Dell POWERCONNECT 5524 How to use

Dell™ PowerConnect™ 5524/5548/5524P/5548P
PowerConnect 5524/5548/5524P/5548P
Release Notes
Date: April 2014
System Firmware Version 4.1.0.16
Information in this document is subject to change without notice.
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System Firmware Version 4.1.0.16 Subject to Change Without Notice i
Table of Contents
Introduction 1
GLOBAL SUPPORT 1
Firmware Specifications 1
Functionality Changes 2
Issues Resolved 3
40G Molex break-out cable: E357317-S (uL) TYPE CL2 FT4 30 AWG, is not supported and cause port flapping...3
Some interfaces of a LAG across the stack do not update the LAG counters...........................................................3
DHCP Server Fatal Error crash.................................................................................................................................3
Device reboots with Fatal Error with message “SW3C_pcl_fft_entry_chk: illegal function input – vpt” .....................3
LAG with XG type present speed of 1,000 Mbps in GUI...........................................................................................3
Device does not present itself in the SSH server as support SSH-2.0-OpenSSH_5.9p1.RL ....................................3
Copy image from stack unit to master causes a system crash..................................................................................3
Show LLDP neighbors per interface cause crash .....................................................................................................3
Known Restrictions and Limitations 4
When 2 PoE capable switches are connected to each other, one of the 2 switches may consume power form the
neighboring switch and not from its internal power supply........................................................................................4
WEB GUI Page “Utilization Summary”, "Interface Utilization field" sometimes displays “-“.......................................4
USB key might hang after several quick inserts and removals requiring a reboot.....................................................4
Cisco Phones 7960 interoperability problem.............................................................Error! Bookmark not defined.
Documentation Updates 5
Adding clarification to Voice VLAN enable command................................................................................................5
Adding clarification to Voice VLAN Port Setting page...............................................................................................5
Clarification about interface switchport customer mode (QinQ) ................................................................................5
Issues Resolved in Previous Versions 5
Stacking unit does not always rejoin stack after master failover ...............................................................................5
HTTP login fail if password is longer than 20 characters...........................................................................................5
Wrong value used for chassis Service Tag...............................................................................................................5
STP frame size - STP frames had extra padding (frame size 68 instead of 64)........................................................6
When refreshing the Switching->VLAN->LAG interface->Edit page the device presents the “Port Interface” page
instead.......................................................................................................................................................................6
Deletion of all Static entries in DHCP Server page causes device to crash.............................................................6
When trying to add via Web GUI MAC ACE with broadcast MAC address as destination address, configuration is
not accepted and an error message is displayed “value is an illegal unicast MAC address”.....................................6
Summer time clock with SNTP..................................................................................................................................6
Show Tech Support (enhancement request).............................................................................................................6
PC5500 DVA randomly fails and assigns clients to the guest VLAN.........................................................................6
VLAN trunk mode Native VLAN with IPv6.................................................................................................................6
GUI problem in VLAN pages.....................................................................................................................................7
Voice VLAN and LAGs..............................................................................................................................................7
vulnerabilities and DoS attacks reported on SSH service .........................................................................................7

System Firmware Version 4.1.0.16 Subject to Change Without Notice ii
PowerConnect 55xxP having problem providing power when using Shortel IP230G phones (PSE/PTR issue -
213880).....................................................................................................................................................................7
PC55xx - speed not listed for 10Gb ports in Web GUI unless page was refreshed. .................................................7
PC55XX MIB OIDs for optical transceivers conversion from bBm to mWatt is mistaken..........................................7
Routed traffic in the device is using the port MAC as the SMAC instead of the device MAC....................................7
Web GUI displays tagged VLANs as Inactive configuration......................................................................................7
PCT55xx PS (main Power Supply) and RPS (Redundant PS) LED status is not reflected accurately in the Zoom
view of the Web GUI .................................................................................................................................................8
VCT results on short cables were shown as “Bad Value”..........................................................................................8
Guest-VLAN timeout command is not working..........................................................................................................8
Problem with IPv4 and IPv6 ACL’s combination .......................................................................................................8
Port flapping when connecting devices to each other with EEE enabled..................................................................8
Prevent creating duplicate ACEs per ACL.................................................................................................................8
The command "boot host dhcp" needs to stay in the configuration if without autosave option..................................8
Link issues between PC5548 and e6320 (Dell) laptop (EEE interoperability on Intel NIC)......................................9
PC55xx Port-channel inconsistent configuration in general mode ............................................................................9
PC55xx - FATAL ERROR and crash when changing port mode...............................................................................9
PC55xx v4.0.1.0 LAG issue using 10Gb interfaces...................................................................................................9
PC55xx Unable to reach Storm Control page via GUI (Japanese Internet Explorer)................................................9
55xx - Cannot modify port description in GUI on active fiber-optic interface.............................................................9
PC55xx - show clock detail output different to user manual....................................................................................10
Incorrect OID returned on SNMPGetNext 55xx.......................................................................................................10
PC55xx - SNMP ifType value of 6 for port-channel interfaces ...............................................................................10
GUI shows a fan led in red which does not match the physical status of the front led............................................10
PC55xx Connectivity issues with fixed port setting and stacking. ...........................................................................10
PC55xx switch crashed on snmpgetnext 1.3.6.1.4.1.89.59.2.3.1.9.2.2...................................................................10
PC55xx - unable to set speed 1000 via web GUI on ten gigabit interfaces.............................................................11
PC55xxP – Power to PDs lost every once in a while...............................................................................................11
Nessus vulnerability alert ........................................................................................................................................11
Fan level improvements..........................................................................................................................................11
PC 5524 SNMP walk improvements .......................................................................................................................11
EEE advertisement when EEE is disabled..............................................................................................................12
Devices stop to learn MAC addresses after 49.7 days............................................................................................12
Slave unit up time wraps after 49.7 days.................................................................................................................12
Fatal Error Loop - PC55xx stacking issues .............................................................................................................12
802.1X when spanning tree is enabled ...................................................................................................................12
POE LED might stay ON after Overload .................................................................................................................12
End of Release Notes 12

PowerConnect 5500 Series Release Notes
System Firmware Version 4.1.0.16 Subject to Change Without Notice Page 1
Introduction
This document provides specific information for the Dell PowerConnect 5524/5548/5524P/5548P Switch systems,
firmware version 4.1.0.16 (which is a maintenance release).
It is recommended that this release note be thoroughly reviewed prior to installing or upgrading this product.
GLOBAL SUPPORT
For information regarding the latest available firmware, recent release revisions or if requiring additional
assistance, please visit http://support.dell.com Support Web Site.
Firmware Specifications
Firmware Version Details
Boot PROM Name
Version No.
Release Date
powerconnect_55xx_boot-10014.rfb
1.0.0.14
Apr, 2012
Firmware Image Name
Version No.
Release Date
powerconnect_55xx-41016.ros 4.1.0.16 Apr, 2014
The firmware image version should be 4.1.0.16 on the PowerConnect 5500 Series. The boot prom image should be
1.0.0.14. Refer to the PowerConnect 5500 Series User‘s Guide for instructions on loading the boot PROM software
and updating the firmware image.
Version Numbering Convention
Version number
Description
55XX
4
1
0
16
Four part version number

Denotes the build number.

Denotes an ad hoc release of the product software.

Denotes a scheduled maintenance release of the product software.

Denotes a major version number.
Supported Firmware Functionality
For more details regarding the functionalities listed, please refer to the PowerConnect 5500 Series User‘s Guide.

PowerConnect 5500 Series Release Notes
System Firmware Version 4.1.0.16 Subject to Change Without Notice Page 2
Functionality Changes
From Version 4.1.0.15 and on – by default all show commands relevant to interfaces status/configuration will
display only present interfaces. Command will not display interfaces that are not currently present on the stack.
Note: display time may be a bit longer than in previous versions.
To display all interfaces – present and non-present, add the ‘detailed’ parameter to the show command.
From Version 4.1.0.15 and on – syslog messages will also include: device IP address; time zone and the 1/10 of
seconds value to message timestamp.
From Version 4.1.0.10 and on – OpenSSH version upgraded to 5.9; SSL version upgraded to 0.9.8r
From version 4.1.0.8 and on – Fast Link failover feature was improved. In case of a topology change from ring to
chain or chain to ring within the stack the traffic interruption is now as low as 9ms.
From version 4.1.0.5 support for PC55xx switches with a new PHY revision (A1) was added. PC55xx switches with
new PHY revision are identified as HW revision 03. The HW revision can be displayed by running the command
“show version” in the terminal window (console, Telnet or SSH). It is recommended to run firmware version 4.1.0.5
or later on PC55xx switches with new 03 HW revisions. PC55xx with new PHY revision can also run previous
firmware versions, but will be subject to certain limitations related to VCT, EEE and Green Ethernet functionality,
as detailed below:
Previous Firmware
Version
Limitation on PC55xx switches with new PHY revision
Firmware version 4.0.1.x
VCT may not provide accurate cable length. As a result Green Ethernet Feature may not
function as expected.
EEE is supported
Firmware version 4.1.0.x
VCT may not provide accurate cable length. As a result Green Ethernet Feature may not
function as expected.
EEE is fully supported

PowerConnect 5500 Series Release Notes
System Firmware Version 4.1.0.16 Subject to Change Without Notice Page 3
Issues Resolved
The following issues have been resolved in current firmware release (Version 4.1.0.16)
Description
User Impact
Resolution
Added support for 40G Molex
break-out cable
When using the mentioned cable, ports is
flapping and traffic cannot be forwarded
Issue resolved by adding
support
Some interfaces of a LAG across
the stack do not update the LAG
counters
Actual traffic is being forwarded, but counters
of some interfaces of LAG across the stack are
not updated.
Issue resolved
DHCP Server Fatal Error crash
When device function as DHCP server and
configuring the address pool (moving the
dynamic range, all connected hosts are
provided with static leases). After a while
device crash.
Issue resolved
Device reboots with Fatal Error
with message
“SW3C_pcl_fft_entry_chk: illegal
function input – vpt”
In some cases sending traffic denied by the
ACEs may cause reboot with the following
message: SW3C_pcl_fft_entry_chk: illegal
function input - vpt id 8
Issue resolved
LAG with XG type present speed
of 1,000 Mbps in GUI
User impact is cosmetic.
CLI output is presented as expected and traffic
across the stack runs as expected.
Issue resolved
Device does not present itself in
the SSH server as support SSH-
2.0-OpenSSH_5.9p1.RL
Device support SSH-2.0-OpenSSH_5.9p1.RL
but advertise itself as support old version:
SSH-2.0-OpenSSH_3.4p1.RL
Issue resolved
Copy image from stack unit to
master causes a system crash
When attempting to copy from a stack member
to the backup image on the master switch, the
stack will crash with a fatal error
Switch# copy unit://2/image image
Issue resolved - option is
not supported and has been
removed from CLI
command
Show LLDP neighbors per
interface cause crash
When device receive LLDP packet with vendor
specific VLAN ID 0, it cause the device to
crash when presenting the show LLDP
neighbors per interface
Issue resolved

PowerConnect 5500 Series Release Notes
System Firmware Version 4.1.0.16 Subject to Change Without Notice Page 4
Known Restrictions and Limitations
Summary
User Impact
Workaround
When 2 PoE capable
switches are connected to
each other, one of the 2
switches may consume
power form the neighboring
switch and not from its
internal power supply.
“Receiving” switch is not able to provide
PoE power to PD devices attached to it.
Disable PoE on the ports which connect
2 PoE enabled devices.
WEB GUI Page “Utilization
Summary”, "Interface
Utilization field" sometimes
displays “-“
When sending wire-speed traffic and the
refresh rate is longer than 15 seconds,
the WEB GUI displays “-“ instead of a
real value.
When sending wire-speed traffic, use
refresh rate of 15 seconds.
USB key might hang after
several quick inserts and
removals requiring a reboot.
After the USB key is inserted and
removed several times very quickly
(within a second) along with the "dir usb:"
command, the key stops responding.
The USB key becomes operational after
reboot.
Wait a few seconds between insertion
and removal of the USB key.
interoperability problem with
Cisco Phones 7960/ Inter-Tel
8560 IP Phones, Ruckus
7372 AP
Some of IP Phones create a short on
Ethernet wires when connected to
PC55xx POE ports. Connecting such
phone to PC55xxP might cause a
leakage of power to other POE devices
connected on the same switch. This may
cause POE issues on neighboring ports.
Two options are available to work
around this issue:
•Use a RJ45-Cat5 splitter cable
(2-to-1 RJ45 Splitter Cable
Adapter-F/M)
•Use a two pair Ethernet cable
(e.g. Cat3)
After device reboot, STP
Portfast shows status "No"
when interface is down
When port is in portfast status and in
down state, after reboot the port is
presented in show spanning-tree as not
supporting the portfast.
Once the interface moves to up state,
portfast functions as expected
When the interface is down, refer to
the running-configuration output
instead the show spanning –tree.

PowerConnect 5500 Series Release Notes
System Firmware Version 4.1.0.16 Subject to Change Without Notice Page 5
Documentation Updates
This document lists the changes from the PowerConnect 5524/5548/5524P/5548P Systems CLI and User’s Guide.
The modifications are due to instances discovered in various user environments.
Summary Description Relevant Documents
Adding clarification to Voice
VLAN enable command
Adding clarification to user guideline and CLI
example for command “voice vlan enable” –
Voice VLAN cannot be enabled on interface, if
interface is static member of the voice VLAN.
CLI guide
Adding clarification to Voice
VLAN Port Setting page
Adding clarification to Voice VLAN Port Setting
section (page 503) - – Voice VLAN cannot be
enabled on interface, if interface is static
member of the voice VLAN.
User Guide
Clarification about interface
switchport customer mode (QinQ)
Clarifying in “interface switchport mode”
command that customer mode setting is part
of QinQ tagging. CLI guide
Issues Resolved in Previous Versions
The following is a list of issues resolved between 4.1.0.12 and 4.1.0.15 in firmware release
Description
User Impact
Resolution
Stacking unit does not always
rejoin stack after master failover Traffic does not flow properly through some
units of the stack Issue resolved
HTTP login fail if password is
longer than 20 characters User is denied access management via http, in
such a case Issue resolved
The following is a list of issues resolved between 4.1.0.10 and 4.1.0.12 firmware release.
Description User Impact Resolution
Wrong value used for chassis
Service Tag
MIB – switch reports switch Service Tag as
Chassis Service tag. However – device is not
designed to be included in a chassis
Chassis Service Tag is now
set to NULL.

PowerConnect 5500 Series Release Notes
System Firmware Version 4.1.0.16 Subject to Change Without Notice Page 6
STP frame size - STP frames had
extra padding (frame size 68 instead
of 64)
STP frames with extra padding are valid from
standard point of view. However – some
systems reported errors when receiving such
frames.
Extra padding was removed
When refreshing the Switching-
>VLAN->LAG interface->Edit page
the device presents the “Port
Interface” page instead
GUI displays wrong page Issue resolved
Deletion of all Static entries in
DHCP Server page causes device to
crash System reboots Issue resolved
When trying to add via Web GUI
MAC ACE with broadcast MAC
address as destination address,
configuration is not accepted and
an error message is displayed
“value is an illegal unicast MAC
address”
user cannot configure via the web GUI a MAC
ACE with a broadcast as destination MAC
address Issue resolved
The following is a list of issues resolved between 4.1.0.08 and 4.1.0.10 firmware release.
Description
User Impact
Resolution
Summer time clock with SNTP Sometimes when working with SNTP server, the device clock adds 2 hours instead of 1
hour in Summer Time Issue resolved
Show Tech Support (enhancement
request) Request to add more info in “show tech- support” command
The following command
outputs was added to show
Tech-supp output:
"show interface counters
errors"
"show system unit X "
"show power inline"
PC5500 DVA randomly fails and
assigns clients to the guest VLAN Traffic from Dot1x users is not assigned to the correct VLAN Issue resolved
VLAN trunk mode Native VLAN with
IPv6
Device crashes when defining an IPv6 enabled
VLAN as a native VLAN on a port in trunk
mode Issue resolved

PowerConnect 5500 Series Release Notes
System Firmware Version 4.1.0.16 Subject to Change Without Notice Page 7
GUI problem in VLAN pages "apply" and "cancel" button disappear from VLAN
port setting edit page if interface includes
command to remove certain VLANs Issue resolved
Voice VLAN and LAGs Device crashes when Adding Voice VLAN
enabled ports to a LAG Issue resolved
vulnerabilities and DoS attacks
reported on SSH service Reports of SSH vulnerabilities on device Upgrade to OpenSSH
version 5.9
The following is a list of issues resolved between 4.1.0.05 and 4.1.0.08 firmware release.
Description
User Impact
Resolution
PowerConnect 55xxP having
problem providing power when using
Shortel IP230G phones (PSE/PTR
issue - 213880)
The Shortel IP230G phones don’t work.
Issue was related to phone
requesting/consuming power beyond the limit
of the class it was advertising
Additional global option was
added to allow switch to
provide power up to the
max limit of 15.4W
regardless of device POE
class.
PC55xx - speed not listed for 10Gb
ports in Web GUI unless page was
refreshed.
In Web GUI the current speed of the 10Gb
ports is not presented Issue resolved
PC55XX MIB OIDs for optical
transceivers conversion from bBm to
mWatt is mistaken
Wrong mWatt values are displayed in CLI and
Web GUI Issue resolved
Routed traffic in the device is using
the port MAC as the SMAC instead
of the device MAC
In some rare cases this behavior would affect
the ability of end stations to use the switch
interface as a default gateway.
Issue resolved. Device
base MAC is always used
as SMAC when routing
traffic
Web GUI displays tagged VLANs as
Inactive configuration Wrong configuration is being shown to the user. CLI displays accurate information. Issue resolved

PowerConnect 5500 Series Release Notes
System Firmware Version 4.1.0.16 Subject to Change Without Notice Page 8
PCT55xx PS (main Power Supply)
and RPS (Redundant PS) LED
status is not reflected accurately in
the Zoom view of the Web GUI
PS LED was always on even if PS was not
connected to power. RPS LED was always off,
even if RPS was connected. GUI did not
provide accurate indication if PS and/or RPS
are functioning properly.
Issue resolved
VCT results on short cables were
shown as “Bad Value”
When using HW revision 02 (with PHY revision
A0), VCT results of short cables (below 30 m)
were shown as “Bad Value” Issue resolved
The following is a list of issues resolved between 4.1.0.01 and 4.1.0.05 firmware release.
Description
User Impact
Resolution
Guest-VLAN timeout command is
not working
Workstations connected to 802.1x-enabled
ports prematurely receive a dynamic IP
address from Guest VLAN DHCP server and
not from DHCP server on required data VLAN
DHCP server
Issue resolved
Problem with IPv4 and IPv6 ACL’s
combination
When using both IPv4 and IPv6 ACLs on
multiple ports, the ACL did not function
properly on some of the ports Issue resolved
Port flapping when connecting
devices to each other with EEE
enabled
When connecting a link between 2 devices
with EEE-enabled link may flap (down then up)
around once a day
PC55xx switches with a
new PHY revision resolves
this issue
The following is a list of issues resolved between 4.0.1.12 and 4.1.0.01 firmware release.
Description
User Impact
Resolution
Prevent creating duplicate ACEs
per ACL
Every time the users applies the profile-global
macro with the "macro global apply profile-
global" command, a new duplicate entry is
added to each of the ACLs
Delete redundant ACL
The command "boot host dhcp"
needs to stay in the configuration
if without autosave option.
The "boot host dhcp" command which initiates
the auto configuration feature should not be
removed from the running-config or startup-
config (which terminates auto configuration
retries) unless the customer has selected the
auto-save option which indicates that he wants
the new config saved and therefore does not
want to retry the configuration download
Auto Update Phase 2
implementation

PowerConnect 5500 Series Release Notes
System Firmware Version 4.1.0.16 Subject to Change Without Notice Page 9
Link issues between PC5548 and
e6320 (Dell) laptop (EEE
interoperability on Intel NIC) Link cannot be established
When EEE is disabled –
Switch does not advertise
EEE capability.
When EEE is enabled –
user can determine if to
work in Auto-Negotiation
slave mode to overcome
the problem
PC55xx Port-channel inconsistent
configuration in general mode
1. Whenever port is in general mode and bind
to VLAN, an error message is present when
trying to remove the port from the VLAN
2. When creating a range of VLANs, specific
VLAN 3664 cannot be created.
Whenever trying to create this specific VLAN
3664 after the failure, it still cannot be created.
1. Removed the error
message
2. All VLANs in any range
or combination is being
created.
PC55xx - FATAL ERROR and
crash when changing port mode. When changing the port mode to access or
general, the switch crashed Fixed the problem
PC55xx v4.0.1.0 LAG issue using
10Gb interfaces
When using the XG ports with SFP of 1G, can
join both ports as uplink LAG Po1.
- If reloading the device, XG port 1/0/2 cannot
come up.
- If replacing one of the 1G SFP with 10G SFP
+, the device will allow such an illegal behavior
Port-Channel speed is
based on the physical ports
speed that are members of
the Port-Channel
PC55xx Unable to reach Storm
Control page via GUI (Japanese
Internet Explorer)
When IE is in Japanese – Strom Control page
is missing
Fixed the problem and
verified that other web
pages doesn’t suffer from
the same problem
55xx - Cannot modify port
description in GUI on active fiber-
optic interface
Cannot modify port description in GUI on
active fiber-optic interface Fixed the problem

PowerConnect 5500 Series Release Notes
System Firmware Version 4.1.0.16 Subject to Change Without Notice Page 10
PC55xx - show clock detail output
different to user manual Show clock in the device showed Summer
time range in dates instead of words Fixed the code to match the User Guide
Incorrect OID returned on
SNMPGetNext 55xx
When using the SNMP GetNext on
1.3.6.1.2.1.2.2.1.1.1.9999 the incorrect OID is
returned Fixed the problem
PC55xx - SNMP ifType value of 6
for port-channel interfaces ifType for Post-Channels is the same as for
regular interfaces
Updated the MIB
information to comply
newer iANAifType definition
GUI shows a fan led in red which
does not match the physical
status of the front led
Once the switch temperature goes below 40
degrees, the GUI shows a fan led in red which
does not match the physical status of the front
led
GUI now shows the right
status of the LED
PC55xx Connectivity issues with
fixed port setting and stacking.
Use 2 PC55xx switches as stack and with
fixed port setting 100 Full. for example 1/0/1
and 2/0/1
After remove/power of the master unit, the
fixed port (gi2/0/1) did not do a linkup, but the
LED is on.
Fixed the problem
PC55xx switch crashed on
snmpgetnext
1.3.6.1.4.1.89.59.2.3.1.9.2.2
Device crashed when using snmpgetnext of
1.3.6.1.4.1.89.59.2.3.1.9.2.2
Fixed the problem

PowerConnect 5500 Series Release Notes
System Firmware Version 4.1.0.16 Subject to Change Without Notice Page 11
PC55xx - unable to set speed
1000 via web GUI on ten gigabit
interfaces
User cannot set TE port speed to 100 via
EWS. This can be done only VIA CLI
WEB GUI fixed
PC55xxP – Power to PDs lost
every once in a while
every once in a while port flapping would
occur, in some cases when a large number of
POE edge equipment is connected to device,
and in addition there are some non-POE
equipment connected as well
Fixed the problem
The following is a list of issues resolved between 4.0.1.11 and 4.0.1.12 firmware release.
Description User Impact Resolution
Nessus vulnerability alert
Nessus scan on device discovers a false
xss scripting vulnerability (CVE-2002-
1060, CVE-2003-1543, CVE-2005-2453,
CVE-2006-1681)
Removed the false vulnerability
report by ignoring the script name
in the scan and returning error on
the page
Fan level improvements
1. Hysteresis values was not accurate –
Fans went On and Off in high rate
2. When the Software turns off the fan
due to low temperature - there is a
syslog message in warning level
3. Show system showed the Fan as not-
operational when the Software turned off
the Fan
1. Updated new Hysteresis
values
Below 40° Celsius – Fan is Off
Above 50° Celsius – Fan is On
2. Changing the level of the
syslog to informational in case
the fans are turned off by
software due to low temperature.
3. Software now distinguishes
between the state of a failure
FAN and a Fan that is not
working due to software decision.
These are the status displayed
for each situation:
IDLE – Fan was turned off by
software state due to low
temperature
ON – Fan is operational due to
high temperature
FAILURE – Fan not functioning
due to a problem
PC 5524 SNMP walk
improvements
When performing an SNMP walk – the
device would return MIB information for
all interfaces of the stack (even those
that are in non-present state ) – SNMP
walk performance was low
SNMP walk on ifTable and
swIfTable MIBs will walk only
existing interfaces in the stack

PowerConnect 5500 Series Release Notes
System Firmware Version 4.1.0.16 Subject to Change Without Notice Page 12
The following is a list of issues resolved between 4.0.1.0 and 4.0.1.11 firmware release.
Description User Impact Resolution
EEE advertisement when EEE is
disabled
When EEE is disabled, the Auto-
negotiation advertises EEE capability of
the port. In case the link partner is EEE
enabled, but does not fully comply to
EEE standard, the auto-negotiation
process might fail causing the link to be
down.
When EEE is disabled, the auto-
negotiation process does not
advertise EEE capability.
Note that changing EEE state
(globally or on individual
interface) will cause link to toggle,
since auto negotiation
advertisement is being changed.
Devices stop to learn MAC
addresses after 49.7 days
After 49.7 days of operation, the device
stops re-learning MAC addresses. These
MACs which were previously learned will
not appear in MAC address table. As a
result traffic streams sent to previously
learned MAC addresses are treated as
unknown-unicast traffic and flooded
within the VLAN.
MAC address learning
mechanism was fixed so that
both learning new addresses and
re-learning existing addresses
are updating the MAC Address
database.
Slave unit up time wraps after
49.7 days
Slave unit sysUpTime (which can be
displayed in show system command in
CLI) wraps up after 49.7 days instead of
wrapping up after 497.1 days. As a
result, after operating for 49.7 days,
slave units (including backup master) will
begin re-counting sysUpTime from 0. No
actual reboot occurred
sysUpTime on slave unit is
calculated correctly and will wrap
up only after 497.1 days.
Fatal Error Loop - PC55xx
stacking issues
If 2 devices (when at least one of them
is a 24 port unit) with sequential MAC
are placed in the same stack – the stack
enters an endless reboot sequence and
does not converge
MAC addresses assignments for
device ports are calculated based
on absolute port number and not
on internal number.
The following issues have been resolved in firmware 4.0.1.0 release
Description User Impact Resolution
802.1X when spanning tree is
enabled
When spanning-tree is enabled on a
port, and portfast is disabled, the dot1x
authentication does not take place after
initial reload. This happens only with
Windows Vista workstations.
In the implementation of 802.1x,
software timers were modified to
better support Windows Vista
workstations.
POE LED might stay ON after
Overload
When connected POE devices overload
the ports, the amber POE LED is lit as
expected. In some cases, after the
overload condition is removed, the
amber POE LED on ports will stay lit until
a short polling cycle is complete. This is
a cosmetic issue, even when the amber
POE LED is lit, the device operates
correctly (e.g. the output of the CLI
command "show power inline
consumption" displays the actual
information).
The POE LED status is cleared
after overload issue is resolved.
End of Release Notes