LevelOne GEP-2841 Programming manual

Web Management Guide
( GEP-2841 )

Chapter Ⅰ Product Introduction
Product introduction
The LevelOne GEP-2841 Web Smart Gigabit PoE Switch, provides 24 PoE ports
10/100/1000Base-T plus 2 port Gigabit Uplink SFP and 2 port Gigabit Uplink RJ45 to
enable high speed network. With the plus the clearly visible status LEDs provide simple
monitoring of port link activity. Moreover, the SFP slots support pluggable modules that
enabling you to choose from a variety of transceivers. It offers powerful enhanced PoE
functionality and a total PoE budget of 375W. and it is fully complied with
IEEE802.3af/at/bt PoE standard at maximum 90W(1-2 port) power budget. supports up
to 30W output power per PoE port, giving you power distribution flexibility for a wide
range of PoE PD devices. It helps to save infrastructure wiring costs dramatically by
eliminating electric wiring and less UPS needed.
Front interface
Figure 1-3
Definition of operating mode switch!
Mark
Work mode
Description
Unmanaged
Unmanaged
mode
All ports communicate freely, and the parameters
configured in Web mode do not take effect
Web Smart
WEB managed
mode
The web network management function is
effective, and the switch can be managed and
configured
Indicator!
Figure 0-4

S/N
Indicator
Status
Description
①
Power
Light on
Power on
Light off
No power
②
PoE
Light on
PoE power in
Light off
PoE without power
③
1000M
Light on
The current operating rate is 1000Mbps
Light off
The current operating rate is 10 /
100Mbps or the link is not connected
④
Link/Act
Light on
The link is connected
Light flash
The port has data transceiver
Light off
the link is not connected
List of accessories
l Master unit
l Power cord
l Quick Installation Guide
l L-shaped bracket and other
l Rubber Feet
Installation guide
For the safe installation and operation of the switch, it is recommended that you!
1. Check that the power cord is securely wrapped around the AC power connector"
2. Ensure proper heat dissipation and ventilation around the switch"
3. Do not stack heavy objects on the switch"
Mounting to rack
1. Check the grounding and stability of the frame"
2. Install the two L-shaped brackets in the accessories on both sides of the switch panel
and fix them with the screws provided in the accessories, as shown in Figure 2-1"
3. Place the switch in the appropriate position in the rack and supported by the bracket"
Fix the L-shaped bracket on the guide grooves fixed at both ends of the rack with screws
to ensure that the switch is stably and horizontally installed on the machine, as shown in

Figure 2-2"
Power Plug
1. The power line of the switch adopts a single-phase three wire power socket, the
middle pin is the grounding wire, the left pin is the zero wire, and the right pin is the live
wire. Please check before operation. Figure 2-3
Connect the power cable
1. Check that the selected power supply is consistent with the power supply requirements
marked on the switch#
2. Built in without power adapter, it can be directly connected to AC100 ~ 240V, 50 ~
60Hz mains power; As shown in Figure 2-4
Connect SFP port
The process of installing the optical fiber module in the switch is as follows!
Grasp the optical fiber module from the side and insert it smoothly along the SFP port
slot of the switch until the optical fiber module is in close contact with the switch, as
shown in Figure 2-5"
Figure 2-5
Installation inspection
Please check the following items after installation!

1. Check whether there is enough heat dissipation space around the switch and whether
the air circulation is smooth#
2. Check whether the power supply of the power socket meets the specification of the
switch#
3. Check that the power supply, switch, rack and other equipment are properly
grounded#

Chapter Ⅱ Login management interface
Logging on to the equipment
1. Connect the RJ-45 interface cable of a switch with a computer using a network cable.
2. Set the TCP/IP properties of the computer, see the Appendix: Setting up yourcomputer.
3. Logging on to the equipment: Open a browser and type 192.168.1.1 in the address bar,
and then press Enter; in the pop-up login interface, enter the factory logon username
"admin", password "admin" and click OK.
Figure 0-1

Chapter Ⅲ WEB Managed function
Web details
① Interface status: displays the working status of the port. Green indicates that the port
is connected, and unshaded indicates that the port is not connected"
② Function navigation tree: you can quickly switch to the corresponding function page
through function navigation"
③ Function details: information display and configuration details of the currently selected
function"
System
1. Information
The system information page displays the basic information of the switch system, including
equipment model, MAC address, IP information, firmware and hardware version
information"
Figure 0-1

2. IP Setting
Displays and sets the management IP address of the switch"
When the IP mode is "static IP", you can manually configure IP address, subnet mask and
gateway information"
When the IP mode is "DHCP", the switch will automatically obtain IP information through
the DHCP server in the network"
When switching IP mode, you need to restart the switch before it takes effect#
After modifying the management IP and restarting it, you need to log in with the
new IP address and ensure that the network segment of the management
computer matches it"
Figure 0-2
3. User Account
The user setting page can modify the user name and password of the switch management
account. If a new user name is set on this page, the original user name will become invalid."
Figure 0-3

4. Port Setting
Figure 0-4
On the port setting page, the user sets and displays the port status, including the following
contents!
Alias: used to describe or comment on the port#
Status: "on" and "disabled". If it is set to "disabled", the port will be closed manually and
communication cannot be carried out#
Speed / duplex: all interfaces are in "automatic" state by default, i.e. adaptive mode. It can
be manually configured as "full duplex / half duplex mode", and the rates of 10m, 100m
and 1000m are optional. It is generally recommended to select "automatic" mode#
Flow control: when the flow control is turned on and the port is blocked, the switch will send
a "passuse" frame to the informant to inform the information source to suspend sending
information for a period of time"

Configuration
VLAN
1. Static VLAN
Figure 0-5
Static VLAN is used to set 802.1Q VLAN properties of switch ports"
VLAN ID
!
Identifier used to distinguish different VLANs. Terminals between different
VLANs cannot communicate directly"
VLAN
!
The naming or description of the corresponding VLAN is usually used to intuitively
distinguish the purposes of different VLANs"
Untagged
!
For the port identified as untagged, when the data frame exits the port, if it is
a frame with VLAN tag, it will be removed and sent again. If it is a data frame without tag,
it will be sent directly. For data frames entering the port, the port will be labeled with the
corresponding VLAN ID inside the switch. Usually used to access terminal equipment"
Tagged
!
The port identified as tagged carries the VLAN ID tag when the data frame is
sent out. Therefore, the opposite end equipment must be able to identify the VLAN tag,
otherwise the data cannot be identified normally. It is usually used to connect trunk and
hybrid ports of managed switches or router ports supporting VLAN"
Not Member
!
When the port is checked, it means that the current port does not belong to
the member port of this VLAN"
Add/Delete VLAN
Fill in the VLAN ID and VLAN name to be added (optional)#
Select the corresponding option under the port name according to the untag and tag
attributes required by the port (click the "VLAN all" button of the corresponding option to

set all ports as the corresponding attributes)#
Click the "add / modify" button below"
Delete VLAN
Check the delete selection box behind the corresponding VLAN ID in the VLAN list below,
and click the "delete" button to delete the corresponding VLAN#
VLAN 1 is the default VLAN and cannot be deleted. Click "select all" to select all VLANs
except VLAN 1 and delete all VLANs except VLAN 1"
2. Port-based VLAN
Figure 0-6
The VLAN port setting page is used to set the PVID (port based VLAN ID) of the port and
the frame format received by the port"
PVID: All ports have only one PVID. When unlabeled data frames enter the switch port,
the switch will label the data frames from the port with PVID. The default PVID for all ports
is 1"
Receive frame format
ALL!The specified port processes the received frames regardless of whether they are
labeled or not. For untagged frames, VLAN tags are marked with PVID for next processing.
For the tagged frame, if the port belongs to the member of the corresponding VLAN ID, the
next step will be processed. If it does not belong to the member, it will be discarded"
Tag-only!The specified port receives only labeled data frames. General client devices do
not support VLAN tagging, so the port connecting the client may not be able to
communicate when this option is selected"
Untag-only: The specified port only receives unlabeled data frames. If the peer device
interface communicates with multiple VLANs (such as the trunk interface of the switch and
the VLAN based sub interface configured in the router), only pvids can communicate"
For example
!
As shown in Figure 3-8, VLAN 10, 20 and 30 have been configured for the
superior equipment, and the corresponding VLAN is allowed to pass through the port
connected to the switch. The three terminals connected by Ports 1, 2 and 3 of the machine

are planned to VLAN 10, 20 and 30 respectively"
Figure 0-7
First, add corresponding VLAN and port settings on the static VLAN page. Take vlan10 as
an example, fill in VLAN ID 10, select untagged under port 1, and tagged under port 24,
and click Add. After all VLANs are added, it should be as shown in Figure 3-9"
Figure 0-8
Then enter the "VLAN port setting" page, select port 1, fill in PVID 10, and click apply. Set
port 2 and port 3 respectively according to this method, and pvids are 20 and 30
respectively. After completion, see Figure 3-10"

Figure 0-9
For example: as shown in Figure 3-11, when it is necessary to access multiple
broadband and the number of available physical interfaces of the router is
insufficient, it is necessary to expand the WAN port through the switch (this function
needs to be supported by the router function)"
Figure 0-10
The relevant settings of the switch are the same as those in the previous example, except
that 24 ports are connected to the router, and 1-3 ports are connected to the corresponding
operator access equipment respectively. After completion, use the corresponding VLAN ID
in the router to configure the corresponding sub interface or related WAN port configuration"

QoS
1. Priority selection
Figure 0-11
The priority selection page sets different types of priorities for packets forwarded by the
switch. The higher the value, the higher the priority"
2. Dscp remapping
Figure 0-12
Set the DSCP value in the IP packet entering the switch port, and determine the output
queue of the packet according to the DSCP value and priority configured by the user. Select

the DSCP value and level priority value to be set to determine the output queue of data
packets"
3. Priority to Queue
Figure 0-13
The queue priority page is used to prioritize the packet queue output by the switch. The
output queue of packets has been determined. The higher the priority value is, the higher
the priority is, and the data in this queue will be forwarded first"
4. Port-based Priority
Figure 0-14
The port priority page is used to prioritize the data packets transmitted by the switch port.
The higher the value, the higher the priority"

5. Packet Scheduling
On the queue scheduling page, you can select the scheduling policy and corresponding
priority in the queue priority to define the weight value. (weight value min 1 max 15)"
IGMP Setting
Figure 0-15
After IGMP setting is enabled, the multicast message is only forwarded to the
corresponding member port. For non member ports, the data message of the multicast
group will not be forwarded, and the unknown multicast message will be discarded"
When IGMP function is not enabled, group broadcast messages will be broadcast and
forwarded to all ports"
Trunk Setting
Specifies the Ports to which Trunk Group ID.

Figure 0-16
Port-based Mirroring
Figure 0-17
The port mirroring function can be set to copy the data in the specified direction of the port
to the mirrored port. Up to 4 sets of port mirroring can be set"
Direction
!
RX refers to the data entering the port from the outside of the port, TX refers
to the data sent from the port, and both is bidirectional"
Mirroring Port
!
Port the target port of the mirror image. The mirrored data will be sent to
this port. For example, in packet capturing applications, this interface is used to connect
computers running packet capturing software"
Mirrored port
!
The data source port of the port mirroring function. Packets in the specified
direction of the mirrored port will be copied to the mirrored port"
For example
!
As shown in Figure 3-19, the administrator connects the computer with the
packet capturing software to port 1 of the switch, and needs to capture and analyze the
data sent by the computer connected to port 2"

Figure 0-18
As shown in Figure 3-20 below, Rx is selected for the direction (messages sent by the
equipment connected to the switch are received for the switch port), 1 is selected for the
mirror port, and 2 is selected for the mirrored port"
Figure 0-19
Port Isolation
Figure 0-20
The port isolation function can realize the layer-2 data isolation between different ports and
cannot communicate with each other. By default, all ports are not isolated"
Port
!
Set object port"

Allow forwarding port
!
The port that allows communication with the object port, that is,
the port that is not mirrored and isolated from the object port. Except for the forwarding
port, other ports cannot communicate with the object port"
When adding ports, you can press and hold the mouse to drag and select multiple
continuous ports. When selecting non continuous ports, you can press and hold the CTRL
key to select multiple ports or deselect the corresponding ports"
Example: as shown in Figure 3-22, port 24 of the switch is connected to the Internet
through a router, and port 23 is connected to a server. It is required that all terminals of port
1-22 cannot communicate with each other, but are allowed to access the Internet and
server"
Figure 0-21
Select 1-22 ports in the port column, 23 and 24 ports in the forwarding allowed port column,
and click apply. As shown in Figure 3-23!
Figure 0-22
Isolation cannot be set for all SFP ports"
Generally, it is necessary to ensure that the uplink port is in the allowed forwarding

port of all object ports to ensure normal communication with superior equipment"
Bandwidth Control
Figure 0-23
The bandwidth control function can limit the maximum rate of the specified port and
direction, and the minimum control granularity is 16kbps"
Port
!
Set object port"
Direction
!
Receive or send direction"
Status
!
Enable or disable the bandwidth control function of the object port"
Speed rate
!
Limit the maximum rate.The rate value must be an integer multiple of 16"
Jumbo Frame
Figure 0-24
Jumbo frames refers to Ethernet frames whose payload exceeds 1500 bytes limited by
IEEE 802.3 standard. The minimum setting value of this series of switches is 1522 bytes
and the maximum setting value is 10000 bytes"