RHBA-2013:0414 - Bug Fix Advisory

Topic

Updated lldpad packages that fix multiple bugs and add various enhancements are
now available for Red Hat Enterprise Linux 6.

Description

The lldpad packages provide the Linux user space daemon and configuration tool
for Intel's Link Layer Discovery Protocol (LLDP) agent with Enhanced Ethernet
support.

The lldpad packages have been upgraded to upstream version 0.9.45, which
provides a number of bug fixes and enhancements over the previous version. In
particular, a new subpackage, lldpad-libs, has been introduced. It contains the
liblldp_clif shared library which provides an easy way for applications to talk
to the LLDPAD daemon (lldpad). (BZ#819938)

This update fixes the following bugs:

• Previously, LLDPAD did not listen to multicast MAC addresses. Consequently, it

could not gather information from locally connected bridges and lldptool
displayed the wrong information. A patch has been applied to enable monitoring
of broadcast MAC addresses and users can now display the correct information
about locally connected bridges. (BZ#818598)

• Previously, dcbtool commands could, under certain circumstances, fail to

enable the Fibre Channel over Ethernet (FCoE) application type-length-values
(TLV) for a selected interface during the installation process. Consequently,
various important features might have not been enabled (for example priority
flow control, or PFC) by the Data Center Bridging Exchange (DCBX) peer. To
prevent such problems, application-specific parameters (such as the FCoE
application TLV) in DCBX are now enabled by default. (BZ#824188)

• Previously, an error in the DCBX (Data Center Bridging Exchange) version

selection logic could cause LLDPDUs (Link Layer Discovery Protocol Data Units)
to be not encoded in the TLV (Type-Length Value) format during the transition
from IEEE DCBX to the legacy DCBX mode. Consequently, link flaps, a delay, or a
failure in synchronizing up DCBX between the host and a peer device could occur.
In the case of booting from a remote FCoE (Fibre-Channel Over Ethernet) LUN
(Logical Unit Number), this bug could result in a failure to boot. This update
fixes the bug and TLV is now always used in the described scenario. (BZ#829857)

• When none of the user priority attributes were PFC (Priority-based Flow

Control) enabled, attempting to query the currently configured LocalAdminParam
values for the "enabled" parameter produced the message "End of LLDPDU TLV". An
upstream patch has been applied and now the lldptool utility returns "none" as
expected in the scenario described. (BZ#870576)

• Previously, when a peer removed a TLV (ETS, PFC, or APP) the 802.1Qaz module

did not update the local MIB. Consequently, this resulted in the old peer data
persisting even though it was no longer in the received PDU. This update
resolves the problem by clearing the local MIB even in the case of a NULL PTR
indicating that no MIB was received. As a result, the operational status for PFC
reverts to the localAdminParams settings as expected in the scenario described.
(BZ#870578)

This update also adds the following enhancement:

• This update adds support for the IEEE 802.1Qbg standard over bonded

interfaces. Users can now take full advantage of 802.1Qbg capabilities.
(BZ#738897)

All users of lldpad are advised to upgrade to these updated packages, which fix
these bugs and add these enhancements.

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

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

• BZ - 869633 - update brings 32bit binary package into 64bit channel

CVEs

(none)

References

(none)