We are having trouble with our bonded NICs + vlan + bridged network configuration. We have a blade server running RHEL6, and are trying to set up the networking for KVM virtualisation.
The blade server has 2 NICs (p2p1 and p2p2) which connect to the internal blade chassis 10 Gb switches. We want to bond the 2 blade NICs and setup
- default vlan (vlan 1) for our production network (172.16.x.x) assigned via DHCP, and
- vlan 3 on our storage network (192.168.10.x) statically assigned.
There is an added complication that the KVM guests need to connect to our production network, and so we also need a bridge on the production network.
DEVICE=”p2p1” BOOTPROTO=”none” HWADDR=[Removed] NM_CONTROLLED=”no” ONBOOT=”yes” TYPE=”Ethernet” UUID=[Removed] MASTER=bond0 SLAVE=yes USERCTL=no DEVICE=”p2p2” BOOTPROTO=”none” HWADDR=[Removed] NM_CONTROLLED=”no” ONBOOT=”yes” TYPE=”Ethernet” UUID=[Removed] MASTER=bond0 SLAVE=yes USERCTL=no DEVICE=bond0 ONBOOT=yes BOOTPROTO=none USERCTL=no DEVICE=bond0.3 ONBOOT=yes BOOTPROTO=static IPADDR=192.168.10.22 NETMASK=255.255.255.0 USERCTL=no VLAN=yes
The problem comes when we try to set up a bridged network connection for the default vlan (vlan 1). For example we might try modifying bond0 and adding br0 as described here.
DEVICE=bond0 ONBOOT=yes BOOTPROTO=none USERCTL=no BRIDGE=br0 DEVICE=br0 TYPE=Bridge BOOTPROTO=dhcp ONBOOT=yes DELAY=0
However, br0 never obtains an IP over DHCP. We know it's not a DHCP issues since DHCP works fine if we set it up directly on bond0, but that's not a bridge interface so the VMs can't use it.
How should we configure the interfaces for both vlan 3 (storage) and default vlan for KVM guests and administration?