An old host name of a Red Hat Enterprise Linux is sent to an FC switch via FDMI.

Solution Verified - Updated -

Issue

  • When reviewing the list of hosts connected to an FC switch with a command similar to "fdmishow", an old hostname appears for some Red Hat Enterprise Linux hosts (instead of the one currently set in /etc/hostname or via hostnamectl)
  • After changing the hostname of a server from hostname-old to hostname-new, the FDMI hostname of HBA driver is not getting updated. SAN Switches is still show hostname-old.
  • FDMI data displays localhost instead of actual hostname

Environment

  • Red Hat Enterprise Linux (RHEL) 7
  • Red Hat CoreOS (RHCOS) based on Red Hat Enterprise Linux 9
  • QLogic/Marvell HBAs using the qla2xxx driver
  • The same issue can theoretically appear with:
    • other HBA models
    • other RHEL or RHCOS versions
  • Red Hat Enterprise Linux 6 with the hostname boot parameter (non default setup)

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