Is it possible to run two VLAN's on one physical NIC? I want to use VLAN 1 (10.0.0.0/24) as an admin network, and VLAN 2 (10.0.1.0/24) as a network for the VM's. Is this possible with only one NIC card, and can I use both KVM and OpenVZ guests in this configuration?
One NIC... two VLAN's, how to confugure?
- Thread starter digilink
- Start date
Hi,
of course you can use many VLANs. You only need allways all VLANs tagged (no default-vlan).
Create for each vlan an brigde - on this bridge you can connect also kvm and openvz-guests.
/etc/network/interfaces
Code:
# network interface settings
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 0.0.0.0
netmask 0.0.0.0
auto eth0.1
iface eth0.1 inet static
address 0.0.0.0
netmask 0.0.0.0
auto eth0.2
iface eth0.2 inet static
address 0.0.0.0
netmask 0.0.0.0
auto vmbr1
iface vmbr1 inet static
address 192.20.10.10
netmask 255.255.255.0
gateway 192.20.10.254
bridge_ports eth0.1
bridge_stp off
bridge_fd 0
auto vmbr2
iface vmbr2 inet manual
bridge_ports eth0.2
bridge_stp off
bridge_fd 0(If you go for a cluster use vmbr0 for clustercommunication instead of vmbr1 - but vmbr1 for vlan1 is simple...)
Udo
Last edited:
This works... somewhat
I can not seem to get to the internet in this config however, what am I missing? Here's my /etc/network/interfaces:
Code:
auto lo
iface lo inet loopback
# VLAN
auto eth0
iface eth0 inet static
address 0.0.0.0
netmask 0.0.0.0
auto eth0.1
iface eth0.1 inet static
address 0.0.0.0
netmask 0.0.0.0
auto eth0.2
iface eth0.2 inet static
address 0.0.0.0
netmask 0.0.0.0
auto vmbr0
iface vmbr0 inet static
address 10.0.0.3
netmask 255.255.255.0
gateway 10.0.0.1
bridge_ports eth0.1
bridge_stp off
bridge_fd 0
auto vmbr1
iface vmbr1 inet static
address 10.0.1.2
netmask 255.255.255.0
gateway 10.0.1.1
bridge_ports eth0.2
bridge_stp off
bridge_fd 0Re: One NIC... two VLAN's, how to configure?
looks ok.
BTW: you don't need an ip on the second bridge.
To find the issue, look with tcpdump. I assume that your switch don't tagged the vlan1.
during ping 10.0.0.1 should show tagged packets like this:
Udo
Hi,This works... somewhat
...
looks ok.
BTW: you don't need an ip on the second bridge.
To find the issue, look with tcpdump. I assume that your switch don't tagged the vlan1.
Code:
tcpdump -i eth0 -n | grep 10.0.0.1
Code:
10:40:48.281798 vlan 1, p 0, IP 10.0.0.3 > 10.0.0.1: ICMP echo request, id 41656, seq 1, length 64
10:40:48.282045 vlan 1, p 0, IP 10.0.0.1 > 10.0.0.3: ICMP echo reply, id 41656, seq 1, length 64Re: One NIC... two VLAN's, how to configure?
Finally got this hammered out, thanks for the help
The fix was that I had two default gateways, which was causing my problem. Here's my updated /etc/network/interfaces:
Once I took the gateway entry out for vmbr1, everything started working as expected.
Finally got this hammered out, thanks for the help
The fix was that I had two default gateways, which was causing my problem. Here's my updated /etc/network/interfaces:
Code:
# network interface settings
auto lo
iface lo inet loopback
auto eth0
iface eth0 inet static
address 0.0.0.0
netmask 0.0.0.0
auto eth0.1
iface eth0.1 inet static
address 0.0.0.0
netmask 0.0.0.0
auto eth0.2
iface eth0.2 inet static
address 0.0.0.0
netmask 0.0.0.0
auto vmbr0
iface vmbr0 inet static
address 10.0.0.3
netmask 255.255.255.0
gateway 10.0.0.1
bridge_ports eth0.1
bridge_stp off
bridge_fd 0
auto vmbr1
iface vmbr1 inet static
address 10.0.1.2
netmask 255.255.255.0
bridge_ports eth0.2
bridge_stp off
bridge_fd 0Once I took the gateway entry out for vmbr1, everything started working as expected.
B
breakaway
Guest
Re: One NIC... two VLAN's, how to configure?
Hi Digilink / Udo,
Thanks for these config. Question: For these portion of the codes
Can it be changed to these and still get the exact same result?
Finally got this hammered out, thanks for the help
The fix was that I had two default gateways, which was causing my problem. Here's my updated /etc/network/interfaces:
Code:# network interface settings auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 0.0.0.0 netmask 0.0.0.0 auto eth0.1 iface eth0.1 inet static address 0.0.0.0 netmask 0.0.0.0 auto eth0.2 iface eth0.2 inet static address 0.0.0.0 netmask 0.0.0.0 auto vmbr0 iface vmbr0 inet static address 10.0.0.3 netmask 255.255.255.0 gateway 10.0.0.1 bridge_ports eth0.1 bridge_stp off bridge_fd 0 auto vmbr1 iface vmbr1 inet static address 10.0.1.2 netmask 255.255.255.0 bridge_ports eth0.2 bridge_stp off bridge_fd 0
Once I took the gateway entry out for vmbr1, everything started working as expected.
Hi Digilink / Udo,
Thanks for these config. Question: For these portion of the codes
Code:
auto eth0
iface eth0 inet static
address 0.0.0.0
netmask 0.0.0.0
auto eth0.1
iface eth0.1 inet static
address 0.0.0.0
netmask 0.0.0.0
auto eth0.2
iface eth0.2 inet static
address 0.0.0.0
netmask 0.0.0.0Can it be changed to these and still get the exact same result?
Code:
auto eth0
iface eth0 inet manual
auto eth0.1
iface eth0.1 inet manual
auto eth0.2
iface eth0.2 inet manual