Linux 8 修改网卡名称
惜分飞发表于 2024-09-03 06:30:56
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在某些情况下,我们希望通过修改网卡的名称,从而避免应用层面的一些配置(比如oracle rac 网络从千兆换成万兆,我们直接把万兆网卡的名称修改和之前使用的网卡名称一致,集群层面不用做任何配置),这里做一个测试,验证在linux 8（redhat/oracle linux/Rocky/AlmaLinux/centos等）修改网卡名称可行性:
查看当前主机网卡名称情况(有两个网卡ens160和ens192)
[root@xifenfeidg network-scripts]# cat /etc/redhat-release
Red Hat Enterprise Linux release 8.9 (Ootpa)
[root@xifenfeidg network-scripts]# cat /etc/oracle-release
Oracle Linux Server release 8.9
[root@xifenfeidg network-scripts]# ifconfig
ens160: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.118.141 netmask 255.255.255.0 broadcast 192.168.118.255
inet6 fe80::20c:29ff:fe2d:1c85 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:2d:1c:85 txqueuelen 1000 (Ethernet)
RX packets 265118 bytes 392933574 (374.7 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 24828 bytes 1374591 (1.3 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens192: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.222.18 netmask 255.255.255.0 broadcast 192.168.222.255
inet6 fe80::20c:29ff:fe2d:1c8f prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:2d:1c:8f txqueuelen 1000 (Ethernet)
RX packets 165 bytes 18748 (18.3 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 127 bytes 21755 (21.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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 1000 (Local Loopback)
RX packets 6403 bytes 648853 (633.6 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 6403 bytes 648853 (633.6 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 52:54:00:ab:b4:34 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@xifenfeidg ~]# nmcli d s
DEVICE TYPE STATE CONNECTION
ens160 ethernet connected ens160
ens192 ethernet connected ens192
virbr0 bridge unmanaged --
lo loopback unmanaged --
[root@xifenfeidg ~]# cd /etc/sysconfig/network-scripts/
[root@xifenfeidg network-scripts]# ls
ifcfg-ens160 ifcfg-ens192
尝试把ens160修改为ens191,删除ens160设备
[root@xifenfeidg network-scripts]# nmcli connection delete ens160
Connection 'ens160' (ae9669d8-3db3-424e-8a0e-41d8b05197d0) successfully deleted.
[root@xifenfeidg network-scripts]# ifconfig
ens160: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
ether 00:0c:29:2d:1c:85 txqueuelen 1000 (Ethernet)
RX packets 291009 bytes 431437623 (411.4 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 27085 bytes 1499570 (1.4 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens192: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.222.18 netmask 255.255.255.0 broadcast 192.168.222.255
inet6 fe80::20c:29ff:fe2d:1c8f prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:2d:1c:8f txqueuelen 1000 (Ethernet)
RX packets 193 bytes 21530 (21.0 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 156 bytes 27505 (26.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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 1000 (Local Loopback)
RX packets 6427 bytes 650593 (635.3 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 6427 bytes 650593 (635.3 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
virbr0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
ether 52:54:00:ab:b4:34 txqueuelen 1000 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
[root@xifenfeidg network-scripts]# nmcli d s
DEVICE TYPE STATE CONNECTION
ens192 ethernet connected ens192
ens160 ethernet disconnected --
virbr0 bridge unmanaged --
lo loopback unmanaged --
增加ens191设备(注意mac地址使用之前ens160)
[root@xifenfeidg network-scripts]# nmcli connection add type ethernet con-name ens191 ifname ens191 mac 00:0c:29:2d:1c:85 Connection 'ens191' (62a5fd83-8dc9-407d-83cc-1327d400fa0b) successfully added. [root@xifenfeidg network-scripts]# [root@xifenfeidg network-scripts]# nmcli d s DEVICE TYPE STATE CONNECTION ens192 ethernet connected ens192 ens160 ethernet disconnected -- virbr0 bridge unmanaged -- lo loopback unmanaged --
重启主机
[root@xifenfeidg network-scripts]# reboot Activate the web console with: systemctl enable --now cockpit.socket Last login: Tue Sep 3 14:12:20 2024 from 192.168.222.1
重启之后登录主机查看网络信息(确认网卡名称从ens160修改为ens191)
[root@xifenfeidg ~]# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
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: ens191: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 00:0c:29:2d:1c:85 brd ff:ff:ff:ff:ff:ff
altname enp3s0
inet 192.168.118.141/24 brd 192.168.118.255 scope global dynamic noprefixroute ens191
valid_lft 1788sec preferred_lft 1788sec
inet6 fe80::30e4:c5bf:692a:2753/64 scope link noprefixroute
valid_lft forever preferred_lft forever
3: ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
link/ether 00:0c:29:2d:1c:8f brd ff:ff:ff:ff:ff:ff
altname enp11s0
inet 192.168.222.18/24 brd 192.168.222.255 scope global noprefixroute ens192
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe2d:1c8f/64 scope link
valid_lft forever preferred_lft forever
4: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000
link/ether 52:54:00:ab:b4:34 brd ff:ff:ff:ff:ff:ff
inet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0
valid_lft forever preferred_lft forever
[root@xifenfeidg ~]# cd /etc/sysconfig/network-scripts/
[root@xifenfeidg network-scripts]# ls -ltr
total 8
-rw-r--r--. 1 root root 308 Jul 31 05:04 ifcfg-ens192
-rw-r--r--. 1 root root 300 Sep 3 14:16 ifcfg-ens191
[root@xifenfeidg network-scripts]# nmcli d s
DEVICE TYPE STATE CONNECTION
ens191 ethernet connected ens191
ens192 ethernet connected ens192
virbr0 bridge connected (externally) virbr0
lo loopback unmanaged --