[SOLVED] PXE 5.3: No Network on Host

[bytegetter]

Hi,


I installed a fresh Debian (9.6) and installed PXE 5.3 over it.

After adding vmbr0 to /etc/network/interfaces the host has no working internet connection.

bytegetter@zotacproxmox:~$ cat /etc/network/interfaces
source /etc/network/interfaces.d/*

auto lo
iface lo inet loopback

iface enp2s0 inet manual

auto vmbr0
iface vmbr0 inet static
address 192.168.200.9
netmask 255.255.255.0
gateway 192.168.200.1
bridge_ports enp2s0
bridge_stp off
bridge_fd 0

bytegetter@zotacproxmox:~$ ip r
default via 192.168.200.1 dev enp2s0
192.168.200.0/24 dev enp2s0 proto kernel scope link src 192.168.200.9
192.168.200.0/24 dev vmbr0 proto kernel scope link src 192.168.200.9
bytegetter@zotacproxmox:~$ ip a
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
2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000
link/ether 00:01:2e:83:61:37 brd ff:ff:ff:ff:ff:ff
inet 192.168.200.9/24 brd 192.168.200.255 scope global enp2s0
valid_lft forever preferred_lft forever
3: enp3s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 00:01:2e:83:61:36 brd ff:ff:ff:ff:ff:ff
4: wlp1s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
link/ether 00:e1:8c:60:7c:af brd ff:ff:ff:ff:ff:ff
5: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether 00:01:2e:83:61:37 brd ff:ff:ff:ff:ff:ff
inet 192.168.200.9/24 brd 192.168.200.255 scope global vmbr0
valid_lft forever preferred_lft forever
bytegetter@zotacproxmox:~$ ping 192.168.200.1
PING 192.168.200.1 (192.168.200.1) 56(84) bytes of data.
From 192.168.200.9 icmp_seq=1 Destination Host Unreachable
^C
--- 192.168.200.1 ping statistics ---
3 packets transmitted, 0 received, +1 errors, 100% packet loss, time 2017ms

bytegetter@zotacproxmox:~$

Whats wrong?

Bytegetter

 

[Stoiko Ivanov]

did you reboot after editing `/etc/network/interfaces` ?
It seems like there is an ip configured on enp2s0, which is joined on vmbr0 - this won't work.

 

[bytegetter]

Hi, of course, I rebootet the machine.

With
iface enp2s0 inet static
address 192.168.200.9
netmask 255.255.255.0
gateway 192.168.200.1
and no vmbr0 the machine is reachable.

Changing the configuration and rebooting gives a non reachable machine. I´ve tried this 3 days long and can´t get it work..

 

[Stoiko Ivanov]

2: enp2s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000
link/ether 00:01:2e:83:61:37 brd ff:ff:ff:ff:ff:ff
inet 192.168.200.9/24 brd 192.168.200.255 scope global enp2s0
valid_lft forever preferred_lft forever

This says, that 192.168.200.9/24 is configured on enp2s0, which conflicts with the same configuration on vmbr0 - the question is where the ip on enp2s0 gets set - do you have any files in `/etc/network/interfaces.d` ?
Else - maybe try to grep in /etc for 192.168.200.9

 

[bytegetter]

Hi, this is courios.

On all of my machines is an IP on the hardware-interface and the bridge interface (ok, none of the machines is stable).

Interfaces.d is empty and mostly removed in /etc/network/interfaces.

root@zotacproxmox:/etc/network# ls -la if-up.d
insgesamt 36
drwxr-xr-x 2 root root 4096 Dez 7 21:18 .
drwxr-xr-x 7 root root 4096 Dez 9 00:10 ..
-rwxr-xr-x 1 root root 902 Dez 3 12:13 bridgevlan
-rwxr-xr-x 1 root root 409 Dez 3 12:13 bridgevlanport
-rwxr-xr-x 1 root root 1741 Sep 27 2016 ifenslave
-rwxr-xr-x 1 root root 236 Dez 3 12:13 mtu
-rwxr-xr-x 1 root root 972 Mär 1 2018 openssh-server
-rwxr-xr-x 1 root root 1117 Feb 23 2018 postfix
-rwxr-xr-x 1 root root 1483 Jun 2 2015 upstart
root@zotacproxmox:/etc/network#

I´ve installed a standard debian 9.6 netinstall (for hardware-encryption) and installed proxmox after this.

 

[bytegetter]

Solved.

I use fulldiskencryption. During boot the nic gets an ip via dhcp.

GRUB_CMDLINE_LINUX="ip=:::::enp2s0:dhcp"

This helps:

bytegetter@zotacproxmox:~$ cat /etc/network/interfaces
# network interface settings; autogenerated
# Please do NOT modify this file directly, unless you know what
# you're doing.
#
# If you want to manage part of the network configuration manually,
# please utilize the 'source' or 'source-directory' directives to do
# so.
# PVE will preserve these directives, but will NOT its network
# configuration from sourced files, so do not attempt to move any of
# the PVE managed interfaces into external files!

#source /etc/network/interfaces.d/*

auto lo
iface lo inet loopback

# linke Schnittstelle
iface enp2s0 inet manual
iface enp2s0 inet6 manual

# rechte Schnittstelle
iface enp3s0 inet manual
iface enp3s0 inet6 manual

# Bridge
auto vmbr0
iface vmbr0 inet static
        pre-up ip addr flush dev enp2s0
        address 192.168.200.9
        netmask 255.255.255.0
        gateway 192.168.200.1
        bridge_ports enp2s0
        bridge_stp off
        bridge_fd 0

 

[Stoiko Ivanov]

Glad you found the solution! Please mark the thread as SOLVED - so that others know what to expect - Thanks!