Hi folks, I'm a bit confused about how to set up two network cards in different LANS in C8. I've done this multiple times in Centos6 and lower, but in the NetworkManager/systemd world I'm all at sea without any charts. (I'm sure there's a HKLM in there somewhere -sorry ;-)) and my Googlefoo is failing me this evening. Via the GUI it will let me configure one device or the other but not both :-( Anyway I want one NIC with IP 10.100.0.2/24 and GW 10.100.0.1 and the other with IP 10.2.0.2/24 and no gateway. I've seen a method that removes NetworkManager and installs network-scripts then configures the ifcfg-eth0 and ifcfg-eth1 scripts. Interestingly the devices seem to be still called eth0 & 1 on this system which happens to be a VM. When I use this method the systemctl start network appears not to be able to find eth1. Is there a recommended way to do this? I'd prefer to use 'approved' techniques rather than work arounds. Any suggestions? Thanks Ken -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.
On 7/15/21 2:39 PM, Ken Smith via CentOS wrote:> Hi folks, I'm a bit confused about how to set up two network cards in > different LANS in C8. I've done this multiple times in Centos6 and > lower, but in the NetworkManager/systemd world I'm all at sea without > any charts. (I'm sure there's a HKLM in there somewhere -sorry ;-)) and > my Googlefoo is failing me this evening. > > Via the GUI it will let me configure one device or the other but not > both :-( > > Anyway I want one NIC with IP 10.100.0.2/24 and GW 10.100.0.1 > and the other with IP 10.2.0.2/24 and no gateway. > > I've seen a method that removes NetworkManager and installs > network-scripts then configures the ifcfg-eth0 and ifcfg-eth1 scripts. > Interestingly the devices seem to be still called eth0 & 1 on this > system which happens to be a VM. When I use this method the systemctl > start network appears not to be able to find eth1. > > Is there a recommended way to do this? I'd prefer to use 'approved' > techniques rather than work arounds. > > Any suggestions?https://linuxconfig.org/rhel-8-configure-static-ip-address https://www.tecmint.com/set-static-ip-address-in-rhel-8/ Both of those go over the 3 basic ways to set up IP addresses manually (edit the script, use command line tool called nmcli, or use the curses based TUI tool called nmtui. Thanks, Johnny Hughes
On 7/15/21 2:39 PM, Ken Smith via CentOS wrote:> Hi folks, I'm a bit confused about how to set up two network cards in > different LANS in C8. I've done this multiple times in Centos6 and > lower, but in the NetworkManager/systemd world I'm all at sea without > any charts. (I'm sure there's a HKLM in there somewhere -sorry ;-)) and > my Googlefoo is failing me this evening. > > Via the GUI it will let me configure one device or the other but not > both :-( > > Anyway I want one NIC with IP 10.100.0.2/24 and GW 10.100.0.1 > and the other with IP 10.2.0.2/24 and no gateway. > > I've seen a method that removes NetworkManager and installs > network-scripts then configures the ifcfg-eth0 and ifcfg-eth1 scripts. > Interestingly the devices seem to be still called eth0 & 1 on this > system which happens to be a VM. When I use this method the systemctl > start network appears not to be able to find eth1. > > Is there a recommended way to do this? I'd prefer to use 'approved' > techniques rather than work arounds. > > Any suggestions? >This is for Debian, but it must be the same in CentOS. Being in Debian a "beginner" who fled CentOS, this one operation (configuring second network card) is the last only operation which I still use GUI for, not command line tools or Better editing config files... Start network manager editor (on Debian the command is: nm-connection-editor) Click Ethernet click "+" choose "Ethernet" as connection type. change name of new connection to "Wired connection 2" and configure all parameters, make sure you choose correct ethernet adapter in one of dro-downs. I hope, this helps. Valeri> Thanks > > Ken > > >-- ++++++++++++++++++++++++++++++++++++++++ Valeri Galtsev Sr System Administrator Department of Astronomy and Astrophysics Kavli Institute for Cosmological Physics University of Chicago Phone: 773-702-4247 ++++++++++++++++++++++++++++++++++++++++