Re: [CentOS] Centos 8 two network cards

2021-07-15 Thread Ken Smith via CentOS



Johnny Hughes wrote:

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
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All fixed - awesome - thank you :-)


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Re: [CentOS] Centos 8 two network cards

2021-07-15 Thread Valeri Galtsev




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

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Re: [CentOS] Centos 8 two network cards

2021-07-15 Thread 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?

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
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[CentOS] Centos 8 two network cards

2021-07-15 Thread Ken Smith via CentOS
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



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