> On Mon, Jan 18, 2021 at 2:56 PM Jerry Geis <jerry.geis at gmail.com> wrote: > >> Hi All, >> >> I use virtual IP from time to time on CentOS 7. just take something like >> eth0 and make eth0:1 put in there the IP and subnet and bring up the new >> IP >> and it works. >> >> How do I do that with NetworkManager on the command line (assuming all >> static IP information) >> I do something like this from nmcli to set the static address: >> nmcli connection modify eth0 ipv4.method manual ipv6.method ignore >> autoconnect yes ipv4.addr 192.168.1.8/24 gw4 192.168.1.1 ipv4.dns >> 8.8.8.8 >> >> How then do I add a virtual IP? >> >> Thanks >> >> Jerry > > > With nmcli you should use: > nmcli con mod eth0 +ipv4.addresses 192.168.1.X/24 > > This would modify your existing ifcfg-eth0 adding the lines: > > IPADDR1=192.168.1.X > PREFIX1=24 > > To have the new setting applied and your new ip alias up and running you > can then use > > nmcli dev reapply eth0 > (supposing the device name bound to the connection is eth0) > > You can also manually modify the file adding the two lines above and then > run: > nmcli con reload > nmcli dev reapply eth0 > > I think you should not lose your connection, but always test on a non > production machine with the same os version... just for safety > HIH, > Gianluca Hi Gianluca, Am I right that what you describe doesn't add an alias device like eth0:1 but adds the additional IP address to the eth0 device? Apart from that, when running with NetworkManager, can one still add a temporary eth0:1 alias (with ifconfig/ip), use it and remove it again, or does NM somehow prevent this? Regards, Simon