Why the interface of Mellanox card gets renamed to 'ethX-ethY' during boot ?

Solution Verified - Updated -

Issue

  • After system boot interface is seen with name as ethX-ethY in ifconfig output.
  • Below is the Mellanox card which shows this behaviour.
15:00.0 Ethernet controller: Mellanox Technologies MT26448 [ConnectX EN 10GigE, PCIe 2.0 5GT/s] (rev b0)
  • Below is the ifconfig output:
eth4-eth3 Link encap:Ethernet  HWaddr 90:E2:BA:XX:XX:XX  
          BROADCAST MULTICAST  MTU:1500  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:1000 
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
          Memory:97d00000-97d80000
  • Below is the log seen in dmesg:
Nov 12 18:13:46 HOSTNAME kernel: udev: renamed network interface eth4 to eth4-eth3

Environment

  • Red Hat Enterprise Linux 6.1
  • Mellanox NIC Cards.

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