ifconfig shows wrong MAC for ib0

Infiniband hardware address can be incorrect! Please read BUGS section in ifconfig(8).
infiniband A0:00:03:00:FE:80:00:00:00:00:00:00:00:00:00:00:00:00:00:00  txqueuelen 1024  (InfiniBand)

# man ifconfig

BUGS

       Ifconfig  uses  the  ioctl  access method to get the full address information, which limits hardware addresses to 8 bytes.  Because Infiniband hardware address has 20

       bytes, only the first 8 bytes are displayed correctly.  Please use ip link command from iproute2 package to display link layer  informations  including  the  hardware address

즉, Infiniband hardware address는 20 bytes로 ifconfig 명령으로 표기할 수 없습니다. ifconfig 명령어가 아닌 iproute 패키지의 ip 명령어를 사용하거나 패치를 하면 된다.

※ 1Gb Ethernet의 Mac address는 6Bytes로 구성되어 있음
※ Infiniband는 20Bytes로 구성되어 있는데 8Bytes 이하 00으로 표시 됨!!

ex) ifconfig ib1
A0:00:03:00:FE:80:00:00:00:00:00:00:00:00:00:00:00:00:00:00

ex) ip a show ib1
a0:00:03:00:fe:80:00:00:00:00:00:00:00:02:c9:03:00:a2:fb:32

CONTROLLING IPOIB MODE(DATAGRAM MODE, CONNECTED MODE)

datagram mode

2KB IB MTU: 2044 bytes.(maximum)

4KB IB MTU: 4092 bytes.(maximum)

connected mode

65520 bytes.(maximum)

Controlling IPoIB mode

# cat /sys/class/net/ib0/mode

datagram

# cd /etc/sysconfig/network-scripts

# ./ifdown ib0

# echo connected > /sys/class/net/ib0/mode

# ./ifup ib0

# cat /sys/class/net/ib0/mode

connected

# vi /etc/infiniband/openib.conf

#SET_IPOIB_CM=auto

SET_IPOIB_CM=yes

IPOIB_MTU=65520

※ connected mode = no
# sed -i 's/SET_IPOIB_CM=auto/SET_IPOIB_CM=no/g' /etc/infiniband/openib.conf