many VNIC's (Virtual Network card) on one physical NIC

posterman · 06-13-2006, 04:03 PM

Please help me to find module for VNIC.
About year ago I downloaded one module, which help me generate many virtual network interfaces on one physical interface on Linux with different IP and MAC addresses and bridged with the physical interface.
I forget the name, and now I’m trying to find it, but have not success…. I looked all available search engines and forums…

Thanks in advance!

Brian1 · 06-13-2006, 05:55 PM

Do you mean Aliasing IP? eth0:0
If so then it is usually normally configured into the kernel. It is the TCPIP Networking item or called ' config_inet ' from a kernel config file.

Brian1

posterman · 06-15-2006, 05:56 AM

No, I'm not mean Aliasing IP eth0:0,
In aliasing case you can't assign different MAC address to that alias interface...

////// · 06-15-2006, 06:30 AM

Do you mean bridge_utils ?

http://sourceforge.net/project/showf...group_id=26089

posterman · 06-15-2006, 01:20 PM

No, with bridge_utils you can create virtual interface, and connect to it many interfaces, but each interface only once, it means that you can't create many virtual interfaces based on one physical interface.

My problem is having many virtual cards (with differenet MAC addresses, and bridged with physical network card) on one physical card.

osor · 06-15-2006, 02:07 PM

Are you trying to do network simulations? Do you want a tap interface? Did you have a look at netkit?

posterman · 06-16-2006, 03:20 PM

Yeah I want something like a "tap" interface, but "netkit" is not enough for me, because "tap" interface created with "netkit" not working like a virtual network card with different MAC address.
It is just show different MAC address on created “tap” interface, but when I'm connecting with that virtual interface or when I'm sending some request to ip address of that virtual interface, in arp table I can see only MAC address of real interface.
It means that it only show that my new virtual interface has different MAC address, but in real it communicates with MAC address of real network card.

osor · 06-16-2006, 04:11 PM

I finally understand what you want. I have no idea right now. Intereseting problem. Still researching.

posterman · 06-19-2006, 05:51 AM

Ok Osor,
Thanks in advance!

osor · 07-06-2006, 12:03 PM

Wow, it's been a long time. Somehow I completely forgot about this thread. My apologies.

Anyway, have you found a solution yet? One thing that I found interesting was linux's 802.1q implementation, which allows VLANs to exist for actual physical interfaces. You need to have a kernel that supports it (either built-in or module), and you need the vconfig program.

Here's what I did (it seemed to work for me):

Code:

# ip link show
1: eth0: <BROADCAST,MULTICAST,PROMISC,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:04:61:02:31:7f brd ff:ff:ff:ff:ff:ff
2: wan0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:04:61:02:31:80 brd ff:ff:ff:ff:ff:ff
3: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
# vconfig add eth0 1
# ip link show
1: eth0: <BROADCAST,MULTICAST,PROMISC,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:04:61:02:31:7f brd ff:ff:ff:ff:ff:ff
2: wan0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:04:61:02:31:80 brd ff:ff:ff:ff:ff:ff
3: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
4: eth0.1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop
    link/ether 00:04:61:02:31:7f brd ff:ff:ff:ff:ff:ff
# ip link set dev eth0.1 address 00:04:61:02:31:7e
# ip addr add 192.168.2.1/24 dev eth0.1
# ip addr show
1: eth0: <BROADCAST,MULTICAST,PROMISC,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:04:61:02:31:7f brd ff:ff:ff:ff:ff:ff
    inet 192.168.1.1/24 brd 192.168.1.255 scope global eth0
2: wan0: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast qlen 1000
    link/ether 00:04:61:02:31:80 brd ff:ff:ff:ff:ff:ff
    inet 64.179.4.146/24 brd 255.255.255.255 scope global wan0
3: lo: <LOOPBACK,UP> mtu 16436 qdisc noqueue
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
4: eth0.1: <BROADCAST,MULTICAST,UP> mtu 1500 qdisc noop
    link/ether 00:04:61:02:31:7e brd ff:ff:ff:ff:ff:ff
    inet 192.168.2.1/24 scope global eth0.1

Is this what you needed?

EDIT: changed public IP address to protect my identity (it doesn't really matter, but I substituted one of LQ's for mine)