Failure Bridges when disconnect network cable on first nic

[Ricardo M.]

I have two supermicro servers with Proxmox 5.2-6 installed. I installed Debian 9 first
following the manual.
In each one we have 4 network cards, 2 motherboard integrated and 2 with a dual port network card intel i350.
I have made the installation correctly and I have added 4 bridges one on each card to use it in different virtual machines.
When I have disconnected the network cable from the first integrated card, the rest stops working and I can not connect to any of the bridges and I cant connect to the web proxmox interfaces.

This is my network interface config

source /etc/network/interfaces.d/*

auto lo

iface enp3s0f0 inet manual

iface enp129s0f0 inet manual

iface enp129s0f1 inet manual

iface enp3s0f1 inet manual

auto vmbr0
iface vmbr0 inet static
        address  192.168.200.10
        netmask  255.255.255.0
        gateway  192.168.200.1
        bridge-ports enp3s0f0
        bridge-stp off
        bridge-fd 0
#INTEGRATED

auto vmbr1
iface vmbr1 inet static
        address  192.168.200.12
        netmask  255.255.255.0
        bridge-ports enp3s0f1
        bridge-stp off
        bridge-fd 0
#INTEGRATED
auto vmbr2
iface vmbr2 inet static
        address  192.168.200.14
        netmask  255.255.255.0
        bridge-ports enp129s0f0
        bridge-stp off
        bridge-fd 0
#INTEL 2 PORTS
auto vmbr3
iface vmbr3 inet static
        address  192.168.200.16
        netmask  255.255.255.0
        bridge-ports enp129s0f1
        bridge-stp off
        bridge-fd 0
#INTEL 2 PORTS

 pveversion -v
proxmox-ve: 5.2-2 (running kernel: 4.15.18-1-pve)
pve-manager: 5.2-6 (running version: 5.2-6/bcd5f008)
pve-kernel-4.15: 5.2-4
pve-kernel-4.15.18-1-pve: 4.15.18-17
corosync: 2.4.2-pve5
criu: 2.11.1-1~bpo90
glusterfs-client: 3.8.8-1
ksm-control-daemon: not correctly installed
libjs-extjs: 6.0.1-2
libpve-access-control: 5.0-8
libpve-apiclient-perl: 2.0-5
libpve-common-perl: 5.0-37
libpve-guest-common-perl: 2.0-17
libpve-http-server-perl: 2.0-9
libpve-storage-perl: 5.0-24
libqb0: 1.0.1-1
lvm2: 2.02.168-pve6
lxc-pve: 3.0.0-3
lxcfs: 3.0.0-1
novnc-pve: 1.0.0-2
proxmox-widget-toolkit: 1.0-19
pve-cluster: 5.0-29
pve-container: 2.0-24
pve-docs: 5.2-5
pve-firewall: 3.0-13
pve-firmware: 2.0-5
pve-ha-manager: 2.0-5
pve-i18n: 1.0-6
pve-libspice-server1: 0.12.8-3
pve-qemu-kvm: 2.11.2-1
pve-xtermjs: 1.0-5
qemu-server: 5.0-30
smartmontools: 6.5+svn4324-1
spiceterm: 3.0-5
vncterm: 1.5-3

Any idea??

 

[wolfgang]

Hi,

you only use the first nic.

If all nics are in the same subnet your default routing use only one nic.
What do you try to archive with 4 nics in the same network with different IPs?

 

[Ricardo M.]

That was the solution,

thank you for your response.