Issued:
2012-06-20
Updated:
2012-06-20

RHBA-2012:0901 - lldpad bug fix and enhancement update

Synopsis

lldpad bug fix and enhancement update

Type/Severity

Bug Fix Advisory (none)

Topic

Updated lldpad packages that fix various bugs and provide an enhancement are now available for Red Hat Enterprise Linux 6.

Description

The lldpad package provides the Link Layer Discovery Protocol (LLDP) Linux user space daemon and associated configuration tools. It supports Intel's Link Layer Discovery Protocol (LLDP) and provides Enhanced Ethernet support.

These updated lldpad packages includes fixes for the following bugs:

  • The lldpad tool is initially invoked by initrd during the boot process to support Fibre Channel over Ethernet (FCoE) boot from a Storage Area Network (SAN). The runtime lldpad initscript did not kill lldpad before restarting it after system boot. Consequently, lldpad could not be started normally after system boot. In this update, lldpad init now contains the "-k" option to terminate the first instance of lldpad that was started during system boot. (BZ#768555)

  • When the Data Center Bridging Exchange (DCBX) IEEE mode fails, it falls back to Converged Enhanced Ethernet (CEE) mode and Data Center Bridging (DCB) is enabled as part of the ifup routine. Normally, this does not occur unless either a CEE-DCBX Type-Length-Value (TLV) is received or the user explicitly enables this mode. However, in kernels released earlier than 2.6.38, DCBX IEEE mode is not supported and IEEE falls back to CEE mode immediately. Consequently, DCB was enabled in CEE mode on some kernels when IEEE mode failed, even though a peer TLV had not yet been received and the user did not manually enable it. This update fixes the logic by only enabling and advertising DCBX TLVs when a peer TLV is received. As a result, lldpad DCBX works as expected; IEEE mode is the default and CEE mode is used only if a peer CEE-DCBX TLV is received or the user enables it through the command line. (BZ#803482)

  • A user may use dcbtool commands to clear the advertise bits on CEE-DCBX feature attributes (such as PFC, PG, APP). However, the user settings were lost during ifdown and ifup sequences and the default values were restored. This update fixes the problem so that the values are only set to defaults if the user has not explicitly enabled them. (BZ#811422)

In addition, these updated lldpad packages provide the following enhancement:

  • When a switch disassociated a connection for a virtual machine (VM) running on a host and the VM was configured to use 802.1Qbg, then libvirt was not informed and the VM connectivity was lost. Libvirt has support for restarting a VM, but it relies on the LLDP Agent Daemon to forward the Virtual Switch Interface (VSI) information. This update enables forwarding of the switch-originated VSI message to libvirt. (BZ#812202)

All users of lldpad are advised to upgrade to this updated package, which fixes these bugs and adds this enhancement.

Solution

Before applying this update, make sure all previously-released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/knowledge/articles/11258

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Power, big endian6ppc64
Red Hat Enterprise Linux for IBM z Systems6s390x
Red Hat Enterprise Linux Workstation6x86_64
Red Hat Enterprise Linux Workstation6i386
Red Hat Enterprise Linux Server6x86_64
Red Hat Enterprise Linux Server6i386
Red Hat Enterprise Linux Server from RHUI6x86_64
Red Hat Enterprise Linux Server from RHUI6i386
Red Hat Enterprise Linux Server - Retired Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6x86_64
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension6i386
Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems)6s390x
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems)6s390x
Red Hat Enterprise Linux Desktop6x86_64
Red Hat Enterprise Linux Desktop6i386

Updated Packages

  • lldpad-debuginfo-0.9.43-18.el6.ppc.rpm
  • lldpad-devel-0.9.43-18.el6.s390.rpm
  • lldpad-debuginfo-0.9.43-18.el6.i686.rpm
  • lldpad-0.9.43-18.el6.s390x.rpm
  • lldpad-devel-0.9.43-18.el6.s390x.rpm
  • lldpad-devel-0.9.43-18.el6.i686.rpm
  • lldpad-debuginfo-0.9.43-18.el6.s390.rpm
  • lldpad-0.9.43-18.el6.src.rpm
  • lldpad-0.9.43-18.el6.ppc64.rpm
  • lldpad-devel-0.9.43-18.el6.ppc64.rpm
  • lldpad-0.9.43-18.el6.x86_64.rpm
  • lldpad-0.9.43-18.el6.i686.rpm
  • lldpad-debuginfo-0.9.43-18.el6.ppc64.rpm
  • lldpad-devel-0.9.43-18.el6.ppc.rpm
  • lldpad-debuginfo-0.9.43-18.el6.x86_64.rpm
  • lldpad-devel-0.9.43-18.el6.x86_64.rpm
  • lldpad-debuginfo-0.9.43-18.el6.s390x.rpm

Fixes

CVEs

(none)

References

(none)

Additional information