User Manual

Rev 2.0-3.0.0

Mellanox Technologies

Figure 3: An Example of a Virtual Network

The example above shows a few IPoIB instances that server the virtual interfaces at the Virtual

Machines.

To display the services provided to the Virtual Machine interfaces:

Example:

In the example above the ib0.2 IPoIB interface serves the MAC 52:54:00:60:55:88 with no

VLAN tag for that interface.

4.8.3 VLAN Configuration Over an eIPoIB Interface

eIPoIB driver supports VLAN Switch Tagging (VST) mode, which enables the virtual machine

interface to have no VLAN tag over it, thus allowing VLAN tagging to be handled by the Hyper-

visor.

 To attach a Virtual Machine interface to a specific isolated tag:

Step 1. Verify the VLAN tag to be used has the same pkey value that is already configured on that ib

port.

Step 2. Create a VLAN interface in the Hypervisor, over the eIPoIB interface.

Step 3. Attach the new VLAN interface to the same bridge that the virtual machine interface is already

attached to.

For example, to create the VLAN tag 3 with pkey 0x8003 over that port in the eIPoIB interface

eth4, run:

# cat /sys/class/net/eth0/eth/vifs

SLAVE=ib0.2 MAC=52:54:00:60:55:88 VLAN=N/A

# cat /sys/class/infiniband/mlx4_0/ports/<ib port>/pkeys/*

# vconfig add <eIPoIB interface> <vlan tag>

# brctl addif <br-name> <interface-name>

#vconfig add eth4 3

#brctl addif br2 eth4.3

IPoIB LAN

(via port #1)

Host

ib0.2

ib0.3

eth0

tap0

tap1

KVM GUEST1

vif0.2

KVM GUEST2

vif0.3br0