Connection issue after adding a new static IP

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OD3UNICRON

Member
Oct 23, 2022
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I'm not very good in networking, perhaps someone can guide me thru. So this how I started.

Code: 
root@UniMatrix001:~# ip -br -c a
lo               UNKNOWN        127.0.0.1/8 ::1/128
eno1np0          UP             
eno2np1          UP             
enp129s0f0       DOWN           
enp129s0f1       DOWN           
enx42d0f00f737b  DOWN           
vmbr0            UP             38.189.78.27/24 fe80::aaa1:59ff:fec2:7858/64
vmbr1            UP             38.189.78.26/24 fe80::aaa1:59ff:fec2:7859/64
tap100i0         UNKNOWN

I can SSH and login to Proxmox, but I can't update, I open shell and typed ping google.com and its unreachable.
Next step.

Code: 
root@UniMatrix001:~# ip -c link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eno1np0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr0 state UP mode DEFAULT group default qlen 1000
    link/ether a8:a1:59:c2:78:58 brd ff:ff:ff:ff:ff:ff
    altname enp66s0f0np0
3: eno2np1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr1 state UP mode DEFAULT group default qlen 1000
    link/ether a8:a1:59:c2:78:59 brd ff:ff:ff:ff:ff:ff
    altname enp66s0f1np1
4: enp129s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:25:90:3a:99:3e brd ff:ff:ff:ff:ff:ff
5: enp129s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:25:90:3a:99:3f brd ff:ff:ff:ff:ff:ff
6: enx42d0f00f737b: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 42:d0:f0:0f:73:7b brd ff:ff:ff:ff:ff:ff
7: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
    link/ether a8:a1:59:c2:78:58 brd ff:ff:ff:ff:ff:ff
8: vmbr1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
    link/ether a8:a1:59:c2:78:59 brd ff:ff:ff:ff:ff:ff
11: tap100i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr1 state UNKNOWN mode DEFAULT group default qlen 1000
    link/ether 02:2e:4f:24:44:0d brd ff:ff:ff:ff:ff:ff

As you see, I don't see any IP on any device, so my next step to type in Option A: ```ip addr add 38.189.78.27/24 dev eno1np0``` or Option:B ```ip addr add 38.189.78.27/24 dev vmbr0```

So option A or B? or I'm wrong?
 
Mr.Doubt said:
Could you post the Output of
ip r
Click to expand...
Code: 
root@UniMatrix001:~# ip r
default via 38.189.78.1 dev vmbr0 proto kernel onlink
38.189.78.0/24 dev vmbr0 proto kernel scope link src 38.189.78.27
38.189.78.0/24 dev vmbr1 proto kernel scope link src 38.189.78.26
 
Can you ping an IP-address (for example 8.8.8.8)?
Which nameserver you have configured?
cat /etc/resolv.conf

Edit: Why you use two adresse from the same Netzwork for both bridges?
 
Last edited:
Mr.Doubt said:
Can you ping an IP-address (for example 8.8.8.8)?
Which nameserver you have configured?
cat /etc/resolv.conf

Edit: Why you use two adresse from the same Netzwork for both bridges?
Click to expand...
Code: 
root@UniMatrix001:~# cat /etc/resolv.conf
search unimatrix001.net
nameserver 192.168.1.1
This wrong, it should be 38.189.78.1
I need two public IP because I'm using and app that needs it.
 
Last edited:
should I nano this? nano ```/etc/resolv.conf``` and change 192.168.1.1 to 38.189.78.1 then run systemctl restart networking? because I'm not using a router.
 
Last edited:
OD3UNICRON said:
should I nano this? nano ```/etc/resolv.conf``` and change 192.168.1.1 to 38.189.78.1 then run systemctl restart networking? because I'm not using a router.
Click to expand...

Yes, edit the /etc/resolv.conf. You don't need to restart anything.

The address you asigned to the bridge ist the Management adress of the PVE. VMs/CTs have their own configuration.

You could assign the 38.189.78.26 to the vmbr0. The 38.189.78.27 to VM/CT

If you don't need the PVE reachable from public, you can assign 0.0.0.0 to the vmbr1 an connect this bridge to the VMs/CTs. In the VM/CT configure the public IP and Gateway.
The vmbr0 can be used only in the private network formanagement (192.168.1.123).
 
Mr.Doubt said:
Yes, edit the /etc/resolv.conf. You don't need to restart anything.

The address you asigned to the bridge ist the Management adress of the PVE. VMs/CTs have their own configuration.

You could assign the 38.189.78.26 to the vmbr0. The 38.189.78.27 to VM/CT

If you don't need the PVE reachable from public, you can assign 0.0.0.0 to the vmbr1 an connect this bridge to the VMs/CTs. In the VM/CT configure the public IP and Gateway.
The vmbr0 can be used only in the private network formanagement (192.168.1.123).
Click to expand...
Code: 
oot@UniMatrix001:~# ip r
default via 38.189.78.1 dev vmbr0 proto kernel onlink
38.189.78.0/24 dev vmbr0 proto kernel scope link src 38.189.78.27
38.189.78.0/24 dev vmbr1 proto kernel scope link src 38.189.78.26
 
Mr.Doubt said:
Are you now able to resolv names an ping to eg. 8.8.8.8
Click to expand...
root@UniMatrix001:~# ping google.com
ping: google.com: Temporary failure in name resolution
root@UniMatrix001:~# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=114 time=23.4 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=114 time=23.3 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=114 time=23.4 ms
64 bytes from 8.8.8.8: icmp_seq=4 ttl=114 time=23.3 ms
64 bytes from 8.8.8.8: icmp_seq=5 ttl=114 time=23.5 ms
64 bytes from 8.8.8.8: icmp_seq=6 ttl=114 time=23.2 ms
64 bytes from 8.8.8.8: icmp_seq=7 ttl=114 time=23.6 ms
64 bytes from 8.8.8.8: icmp_seq=8 ttl=114 time=23.5 ms
64 bytes from 8.8.8.8: icmp_seq=9 ttl=114 time=23.2 ms
64 bytes from 8.8.8.8: icmp_seq=10 ttl=114 time=23.4 ms
64 bytes from 8.8.8.8: icmp_seq=11 ttl=114 time=23.3 ms
64 bytes from 8.8.8.8: icmp_seq=12 ttl=114 time=23.3 ms
64 bytes from 8.8.8.8: icmp_seq=13 ttl=114 time=23.3 ms
64 bytes from 8.8.8.8: icmp_seq=14 ttl=114 time=23.1 ms
64 bytes from 8.8.8.8: icmp_seq=15 ttl=114 time=23.2 ms
64 bytes from 8.8.8.8: icmp_seq=16 ttl=114 time=23.3 ms
^C
--- 8.8.8.8 ping statistics ---
16 packets transmitted, 16 received, 0% packet loss, time 15021ms
rtt min/avg/max/mdev = 23.147/23.334/23.610/0.129 ms
 
OD3UNICRON said:
I'm not very good in networking, perhaps someone can guide me thru. So this how I started.

Code: 
root@UniMatrix001:~# ip -br -c a
lo               UNKNOWN        127.0.0.1/8 ::1/128
eno1np0          UP            
eno2np1          UP            
enp129s0f0       DOWN          
enp129s0f1       DOWN          
enx42d0f00f737b  DOWN          
vmbr0            UP             38.189.78.27/24 fe80::aaa1:59ff:fec2:7858/64
vmbr1            UP             38.189.78.26/24 fe80::aaa1:59ff:fec2:7859/64
tap100i0         UNKNOWN

I can SSH and login to Proxmox, but I can't update, I open shell and typed ping google.com and its unreachable.
Next step.

Code: 
root@UniMatrix001:~# ip -c link show
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
2: eno1np0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr0 state UP mode DEFAULT group default qlen 1000
    link/ether a8:a1:59:c2:78:58 brd ff:ff:ff:ff:ff:ff
    altname enp66s0f0np0
3: eno2np1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq master vmbr1 state UP mode DEFAULT group default qlen 1000
    link/ether a8:a1:59:c2:78:59 brd ff:ff:ff:ff:ff:ff
    altname enp66s0f1np1
4: enp129s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:25:90:3a:99:3e brd ff:ff:ff:ff:ff:ff
5: enp129s0f1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 00:25:90:3a:99:3f brd ff:ff:ff:ff:ff:ff
6: enx42d0f00f737b: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT group default qlen 1000
    link/ether 42:d0:f0:0f:73:7b brd ff:ff:ff:ff:ff:ff
7: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
    link/ether a8:a1:59:c2:78:58 brd ff:ff:ff:ff:ff:ff
8: vmbr1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP mode DEFAULT group default qlen 1000
    link/ether a8:a1:59:c2:78:59 brd ff:ff:ff:ff:ff:ff
11: tap100i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr1 state UNKNOWN mode DEFAULT group default qlen 1000
    link/ether 02:2e:4f:24:44:0d brd ff:ff:ff:ff:ff:ff

As you see, I don't see any IP on any device, so my next step to type in Option A: ```ip addr add 38.189.78.27/24 dev eno1np0``` or Option:B ```ip addr add 38.189.78.27/24 dev vmbr0```

So option A or B? or I'm wrong?
Click to expand...
My concern that none of these devices are not showing any IP.
 
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