[SOLVED] Bridging only one Interface / eth in br0, passthrough dedicated NIC

Hi Guys,

 

I got a CPU with VT-d and built in a new intel dualport gigabit nic for passthrough purpose.

Idea is virtualising a firewall os and give that machine the whole nic later on.

 

I also have a br0 device in unraid, that consisted of eth0 only before. Bound to the ip over which I can reach unraid itself and also

configured as bridge interface for my VMs as I dont like using the kvm virtual bridge.

 

Now after the upgrade, unraid bounds both of the 2 new interfaces of the new nic automatically to br0

bridge name     bridge id               STP enabled     interfaces
br0             8000.001b21a6fdc6       yes             eth0 --> (nic0)
                                                                           eth1 --> (onboard)
                                                                           eth2 --> (nic0)

see

00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (2) I219-V (rev 31)
01:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01)
01:00.1 Ethernet controller: Intel Corporation 82576 Gigabit Network Connection (rev 01)

 

6: eth0: <NO-CARRIER,BROADCAST,MULTICAST,PROMISC,UP> mtu 1500 qdisc mq master br0 state DOWN qlen 1000
    link/ether 00:1b:21:a6:fd:c6 brd ff:ff:ff:ff:ff:ff
7: eth1: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master br0 state UP qlen 1000
    link/ether 30:5a:3a:06:60:48 brd ff:ff:ff:ff:ff:ff
8: eth2: <NO-CARRIER,BROADCAST,MULTICAST,PROMISC,UP> mtu 1500 qdisc mq master br0 state DOWN qlen 1000
    link/ether 00:1b:21:a6:fd:c7 brd ff:ff:ff:ff:ff:ff
9: br0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP
    link/ether 00:1b:21:a6:fd:c6 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.100/20 brd 192.168.15.255 scope global br0
       valid_lft forever preferred_lft forever

 

 

My question is,

is there a way to change the bridge in /boot/config/network.cfg

to bound only to eth1 in this case.

 

Or do I have to use the /boot/config/go

file to set up my own startup script with brctl delif br0 eth0

etc..

 

 

# Generated settings:
USE_DHCP="no"
IPADDR="192.168.0.100"
NETMASK="255.255.240.0"
GATEWAY="192.168.0.1"
DHCP_KEEPRESOLV="no"
DNS_SERVER1="192.168.0.1"
DNS_SERVER2=""
DNS_SERVER3=""
BONDING="no"
BONDING_MODE="1"
BRIDGING="yes"
BRNAME="br0"
BRSTP="yes"
BRFD="0"

 

I don't want to touch unraid the dedicated interface at all. Not this one and not new ones I probably will add to the system.

 

Thanks in advance

 

------

 

 

So I solved it by myself.

 

If you have the same problem, you will find help in this description

http://lime-technology.com/forum/index.php?topic=39638.15

 

and more detailed on the domain, bus, slot and function parameters in this one

https://lime-technology.com/forum/index.php?topic=38259.msg368555#msg368555