HP NJ2000 User manual

3Com Corporation
3Com Network Jack
NJ2000
User Guidance
Tom Kinahan
3/12/2009

3Com Network Jack NJ2000
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Copyright © 2009 3Com Corporation. All Rights Reserved.
Contents
Contents........................................................................................................................................................ 2
Introduction ..................................................................................................................................................3
System Information ...................................................................................................................................... 4
System Identity....................................................................................................................................5
Address Information........................................................................................................................... 5
Port Information................................................................................................................................. 5
Trunk Information..............................................................................................................................6
VLAN Information .............................................................................................................................6
Port Statistics ................................................................................................................................................7
System Name ................................................................................................................................................9
IP Address ...................................................................................................................................................10
Password Settings .......................................................................................................................................11
Tools............................................................................................................................................................ 12
Port Configuration ......................................................................................................................................14
Speed/Duplex.....................................................................................................................................15
Flow Control......................................................................................................................................15
Storm Control.............................................................................................................................................. 16
Port Mirroring .............................................................................................................................................17
Port to Mirror to...............................................................................................................................18
Ports to Mirror..................................................................................................................................18
Cable Diagnostics ........................................................................................................................................19
Trunk Membership .....................................................................................................................................20
Working with Trunks.......................................................................................................................21
Trunk Setting...............................................................................................................................................22
LACP Setting................................................................................................................................................23
LACP Status Overview .................................................................................................................................24
Aggregation Information.................................................................................................................. 25
LACP Port Status ............................................................................................................................. 25

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802.1Q VLAN Membership .........................................................................................................................26
Introduction to VLANs.....................................................................................................................27
VLAN IDs..........................................................................................................................................27
PVID...................................................................................................................................................27
Packet Type .......................................................................................................................................28
802.1Q VLAN Group.................................................................................................................................... 29
802.1Q Per Port Configuration ...................................................................................................................30
802.1x Settings............................................................................................................................................31
802.1x Settings................................................................................................................................... 32
802.1x Statistics .......................................................................................................................................... 33
LLDP Configuration......................................................................................................................................34
LLDP..................................................................................................................................................34
LLDP Neighbor Table...................................................................................................................................35
RSTP Setting ................................................................................................................................................36
RSTP status.................................................................................................................................................. 38
QOS Configuration ......................................................................................................................................39
802.1p.................................................................................................................................................40
DSCP..................................................................................................................................................40
SNMP Configuration ................................................................................................................................... 41
PoE (Power over Ethernet) Settings............................................................................................................42
Troubleshooting..........................................................................................................................................44
Introduction
There is no separate User Guide manual for the NJ2000. The NJ2000 Web interface includes context
relevant help on the administration Web pages.
Where you wish to consult this help without connecting to the Switch administration the help text is
captured in this document.

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System Information
This page provides an overview of the configuration of the switch. There are five different tables on
this page:
System Identity - Displays general information about the switch.
Address Information - Displays the IP Address configuration of the switch.
Port Information - Displays the configuration of every port on the switch.
Trunk Information - Displays membership information for all trunks.
VLAN Information - Displays the membership information for all VLANs.
Note: This page displays an overview of the switch configuration. To change the switch
configuration, use the Web Management-Interface pages referenced on this page.
There are two main buttons associated with this page:
HELP - Displays this window.
REFRESH - Refreshes the page with the current switch configuration and status
information.

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System Identity
This section contains general information about the switch. System Name, System Location, and
System Contact are set in the SYSTEM > Name page. The Software Version changes when a new
version of software is updated on the switch from the SYSTEM> Tools page. The Number of
Ports, Hardware Version, and Serial Number values are created when the switch is manufactured
and cannot be changed.
Address Information
IP Address, Subnet Mask and Gateway IP Address are set from the SYSTEM > IP Address
page. Management VLAN and MAC Address are fixed during manufacture and are provided here
for information.
Port Information
This table contains one row for each port on the switch. Each row is divided into eight columns as
follows:
Port - The front-panel port number.
Type - All ports on this switch are 10/100/1000BASE-T.
Link Status - Up indicates that the port is connected to another device. Down indicates
there is no connection. The front-panel "image" that is always visible at the top of the page,
also displays this information.
Speed/Duplex Status - An indication of the speed and duplex setting of the port. This is a
number, the speed in Mbps, followed by either FDX for full-duplex or HDX for half-
duplex. This can be changed on the PORTS > Configuration page.
Flow Control Status - Enabled indicates that Flow Control has been enabled on the
PORTS > Configuration page.
Auto-negotiation - Auto-negotiation is Enabled by default and is only Disabled when a
Speed/Duplex setting other than Auto is selected on the PORTS > Configuration page.
Frame Type - Tagged means that the port will only send and receive VLAN-tagged
frames. When set to All the port will also send and receive untagged packets. See VLANS
> Port Config for more information.
PVID - The Port VLAN ID. When Frame Type is set to All, untagged packets arriving on
the port will be associated with this VLAN. See VLANS > Port Config for more
information.

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Trunk Information
This table will be empty if no trunks have been configured from the TRUNKS > Membership
page. The table has four columns as follows:
Trunk - The Trunk Label. T1 through T4 may appear in this column.
Type - All trunks and ports on this switch are 10/100/1000M
Trunk Status - An indication of the speed and duplex setting of the trunk. This is a
number, the speed in Mbps, followed by either Full for full-duplex or Half for half-duplex.
This can be changed on the TRUNKS > Settings page.
Ports - The ports that are members of the trunk.
VLAN Information
VLANs can be added on the VLANS > VLAN Setup page. The two columns in this table are used
as follows:
VLAN ID - A number in the range 1 - 4094 which identifies the VLAN.
VLAN Members - A list of the ports that are members of the VLAN. By default, all ports
are members of VLAN 1.

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Port Statistics
You can display statistics on network traffic from the ports. These statistics can be used to identify potential
problems with the switch (such as a faulty port or unusually heavy loading). All values displayed have been
accumulated since the last system reboot, but can be reset to zero by clicking the CLEAR button. The current
statistics are not displayed until you click the REFRESH button.
Parameter
Description
Interface Statistics
Received Octets
The total number of octets received on the interface, including framing
characters.
Received Unicast Packets
The number of subnetwork-unicast packets delivered to a higher-layer
protocol.
Received Errors
The number of inbound packets that contained errors preventing them
from being deliverable to a higher-layer protocol.
Transmitted Multicast
Packets
The total number of packets that higher-level protocols
requested be transmitted, and which were addressed to a multicast
address at this sub-layer, including those that were discarded or not sent.
Transmitted Broadcast
Packets
The total number of packets that higher-level protocols
requested be transmitted, and which were addressed to a broadcast
address at this sub-layer, including those that were discarded or not sent.
Received High Priority
Packets
The total number of received packets that set as High Priority in the QoS
settings.
Transmitted High Priority
Packets
The total number of transmitted packets that set as High Priority in the
QoS settings.
Received Multicast Packets
The number of packets, delivered by this sub-layer to a higher (sub-)layer,
which were addressed to a multicast address at this sub-layer.

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Received Broadcast
Packets
The number of packets, delivered by this sub-layer to a higher (sub-)layer,
which were addressed to a broadcast address at this sub-layer.
Transmitted Octets
The total number of octets transmitted out of the interface, including
framing characters.
Transmitted Unicast
Packets
The total number of packets that higher-level protocols
requested be transmitted to a subnetwork-unicast address, including
those that were discarded or not sent.
Transmitted Errors
The number of outbound packets that could not be transmitted because of
errors.
Received Normal Priority
Packets
The total number of received packets that set as High Priority in the QoS
settings.
Transmitted Normal Priority
Packets
The total number of transmitted packets that set as High Priority in the
QoS settings.
There are two main buttons associated with this page:
REFRESH - Resends the information.
CLEAR - Clears all counters and sets them back to zero.

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System Name
This page allows you to change the System Name, System Location, and System Contact. The System Name is
displayed on the Login page, and the SYSTEM > Information page.
System Name - The name of the switch. The System Name can be up to 24 characters long.
System Location - Description of the switch location. The System Location can be up to 24 characters
long.
System Contact - The contact name for the switch. The System Contact can be up to 24 characters long.
Note: The System Name, System Location, and System Contact will accept all characters on the keyboard (i.e.:
numbers, upper-case and lower-case letters, and keyboard symbols).
There are three main buttons associated with this page:
HELP - Displays this window.
APPLY - Updates the switch configuration. No changes are made to the configuration until this
button is pressed.
CANCEL - All changes made to the page are discarded and the switch configuration remains
unchanged.

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I
IP Address
This page allows you to change the IP Address used by the switch.
DHCP Enabled - If enabled, the IP Address will be assigned from the DHCP server. If disabled, the IP
Address must be assigned manually.
Switch IP Address - The dot-separated IPv4 address used by the switch.
Subnet Mask - The dot-separated IPv4 Subnet address used by the switch. If in doubt, set this to be the
same as the Subnet Mask used by your PC.
Gateway IP Address - The dot-separated IPv4 Gateway address used by the switch. If in doubt, set this to
be the same as the Default Gateway address used by your PC.
Note: If DHCP is enabled, the word "Fallback" will be added to the front of the other parameter names to indicate
the usage of a manually assigned IP Address.
Note: If you change the IP address used by the switch you will lose contact with this Web Management-Interface
and may have to change the IP address on your PC to reconnect.
Note: It is extremely important that you do not forget the IP Address of the switch. If you forget the IP Address you
will have to manually reset the switch to its factory defaults. See the Troubleshooting page for more details. Power
cycle will not reset the IP Address.
There are three main buttons associated with this page:
HELP - Displays this window.
APPLY - Updates the switch configuration. No changes are made to the configuration until this button is
pressed.
CANCEL - All changes made to the page are discarded and the switch configuration remains unchanged

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Password Settings
This page allows you to change the password that is required to access this Web
Management-Interface. You will need to enter the following:
Current Password - The password that you used to login to this interface. There is
no default password.
New Password - Your new password, up to 16 characters long. Passwords are
case-sensitive.
Confirm Password - Re-enter the new password to ensure it has been entered
correctly.
Note: Can be up to 16 characters long and can consist of any alphanumeric characters.
Passwords are case-sensitive.
Note: It is extremely important that you do not forget your password. If you forget your
password, you will have to manually reset the switch to its factory defaults. See the
Troubleshooting page for more details. Power cycle will not reset the password.
There are three main buttons associated with this page:
HELP - Displays this window.
APPLY - Updates the switch configuration. No changes are made to the
configuration until this button is pressed.
CANCEL - All changes made to the page are discarded and the switch
configuration remains unchanged

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Tools
On the Tools page, you can restore the switch to default settings, upgrade the firmware of
the switch, or restart the switch.
Restore to Factory Defaults
Forces the switch to restore the original factory settings. To reset the switch, select “Reset to
Factory Defaults” from the drop-down list and click APPLY.
Upgrade Firmware
Upgrades the switch system firmware using a file provided by 3Com. Select “Upgrade
Firmware” from the Tools drop-down list then click on the “Browse” button to select the
firmware file. Normally you will use the .wrp file for the upgrade. Click the “APPLY”
button to upgrade the selected switch firmware file. After the file is successfully transferred,
the switch will be automatically restarted/rebooted causing a temporary stopping all
communication to and through the unit. The “System Rebooting” window will appear
during the reboot process. After the reset is complete, the user interface displays the “login“
page.
You can download firmware files for your switch from the Support section of the 3Com
web site at www.3com.com.

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Upload/Download Configuration
To upload or download the configuration file, select “Upload/Download Configuration”
from the Tools drop-down list, then click “Upload” or “Download,” and then click on the
“Browse” button to select the file.
Restart Switch
To restart the switch, select from the Tools drop-down list, and then click APPLY. The reset will be
complete when the user interface displays the login page.
There are three main buttons associated with this page:
HELP - Displays this window.
APPLY - Updates the switch configuration. No changes are made to the configuration until
this button is pressed.
BROWSE - Navigates to a file.

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Port Configuration
This page allows you to configure Jumbo Frames, Speed, Duplex and Flow Control settings for every port
on the switch.
Enable Jumbo Frames - Click box to enable jumbo frames. This setting is applied to all the
ports on the switch.
The Port Configuration table has one row for each port and four columns. The columns are:
Port - The front-panel port-number of the port. This cannot be changed.
Speed/Duplex - A combined data-rate and duplex setting for the port.
Flow Control - Used to control congestion and to minimize the number of dropped packets.
There are three main buttons associated with this page:
HELP - Displays this window.
APPLY - Updates the switch configuration. No changes are made to the configuration until this
button is pressed.
CANCEL - All changes made to the page are discarded and the switch configuration remains
unchanged.

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Speed/Duplex
The Speed and Duplex settings for the port are set by a single drop-down list. The possible values are:
Auto - Speed and duplex settings are auto-negotiated.
10HDX - 10 Mbps, half-duplex
10FDX - 10 Mbps, full-duplex
100HDX - 100 Mbps, half-duplex
100FDX - 100 Mbps, full-duplex
1000FDX - 1000 Mbps, full-duplex
Note: Auto is the default setting and need not be changed unless you are experiencing problems
establishing link with a connected device (i.e. the front-panel LEDs or STATUS > Overview page
indicate that the link is down when there is a cable connecting a device to the switch).
Note: Auto causes the switch to negotiate the link speed and duplex settings with the connected device;
this is called Auto-negotiation. All of the other settings cause Auto-negotiation to be turned off.
Note: In full-duplex mode, both ends of a connection can send traffic at the same time which effectively
doubles the available throughput. In half-duplex mode, only one end of the connection can send traffic at
any one time.
Flow Control
When Flow Control is selected on a port (by clicking on the tick-box in the Flow Control column), the
switch will attempt to slow incoming traffic down when traffic levels are high. It does this by sending
special Pause packets on full-duplex connections or creating back-pressure (deliberately causing
collisions) on half-duplex connections. This can increase traffic throughput by reducing the number of
dropped packets and, as a result, the number of resends that are required. However it is not appropriate in
all circumstances.

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Storm Control
This page allows you to set up a threshold for incoming broadcast and multicast packets. Too many incoming
packets can severely cripple the switch and network performance. Rate limiting protects the switch and network by
keeping the amount of data passing through the ports to a safe limit. The use of VLANs and Trunks to partition ports
and network devices into separate groups can also keep the network from unnecessary traffic by restricting the
packet destination. The same setting is applied to all the ports on the switch.
Enable Storm Control –Click the check box to enable storm control for the specific frame type.
Rate(number of frames per second) –The Rate field is set by a single drop-down list. The same threshold
is applied to every port on the switch. When the threshold is exceeded, packets are dropped, irrespective of
the flow-control settings.
There are three main buttons associated with this page:
HELP - Displays this window.
APPLY - Updates the switch configuration. No changes are made to the configuration until this button is
pressed.
CANCEL - All changes made to the page are discarded and the switch configuration remains unchanged.

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Port Mirroring
This page allows you to copy (mirror) incoming and outgoing packets on multiple ports to a single port. This can be
useful for diagnosing problems. The page is split into two sections:
Port to Mirror to - Choose the destination port. All the mirrored packets will be sent to the selected port.
Ports to Mirror - The front-panel port number.
Note: You cannot mirror the destination port.
There are three main buttons associated with this page:
HELP - Displays this window.
APPLY - Updates the switch configuration. No changes are made to the configuration until this button is
pressed.
CANCEL - All changes made to the page are discarded and the switch configuration remains unchanged.

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Port to Mirror to
Select the destination port from the Port to Mirror to drop-down list. Any port can be selected. The tick-box of the
selected port will be cleared and disabled (see the Ports to Mirror section).
Note: Broadcast and Multicast packets are not mirrored since they are flooded to all ports anyway.
Ports to Mirror
There are two columns in this table. One is titled Port and one is titled Mirroring Enabled.
Port - The front-panel port number.
Mirroring Enabled - This field is associated with the port-number that is displayed immediately on its
left. Click on the tick-box to enable/disable Port Mirroring for the port.
Note: It will not be possible to select Mirroring Enabled for the destination port (the Port to Mirror to).

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Cable Diagnostics
You can perform cable diagnostics for all ports or selected ports to diagnose any cable faults
(short, open etc..) and feedback a distance to the fault.
Cable Diagnostics –Cable diagnostics is performed on a per-port basis. Select the
port number from the drop-down list.
Cable Status –Shows the cable length, operating conditions and isolates a variety of
common faults that can occur on Category 5 twisted pair cabling.
There are two main buttons associated with this page:
HELP - Displays this window.
APPLY - Updates the switch configuration. No changes are made to the configuration until
this button is pressed.

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Trunk Membership
This page allows you to create a maximum of 4 trunks of up to 4 ports each. For instructions on how to create,
modify, and delete trunks, please see Working with Trunks.
The Membership Table has one row for each port and a column for each trunk, plus an additional column for ports
that are not members of a trunk. Each row contains radio buttons which are used to indicate which trunk (if any) the
port belongs to. Each radio button is in a column of its own. The columns are:
Port - The front-panel port number.
Not a Trunk Member - If the radio button in this column is selected, the port is not a member of any
trunks. This is the default state.
Trunk T1 - T4 - These columns correspond to the 4 trunks that are supported by the switch. Clicking on
the radio button in any one of these columns causes the port to become a member of the corresponding
trunk. Each trunk can have a maximum of 4 ports, and a minimum of 2 ports.
When a trunk is first created it is given the following, default configuration:
Speed/Duplex is set to Auto Speed (see TRUNKS > Configuration)
Flow Control is turned off (see TRUNKS > Configuration)
The trunk is a member of VLAN 1 with a PVID of 1. The trunk will accept both tagged and untagged
packets (see VLANS > VLAN Settings)
Ports that are removed from a trunk retain the configuration (i.e. Speed, Duplex, and Flow Control) that they had
when they were members of the trunk. Ports that are added to the trunk after its creation, inherit the current
configuration of the trunk.
You can configure the trunks from the TRUNKS > Configuration page.