I set a static IP on my only virtio Network card. but smh ucs is creating another IP on the same card. I think this can result in problems (rn it seems to work). is there somehtign I can do to debug?:

UCS - Univention Corporate Server
1

I set a static IP on my only virtio Network card.
but smh ucs is creating another IP on the same card. I think this can result in problems (rn it seems to work).
is there something I can do to debug?:

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: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether aa:db:21:67:24:fe brd ff:ff:ff:ff:ff:ff
    inet 10.255.252.183/24 brd 10.255.252.255 scope global dynamic eth0
       valid_lft 6943sec preferred_lft 6943sec
    inet 10.255.252.1/24 brd 10.255.255.255 scope global secondary eth0
       valid_lft forever preferred_lft forever
    inet6 fe80::a8db:21ff:fe67:24fe/64 scope link 
       valid_lft forever preferred_lft forever
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default 
    link/ether 02:42:91:c1:9e:61 brd ff:ff:ff:ff:ff:ff
    inet 172.17.42.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
2

I actually lose network completely from time to time… but only from this VM. not from any other. and only a reboot solves the problem for some time, where I again have both ips on one interface

3

You can have multiple ip’s on the same card.
I do it.
But you have to decide how it is done & if you want ucs to manage it.
and it HAS to be done in a specific way…

instead of showing this,
show the actual config files.

This display means very little, if the settings re fighting.

4

@talleyrand
I didn’t use a config file myself. where is the relevant config on univention?

5

I found the settings, but they are 100% correct, just showing the one static IP I want to use:

image

6

my problem really is:
when I reboot for some time both IP’s which I can observe using “ip a” are working.
but after some time there is no IP anymore and the server will not respond till I reboot him!

7

go to:
[Univention Configuration Registry]

search for “network”

then you will see something LIKE :

interfaces/ens192/network

this is for a single network card… sometimes i have seen ens192:0. & ens192:1
for multiple ip subnets on the same card
or
ens192
ens 132
for multiple cards.

8

I use cloudinit and this special UCS setup script to setup UCS.
So it created a cloudinit config for DHCP additionally to the IP I defined in the UCS setup script…
The easiest solution was to just remove this file in the script setting up UCS.

9

thank you for replying.