DHCP for proxmox clients

[Siggib]

Hi all,

just started to use proxmox ..or trying that is.

I am running into problems with virtual machines not getting DHCP from my vmbr0 interface.. dhcp works in the interface.. but not on the clients

SERVER:
[Proxmox1 Production] root@grbsr0112 [ /etc/network ]$ dhclient -v
Internet Systems Consortium DHCP Client 4.2.2
Copyright 2004-2011 Internet Systems Consortium.
All rights reserved.
For info, please visit https://www.isc.org/software/dhcp/

Listening on LPF/vmbr0/f0:92:1c:0b:21:00
Sending on LPF/vmbr0/f0:92:1c:0b:21:00
Sending on Socket/fallback
DHCPREQUEST on vmbr0 to 255.255.255.255 port 67
DHCPACK from 10.8.3.254
RTNETLINK answers: File exists
Stopping NTP server: ntpd.
Starting NTP server: ntpd.
bound to 10.8.3.3 -- renewal in 330931 seconds.

config
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet dhcp

auto vmbr0
iface vmbr0 inet static
address 10.8.3.112
netmask 255.255.255.0
gateway 10.8.3.254
bridge_ports eth0
bridge_stp on
bridge_fd 0


ON the clients I get
[root@test network-scripts]# dhclient
Internet Systems Consortium DHCP Client V3.0.5-RedHat
Copyright 2004-2006 Internet Systems Consortium.
All rights reserved.
For info, please visit http://www.isc.org/sw/dhcp/

Listening on LPF/eth0/d6:8a:e9:99:71:33
Sending on LPF/eth0/d6:8a:e9:99:71:33
Sending on Socket/fallback
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 4 (xid=0x270aeed9)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7 (xid=0x270aeed9)
DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 21 (xid=0x270aeed9)



just hangs and no ip added to the machine?

Can someone point me in the right direction with this please?!

Best Regards
SIggi

 

[tom]

...

auto eth0
iface eth0 inet dhcp

...

you cannot use DHCP for the Host, you need to specify a fixed IP.

here is an example of a very simple host network:

# network interface settings
auto lo
iface lo inet loopback


iface eth0 inet manual


auto vmbr0
iface vmbr0 inet static
        address  192.168.7.201
        netmask  255.255.240.0
        gateway  192.168.2.1
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0

 

[Siggib]

Hi Tom!

Thank you for your answer, I have setup the vmbr0 as you describe.. however my virtual clients on this proxmox host are not getting DHCP from the vmbr0 :/ DHCP is obviously working however looks like the network setup of the Proxmox is not allowing or in some way blocking the virtual clients getting dhcp.. any idea ?

Now I have in the interfaces:

auto lo
iface lo inet loopback


iface eth0 inet manual

auto vmbr0
iface vmbr0 inet static
address 10.8.3.112
netmask 255.255.255.0
gateway 10.8.3.254
bridge_ports eth0
bridge_stp off
bridge_fd 0




-Siggi

 

[m.ardito]

note: if you change pve network config, you must reboot pve.

Marco

 

[Siggib]

Hi Marco,

I did reboot pve

-Siggi

 

[Siggib]

For further information for anyone with this problem.. it started working.. when I added Broadcast and Network to the mix along with bridge_stp on

auto vmbr0
iface vmbr0 inet static
address 10.8.3.112
netmask 255.255.255.0
network 10.8.3.0
broadcast 10.8.3.255
gateway 10.8.3.254
bridge_ports eth0
bridge_stp on
bridge_fd 0


Hope this can be of any help to other!

-Siggi

 

[m.ardito]

good that you solved you issue.
but my vm get dhcp but do not need those, only

auto vmbr0
iface vmbr0 inet static
        address  192.168.x.x
        netmask  255.255.255.0
        gateway  192.168.x.x
        bridge_ports eth0
        bridge_stp off
        bridge_fd 0

Marco