User Manual

Rev 2.2-1.0.1

Mellanox Technologies

Using the example of Step 2:

host1$ ifconfig ib0.8001

ib0.8001 Link encap:UNSPEC HWaddr 80-00-00-4A-FE-80-00-00-00-00-00-00-00-00-00-00

BROADCAST MULTICAST MTU:2044 Metric:1

RX packets:0 errors:0 dropped:0 overruns:0 frame:0

TX packets:0 errors:0 dropped:0 overruns:0 carrier:0

collisions:0 txqueuelen:128

RX bytes:0 (0.0 b) TX bytes:0 (0.0 b)

Step 4. As can be seen, the interface does not have IP or network addresses. To configure those, you

should follow the manual configuration procedure described in Section 4.4.3.3.

Step 5. To be able to use this interface, a configuration of the Subnet Manager is needed so that the

PKey chosen, which defines a broadcast address, be recognized (see Chapter 8, “OpenSM –

Subnet Manager”).

4.4.4.2 Removing a Subinterface

To remove a child interface (subinterface), run:

echo <subinterface PKey> /sys/class/net/<ib_interface>/delete_child

Using the example of Step 2:

echo 0x8001 > /sys/class/net/ib0/delete_child

Note that when deleting the interface you must use the PKey value with the most significant bit

set (e.g., 0x8000 in the example above).

4.4.5 Verifying IPoIB Functionality

To verify your configuration and your IPoIB functionality, perform the following steps:

Step 1. Verify the IPoIB functionality by using the ifconfig command.

The following example shows how two IB nodes are used to verify IPoIB functionality. In

the following example, IB node 1 is at 1

1.4.3.175, and IB node 2 is at 11.4.3.176:

host1# ifconfig ib0 11.4.3.175 netmask 255.255.0.0

host2# ifconfig ib0 11.4.3.176 netmask 255.255.0.0

Step 2. Enter the ping command from 11.4.3.175 to 11.4.3.176.

The following example shows how to enter the ping command:

host1# ping -c 5 11.4.3.176

PING 11.4.3.176 (11.4.3.176) 56(84) bytes of data.

64 bytes from 11.4.3.176: icmp_seq=0 ttl=64 time=0.079 ms

64 bytes from 11.4.3.176: icmp_seq=1 ttl=64 time=0.044 ms

64 bytes from 11.4.3.176: icmp_seq=2 ttl=64 time=0.055 ms

64 bytes from 11.4.3.176: icmp_seq=3 ttl=64 time=0.049 ms

64 bytes from 11.4.3.176: icmp_seq=4 ttl=64 time=0.065 ms

--- 11.4.3.176 ping statistics ---

5 packets transmitted, 5 received, 0% packet loss, time 3999ms rtt min/avg/max/mdev =

0.044/0.058/0.079/0.014 ms, pipe 2