen 1000 (Ethernet) RX packets 1389 bytes 123239 (120.3 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 913 bytes 117924 (115.1 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0ens34: flags=4163 mtu 1500 inet 172.16.100.100 netmask 255.255.255.0 broadcast 192.168.100.255 ether 00:0c:29:46:f9:b8 txqueuelen 1000 (Ethernet) RX packets 5 bytes 594 (594.0 B) RX errors 0 dropped 0 overruns 0 frame 0 TX packets 2 bytes 120 (120.0 B) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0lo: flags=73 mtu 65536 inet 127.0.0.1 netmask 255.0.0.0 inet6:: 1 prefixlen 128 scopeid 0x10 loop txqueuelen 1 (Local Loopback) RX packets 148bytes 12552 (12.2 KiB) RX errors 0 dropped 0 overruns 0 frame 0 TX packets bytes 12552 (12.2 KiB) TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

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