Configure Network-Bridge

A

astrakid

Renowned Member
Jun 13, 2013
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1
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Hi,
I have some problems configuring my VMs to access them from my internal LAN.
my network: 192.168.9.0
my router and dhcp-server: 192.168.9.2
my server hosting VMs (proxmox): 192.168.9.1

in proxmox i have configured eth0 with 192.168.9.1, gateway 192.168.9.2, vmbr0 with ip 192.168.9.20. both are active.

after setting up a new VM i configured its network to be in bridged mode. via console i configured /etc/network/interfaces to:
auto eth0
address 192.168.9.21
netmask 255.255.255.0
gateway 192.168.9.2
dns-nameservers 192.168.9.2

when booting this vm, it receives an ip address 192.168.9.103. but i am not able to access the server from any pc on my network (only via console of proxmox).

can some one give me a hint? why is dhcp obviously active on this vm? what do i have to configure to be able to access my vm from any pc on my local network?

kind regards,
astrakid
 
Hi !

Why you set eth0 with 192.168.9.1 (Proxmox IP) *and* a vmbr with IP (192.168.9.20) ?
If you use eth0 for Proxmox, can use vmbr linked to eth1 without IP or a unique vmbr0 linked to eth0 with a single IP.

I suppose an error in network configuration on (Unix) VM

Luca
 
dea said:
Hi !
If you use eth0 for Proxmox, can use vmbr linked to eth1 without IP or a unique vmbr0 linked to eth0 with a single IP.
Luca
Click to expand...

i understand:
configure server eth0 with 192.168.9.1 and link vmbr to eth1 or
link vmbr0 to eth0 with eth0's ip 192.168.9.1, vmbr0 without ip-address?

will try it...

kind regards,
astrakid
 
astrakid said:
i understand:
configure server eth0 with 192.168.9.1 and link vmbr to eth1 or
link vmbr0 to eth0 with eth0's ip 192.168.9.1, vmbr0 without ip-address?

will try it...

kind regards,
astrakid
Click to expand...

ETH0 -> IP (console)
ETH1 -> VMBR0 (without IP)

OR

ETH0 -> VMBR0 (with IP)

OR

ETH0 && ETH1 -> BOND0 (set as fault tollerance, for example)
BOND0 -> VMBR0 (with IP)

Luca
 
hi,
it is not working...
this is my network-config (proxmox-server):

# network interface settingsauto lo
iface lo inet loopback


auto eth0
iface eth0 inet static
address 192.168.2.1
netmask 255.255.255.0
gateway 192.168.2.2


auto vmbr0
iface vmbr0 inet manual
bridge_ports eth1
bridge_stp off
bridge_fd 0


auto eth1
iface eth1 inet static
Click to expand...

but ifconfig shows:

root@server:~# ifconfigeth0 Link encap:Ethernet Hardware Adresse d4:3d:7e:54:01:a4
inet Adresse:192.168.9.1 Bcast:192.168.9.255 Maske:255.255.255.0
inet6-Adresse: fe80::d63d:7eff:fe54:1a4/64 Gültigkeitsbereich:Verbindung
UP BROADCAST RUNNING MULTICAST MTU:1500 Metrik:1
RX packets:3320 errors:0 dropped:0 overruns:0 frame:0
TX packets:2640 errors:0 dropped:0 overruns:0 carrier:0
Kollisionen:0 Sendewarteschlangenlänge:1000
RX bytes:802362 (783.5 KiB) TX bytes:2100027 (2.0 MiB)
Interrupt:27 Basisadresse:0x8000


lo Link encap:Lokale Schleife
inet Adresse:127.0.0.1 Maske:255.0.0.0
inet6-Adresse: ::1/128 Gültigkeitsbereich:Maschine
UP LOOPBACK RUNNING MTU:16436 Metrik:1
RX packets:964 errors:0 dropped:0 overruns:0 frame:0
TX packets:964 errors:0 dropped:0 overruns:0 carrier:0
Kollisionen:0 Sendewarteschlangenlänge:0
RX bytes:646883 (631.7 KiB) TX bytes:646883 (631.7 KiB)


tap101i0 Link encap:Ethernet Hardware Adresse 56:2d:3b:0b:a5:b8
inet6-Adresse: fe80::542d:3bff:fe0b:a5b8/64 Gültigkeitsbereich:Verbindung
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metrik:1
RX packets:139 errors:0 dropped:0 overruns:0 frame:0
TX packets:12 errors:0 dropped:0 overruns:0 carrier:0
Kollisionen:0 Sendewarteschlangenlänge:500
RX bytes:9774 (9.5 KiB) TX bytes:864 (864.0 B)


venet0 Link encap:UNSPEC Hardware Adresse 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
inet6-Adresse: fe80::1/128 Gültigkeitsbereich:Verbindung
UP BROADCAST PUNKTZUPUNKT RUNNING NOARP MTU:1500 Metrik:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:3 overruns:0 carrier:0
Kollisionen:0 Sendewarteschlangenlänge:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)


vmbr0 Link encap:Ethernet Hardware Adresse 56:2d:3b:0b:a5:b8
inet6-Adresse: fe80::ec76:65ff:fea1:da43/64 Gültigkeitsbereich:Verbindung
UP BROADCAST RUNNING MULTICAST MTU:1500 Metrik:1
RX packets:137 errors:0 dropped:0 overruns:0 frame:0
TX packets:6 errors:0 dropped:0 overruns:0 carrier:0
Kollisionen:0 Sendewarteschlangenlänge:0
RX bytes:7676 (7.4 KiB) TX bytes:468 (468.0 B)
Click to expand...

my vm gets 192.168.9.21, but is not reachable (neither from the proxmox-server, nor from other pcs inside my lan).

what is wrong?

edit: question regarding "ETH0 -> VMBR0 (with IP)": in this case either eth0 or vmbr0 gets an ip-address, or both? in case that only vmbr0 gets an ip-address, i won't be able to access my proxmox-management-gui, right?

regards,
astrakid
 
Last edited:
astrakid said:
hi,
it is not working...
this is my network-config (proxmox-server):



but ifconfig shows:



my vm gets 192.168.9.21, but is not reachable (neither from the proxmox-server, nor from other pcs inside my lan).

what is wrong?



regards,
astrakid
Click to expand...

I think the VM network configuration.
Proxmox can use the net ? (apt-get update works ?)
Try to set a static configuration on VM

Luca
 
hi,
i got it working.
i followed another tutorial from the web, and that was quite straight forward. my problem was, that bridging worked, but then i couldn't access my proxmox-physical-server anmore by network. the vm was accessible.
the tutorial helped me:
eth0 is not configured, only the bridge:

auto vmbr0
iface vmbr0 inet static
address 192.168.9.1
broadcast 192.168.9.255
gateway 192.168.9.2
bridge_ports eth0
bridge_stp off
bridge_fd 9
bridge_hello 2
bridge_maxage 12

that works fine!

regards,
andre
 
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