Vlans using nmtui

[mervgh]

I have been trying to create a vlan on my new Centos 7 build using nmtui and I am really confused.
Firstly I set up a static ip on my network card in nmtui see attached image.
I then tried adding a vlan
I set another ip on the vlan
so now I have ens160 and vlan and both set to active.

I am not sure what setting needs to change for it to work, any help appreciated. Please attached screenshots

Network file with static ip

Network.PNG (75.7 KiB) Viewed 14022 times

create vlan

createVlan.PNG (31.52 KiB) Viewed 14022 times

vlan5

vlan5.PNG (86.77 KiB) Viewed 14022 times

[TrevorH]

For start you are trying to use two ip addresses from the same subnet and that is not going to work well even without a VLAN in the mix.

In pre-NetworkManager days, you used to have an interface and then each VLAN had a separate interface file that had to be named after the VLAN it was on - so yours would be ens160 and ens160.5 (for VLAN 5). I am not sure if the same convention is still in use now but I would stick to it anyway... once you've picked a different subnet to use on your main interface and your VLAN.

[mervgh]

Hi Thanks for the reply, I did try creating ens160.5 That did not work as I was not sure how ens160 should be created and then the ens160.5 I tried a number of things but did not work.

thanks,

[aks]

Perhaps these will help:
https://access.redhat.com/documentation ... gging.html
https://access.redhat.com/documentation ... nmtui.html
https://access.redhat.com/documentation ... nmtui.html

[mervgh]

Thanks for your replies. Instead of using nmtui I created the files manually and it is still not working. Any help appreciated.

Parent

ens160.PNG (15.83 KiB) Viewed 13983 times

Vlan

ens160.5.PNG (37.77 KiB) Viewed 13983 times

[gerald_clark]

PREFIX=32 ?
Are you sure it should not be PREFIX=24 ?

[aks]

Disclaimer: I've not read all the updates, just the last one....

In IPv4 a prefix of /32 means this host, with this IP address and this host only (i.e.: not any other host on this subnet).