CastleNet SOHOSpeed A800 Series User manual

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SO OH HO OS Sp pe ee ed d
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AD DS SL L E Et th he er rn ne et t/ /W Wi ir re el le es ss s G Ga at te ew wa ay y
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Us se er r’ ’s s M Ma an nu ua al l
Revision 1.0
July 2004

SOHOSpeed ADSL Ethernet/Wireless Gateway User’s Manual
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Table of Contents
1. INTRODUCTION.................................................................................................4
1.1 FEATURES ......................................................................................................4
2. GATEWAY OVERVIEW ....................................................................................5
2.1 PORTS AND BUTTONS ....................................................................................5
2.2 LED DESCRIPTION ........................................................................................6
3. INSTALLING YOUR GATEWAY .....................................................................7
4. SETTING UP YOUR GATEWAY .....................................................................8
4.1 LOG INTO YOUR GATEWAY ............................................................................8
4.2 HOME SCREEN...............................................................................................9
4.3 SETUP ..........................................................................................................10
4.3.1 Wide Area Network Connection...........................................................10
4.3.2 Local Area Network Connection..........................................................10
4.4 CONFIGURING THE WAN .............................................................................10
4.4.1 New Connection ...................................................................................11
4.4.1.1 Bridged gateway profile and Connection ........................................11
4.4.1.2 PPPoA Connection Setup ................................................................12
4.4.1.3 PPPoE Connection Setup.................................................................13
4.4.1.4 DHCP Connection Setup .................................................................14
4.4.1.5 Static Connection Setup...................................................................15
4.4.1.6 Classical IP over ATM Connection Setup .......................................16
4.4.2 Modify an Existing Connection............................................................17
4.4.3 Modem Setup........................................................................................17
4.5 CONFIGURING THE WLAN...........................................................................18
4.6 CONFIGURING THE LAN...............................................................................19
4.6.1 Enable/Disable DHCP.........................................................................20
4.6.2 Changing the gateways IP address......................................................21
4.6.2.1 Static IP address assignment............................................................21
4.6.3 Firewall/NAT Services .........................................................................22
4.7 ADVANCED ...................................................................................................22
4.7.1 Wireless Security..................................................................................23
4.7.1.1 WEP .................................................................................................23
4.7.1.2 802.1x...............................................................................................24
4.7.1.3 WPA.................................................................................................25
4.7.2 Wireless Management..........................................................................26
4.7.2.1 Access List .......................................................................................26
4.7.2.2 Associated Stations ..........................................................................27
4.7.2.3 Multiple SSID ..................................................................................28
4.7.3 UPnP....................................................................................................29
4.7.4 Port Forwarding ..................................................................................30
4.7.5 Advanced Security................................................................................31
4.7.5.1 DMZ configuration ..........................................................................31
4.7.5.2 Enable Remote Web ........................................................................31
4.7.5.3 Enable Remote Telnet......................................................................32
4.7.5.4 Enable Incoming ICMP Ping ...........................................................32
4.7.6 Access Control .....................................................................................32
4.7.7 LAN clients...........................................................................................32

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4.7.8 Bridge Filters .......................................................................................32
4.7.9 Multicast ..............................................................................................34
4.7.10 Static Routing.......................................................................................35
4.7.11 Dynamic Routing .................................................................................36
4.8 TOOLS ..........................................................................................................37
4.8.1 System Commands ...............................................................................37
4.8.2 Remote Log ..........................................................................................37
4.8.3 User Management................................................................................38
4.8.4 Update Gateway...................................................................................38
4.8.5 Ping Test ..............................................................................................39
4.8.6 Modem Test..........................................................................................39
4.8.7 UI Support............................................................................................39
4.9 STATUS.........................................................................................................40
4.9.1 Network Statistics.................................................................................40
4.9.2 Connection Status ................................................................................40
4.9.3 DHCP Clients ......................................................................................40
4.9.4 Modem Status.......................................................................................40
4.9.5 Product Information.............................................................................40
4.9.6 System Log ...........................................................................................40
5. APPENDIX A: TROUBLESHOOTING .......................................................... 41
5.1 THE GATEWAY IS NOT FUNCTIONAL.............................................................41
5.2 I CAN’T CONNECT TO THE GATEWAY............................................................41
5.3 THE LEDS BLINK IN A SEQUENTIAL PATTERN..............................................42
5.4 THE DSL LINK LED CONTINUES TO BLINK BUT DOES NOT GO SOLID.........42
5.5 THE DSL LINK LED IS ALWAYS OFF...........................................................42
6. GATEWAY TERMS ..........................................................................................43

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1. Introduction
The SOHOSpeed ADSL Gateway is the perfect high-speed WAN bridge/router. This full-
featured product is specifically designed to connect to the Internet and directly connect to
your local area network via high speed 10/100 Mbps Ethernet or 802.11b/g. The gateway also
has full NAT firewall and DMZ services to block unwanted users from accessing your network.
1.1 Features
• Equipped with a 1 or 4-Port 10/100 Ethernet Switch
• Equipped with IEEE 802.11b/g WLAN AP (wireless models)
• High speed wireless connection, up to 54 Mbps (wireless models)
• Connects multiple PCs to the Internet with just one WAN IP Address (when
configured in router mode with NAT enabled)
• Configurable through user-friendly web pages
• Supports Single-Session IPSec and PPTP Pass-Through for Virtual Private Network
(VPN)
• Several popular games are already pre configured. Just enable the game and the
port settings are automatically configured.
• Configurable as a DHCP Server on Your Network
• Compatible with virtually all standard Internet applications
• Industry standard and interoperable DSL interface
• Address Filtering, DMZ Hosting, and Much More
• Support 64, 128 and 256 bits WEP / WPA / WPA-PSK / 802.1x (wireless models)
• Simple web based status page displays a snapshot of your system configuration, and
links to the configuration pages
• Downloadable flash software upgrades
• Support for up to 8 Permanent Virtual Circuits (PVC)
• Support for up to 8 PPPoE sessions
• Supports Classical IP over ATM (CLIP or also referred to as RFC1577)

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2. Gateway Overview
Your gateway has many ports, switches and LEDs. Let’s take a look at the different options.
Depending upon your model of gateway, your gateway may have some or all of the features
listed below
2.1 Ports and Buttons
(1 Port Ethernet Gateway)
(1 Port Wireless Gateway)
(4 Ports Ethernet Gateway)
(4 Ports Wireless Gateway)
RESET: The RESET button will set the gateway to its factory default setting and reset the
gateway. You may need to place the gateway into its factory defaults if the configuration is
changed, you loose the ability to enter the gateway via the web interface, or following a
software upgrade, and you loose the ability to enter the gateway. To reset the gateway,
simply press the reset button for more than 10 seconds. The gateway will be reset to its
factory defaults and after about 30 seconds the gateway will become operational again.
POWER: Connect the power adapter that came the Gateway. Using a power supply with a
different voltage rating will damage this product. Make sure to observe the proper power
requirements. The power requirement is 12 volts.
LAN (local area network) port(s): Connect to Ethernet network devices, such as a PC, hub,
switch, or router. Some gateways come with a single LAN connection and some come with
four LAN connections. Depending on the connection, you may need a cross over cable or a
strait through cable.
USB (universal serial port): Connects this port to a PC’s USB port. The gateway only
supports Window’s based PCs via an RNDIS driver (included in the software).
ADSL port: This is the WAN interface which connects directly to your phone line.

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2.2 LED Description
(1 Port Ethernet Gateway)
(1 Port Wireless Gateway)
(4 Ports Ethernet Gateway)
(4 Ports Wireless Gateway)
Power LED: The LED stays lighted to indicate the system is power on properly.
WAN LED: This LED is lighted when the WAN connection is established and flashes when
the WAN port is sending/receiving data.
WLAN LED: This LED is lighted when a wireless link is established and flashes when the
data is sending/receiving via wireless. (wireless models)
PPP LED: This LED is lighted when a PPP link is established and flashes when the data is
sending/receiving via PPP. (Ethernet models)
LAN LED: The LED is lighted when a connection is established to LAN port and flashes when
LAN port is sending/receiving data. (The number of LAN ports depends on your model.)
USB LED: The LED is lighted when a connection is established to USB port and flashes
when USB port is sending/receiving data.

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3. Installing Your Gateway
1. Locate an optimum location for the gateway.
2. For connections to the Ethernet and DSL interfaces, refer to the quick start guide.
3. Connect the AC Power Adapter. Depending upon the type of network, you may want to put
the power supply on an uninterruptible supply. Only use the power adapter supplied with the
gateway. A different adapter may damage the product.
Now that the hardware installation is complete, proceed to Chapter 4: Setting up your
gateway

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4. Setting up Your Gateway
This section will guide you through your gateway’s configuration. The gateway is shipped with
a standard default bridge configuration; for most users, you may want to change the gateway
from a bridge to a router.
4.1 Log into Your Gateway
To configure your gateway, open your web browser. You may get an error message at this
point; this is normal. Don’t panic. Continue following these directions. Type the default IP
address (192.168.1.1) Press the Enter key and the following screen, shown in Figure 1 will
appear. The default user name is Admin (case sensitive) and the password is Admin (case
sensitive).
Note: Before setting up your gateway, make sure you have followed the quick start guide. You
should have your computers configured for DHCP mode and have proxies disabled on your
browser. Also if you access the Gateway, and instead of getting a login screen, the browser
instead displays a login redirection screen, you should check your browser's setting, and
verify that JavaScript support is enabled. Also, if you do not get the screen shown in Figure 1,
you may need to delete your temporary Internet files (basically flush the cached web pages).
Figure 1 (Log-in screen)

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4.2 Home Screen
The first screen (Figure 2) that appears (after the log in screen) is the Home screen. From this
screen the user can setup the modem (configure the LAN and WAN connection(s), configure
the advanced configuration options within the modem (security, routing, and filtering), access
tools that are helpful for debug purposes, obtain the status of the modem, and view the
extensive online help.
The basic layout of the Home page consists of a page selection list across the top of the
browser window. The footer displays gateway status, connection information, and other useful
information. The center display is where most of the configuration will take place.
Figure 2 (Home page)

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4.3 Setup
To setup your gateway with a basic configuration, from the Home page, select Setup. Figure
3 illustrates the setup page. The page is broken into two subsections the WAN configuration
and the LAN configuration.
Before configuring the Gateway, there are several concepts that you should be familiar with
on how your new Gateway works. Please take a moment to familiarize yourself with these
concepts, as it should make the configuration much easier.
Figure 3 (Setup page)
4.3.1 Wide Area Network Connection
On the other side of the Gateway is where your Wide Area Network (WAN) connection; also
referred to as a broadband connection. This WAN connection is different for every WAN
supplier. Most of the configuration you will perform will be in this area.
4.3.2 Local Area Network Connection
On one side of your Gateway, you have your own Local Area network (LAN) connections.
This is where you plug in your local computers to the Gateway. The Gateway is normally
configured to automatically provide all the PC's on your network with Internet addresses.
4.4 Configuring the WAN
Before the gateway will pass any data between the LAN interface(s) and the WAN interface,
the WAN side of the modem must be configured. Depending upon your DSL service provider
or your ISP, you will need some (or all) of the information outlined below before you can
properly configure the WAN:
• Your DSL line VPI and VCI
• Your DSL encapsulation type and multiplexing
• Your DSL training mode (default is MMODE)

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For PPPoA or PPPoE users, you also need these values from your ISP:
• Your username and password
For RFC 1483 users, you may need these values from your ISP:
• Your DSL fixed Internet IP address
• Your Subnet Mask
• Your Default Gateway
• Your primary DNS IP address
4.4.1 New Connection
A new connection is basically a virtual connection. Your gateway can support up to 8 different
(unique) virtual connections. If you have multiple different virtual connections, you may need
to utilize the static and dynamic routing capabilities of the modem to pass data correctly.
4.4.1.1 Bridged gateway profile and Connection
A pure bridged connection does not assign an IP address to the WAN interface. NAT and
firewall rules are not enabled. This connection method makes the Gateway act as a hub, and
just passes packets across the WAN interface to the LAN interface.
To configure the gateway as a bridge, from the Home page, click on Setup and then click on
New Connection. The default PPPoE connection setup is displayed. At the Type field select
Bridge and the Bridge connection setup page is displayed (see Figure 4). Give your Bridge
connection a unique name; the name must not have spaces and cannot begin with numbers.
In this case the unique name is called bridge1. Select the encapsulation type (LLC or VC); if
you are not sure just use the default mode. Select the VPI and VCI settings; your DSL service
provider or your ISP will supply these; in this case the DSL service provider is using 0,35.
Also select the quality of service (QOS); leave the default value if you are unsure or the ISP
did not provide this information.
Figure 4 (Bridge Connection Setup)
To complete the connection you must now click the apply button. The apply button will
temporarily save this connection. To make the change permanent you need to click on Tools

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(at the top of the page) and select System Commands. At the system commands page, click
on Save All.
4.4.1.2 PPPoA Connection Setup
PPPoA is also known as RFC 2364. It is a method of encapsulating PPP packets over ATM
cells which are carried over the DSL line. PPP or Point-to-Point protocol is a method of
establishing a network connection / session between network hosts. It usually provides a
mechanism of authenticating users. LLC and VC are two different methods of encapsulating
the PPP packet. Contact your ISP to make sure which encapsulation is being supported.
By selecting PPPoA, you are forcing your gateway to terminate the PPPoA connection. The
advantage is that the PPPoA termination is done within the gateway and not on your PC; this
frees up your PC resources and allows multiple users to utilize the PPPoA connection.
To configure the gateway for PPPoA, click on Setup and then click on New Connection. The
default PPPoE connection setup is displayed. At the Type field select PPPoA and the PPPoA
connection setup page is displayed; figure 5 illustrates a typical PPPoA configuration. Give
your PPPoA connection a unique name; the name must not have spaces and cannot begin
with numbers. In this case the unique name is called PPPOA1. Select the encapsulation type
(LLC or VC); if you are not sure just use the default mode. Select the VPI and VCI settings;
your DSL service provider or your ISP will supply these; in this case the DSL service provider
is using 0,40. Also select the quality of service (QOS); leave the default value if you are
unsure or the ISP did not provide this information.
Following is a description of the different options:
a. Username: The username for the PPPoA access; this is provided by your DSL
service provider or your ISP.
b. Password: The password for the PPPoA access; this is provided by your DSL
service provider or your ISP.
c. On-Demand: Enables on-demand mode. The connection will disconnect if no
activity is detected after the specified idle timeout value.
d. Idle Timeout: Specifies that PPPoA connection should disconnect if the link has
no activity detected for n seconds. This field is used in conjunction with the On-
Demand feature. To ensure that the link is always active, enter a 0 in this field.
e. Keep Alive: When on-demand option is not enable, this value specifies the time to
wait without being connected to your provider before terminating the connection.
To ensure that the link is always active, enter a 0 in this field.
f. Maxfail: As long as a DSL connection is established, the gateway will attempt to
establish a PPPoA connection. If after n consecutive failed connection attempts
the gateway will wait for some random time before trying to establish the
connection again. A value of 0 means no limit.
g. Set Route: Specify this connection as the default-route.
h. MRU: Maximum Receive Unit the DSL connection can receive. It is a negotiated
value that asks the provider to send packets of no more than n bytes. The
maximum specified value is 1500 although some DSL/ISP providers require a
larger value. The minimum MRU value is 128.
i. Debug: Enables PPPoA connection debugging facilities. Debugging is talked
about later.

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Figure 5 (PPPoA Connection Setup)
To complete the connection you must now click the apply button. The apply button will
temporarily save this connection. To make the change permanent you need to click on Tools
(at the top of the page) and select System Commands. At the system commands page, click
on Save All.
4.4.1.3 PPPoE Connection Setup
PPPoE is also known as RFC 2516. It is a method of encapsulating PPP packets over
Ethernet. PPP or Point-to-Point protocol is a method of establishing a network
connection/session between network hosts. It usually provides a mechanism of authenticating
users.
To configure the gateway for PPPoE, click on Setup and then click on New Connection. The
default PPPoE connection setup is displayed. At the Type field select PPPoE and the PPPoE
connection setup page is displayed; figure 6 illustrates a typical PPPoE configuration. Give
your PPPoE connection a unique name; the name must not have spaces and cannot begin
with numbers. In this case the unique name is called PPPOE1. Select the encapsulation type
(LLC or VC); if you are not sure just use the default mode. Select the VPI and VCI settings;
your DSL service provider or your ISP will supply these; in this case the DSL service provider
is using 0,30. Also select the quality of service (QOS); leave the default value if you are
unsure or the ISP did not provide this information.
Following is a description of the different options:
j. Username: The username for the PPPoE access; this is provided by your DSL
service provider or your ISP.
k. Password: The password for the PPPoE access; this is provided by your DSL
service provider or your ISP.
l. On-Demand: Enables on-demand mode. The connection will disconnect if no
activity is detected after the specified idle timeout value.
m. Idle Timeout: Specifies that PPPoE connection should disconnect if the link has
no activity detected for n seconds. This field is used in conjunction with the On-
Demand feature. To ensure that the link is always active, enter a 0 in this field.

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n. Keep Alive: When on-demand option is not enable, this value specifies the time to
wait without being connected to your provider before terminating the connection.
To ensure that the link is always active, enter a 0 in this field.
o. Maxfail: As long as a DSL connection is established, the gateway will attempt to
establish a PPPoE connection. If after n consecutive failed connection attempts
the gateway will wait for some random time before trying to establish the
connection again. A value of 0 means no limit.
p. Set Route: Specify this connection as the default-route.
q. MRU: Maximum Receive Unit the DSL connection can receive. It is a negotiated
value that asks the provider to send packets of no more than n bytes. The
maximum specified value is 1500 although some DSL/ISP providers require a
larger value. The minimum MRU value is 128.
r. Enforce MRU: Check this box if you experience problems accessing the Internet
over a PPPoE connection. This feature will force all TCP traffic to conform with
PPP MRU by changing TCP Maximum Segment Size to PPP MRU.
s. Debug: Enables PPPoE connection debugging facilities. Debugging is talked
about later.
Figure 6 (PPPOE Connection Setup)
To complete the connection you must now click the apply button. The apply button will
temporarily save this connection. To make the change permanent you need to click on Tools
(at the top of the page) and select System Commands. At the system commands page, click
on Save All.
4.4.1.4 DHCP Connection Setup
Dynamic Host Configuration Protocol (DHCP) allows the gateway to automatically obtain the
IP address from the server. This option is commonly used in situations where IP is
dynamically assigned and is not known prior to assignment.

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To configure the gateway for a DHCP connection, click on Setup and then click on New
Connection. The default DHCP connection setup is displayed. At the Type field select DHCP
and the DHCP connection setup page is displayed; figure 7 illustrates a typical DHCP
configuration. Give your DHCP connection a unique name; the name must not have spaces
and cannot begin with numbers. In this case the unique name is called DHCP1. Select the
encapsulation type (LLC or VC); if you are not sure just use the default mode. Select the VPI
and VCI settings; your DSL service provider or your ISP will supply these; in this case the
DSL service provider is using 0,35. Also select the quality of service (QOS); leave the default
value if you are unsure or the ISP did not provide this information.
If your DSL line is connected and your DSL/ISP provider is supporting DHCP, you can click
the renew button and the gateway will retrieve an IP address, Subnet mask, and Gateway
address. At anytime, you can renew the DHCP address by clicking on the renew button; in
most cases you will never have to use this button.
Figure 7 (DHCP Connection Setup)
To complete the connection you must now click the apply button. The apply button will
temporarily save this connection. To make the change permanent you need to click on Tools
(at the top of the page) and select System Commands. At the system commands page, click
on Save All.
4.4.1.5 Static Connection Setup
Static is used whenever a known static IP is assigned. The accompanying information such
as the Subnet mask and the gateway should also be specified. Up to three Domain Name
Server (DNS) addresses can also be specified. These servers would enable you to have
access to other web servers. Valid IP addresses range is from 0.0.0.0 to 255.255.255.255.

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To configure the gateway for a Static connection, click on Setup and then click on New
Connection. The default Static connection setup is displayed. At the Type field select Static
and the Static connection setup page is displayed; figure 8 illustrates a typical Static
configuration. Give your Static connection a unique name; the name must not have spaces
and cannot begin with numbers. In this case the unique name is called STATIC1. Select the
encapsulation type (LLC or VC); if you are not sure just use the default mode. Select the VPI
and VCI settings; your DSL service provider or your ISP will supply these; in this case the
DSL service provider is using 0,35. Also select the quality of service (QOS); leave the default
value if you are unsure or the ISP did not provide this information. You can also enable
Network Address Translation (NAT) and the Firewall options. If you are unsure, leave these in
the default mode.
Based upon the information your DSL/ISP provided, enter your assigned IP address, Subnet
Mask, Default Gateway (if provided), and Domain Name Services (DNS) values (if provided).
For the static configuration, you can also select a bridge connection or a routed connection.
Since static IP address is typically used to host WEB servers, you may want to use a bridge
connection.
Figure 8 (Static IP Connection Setup)
To complete the connection you must now click the apply button. The apply button will
temporarily save this connection. To make the change permanent you need to click on Tools
(at the top of the page) and select System Commands. At the system commands page, click
on Save All.
4.4.1.6 Classical IP over ATM Connection Setup
The Classical IP over ATM (CLIP) support provides the ability to transmit IP packets over an
ATM network, SOHOSpeed ADSL Gateway’s CLIP support will encapsulate IP in an AAL5
packet data unit (PDU) frame using RFC1577and it utilizes an ATM aware version of the ARP
protocol. (ATMARP. SOHOSpeed ADSL Gateway’s CLIP support only allows for PVC support;
it does not support SVC.)

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To configure the gateway for a CLIP connection, click on Setup and then click on New
Connection. The default CLIP connection setup is displayed. At the Type field select CLIP
and the CLIP connection setup page is displayed; figure 9 illustrates a typical CLIP
configuration. Give your CLIP connection a unique name; the name must not have spaces
and cannot begin with numbers. In this case the unique name is called CLIP1. Select the VPI
and VCI settings; your DSL service provider or your ISP will supply these; in this case the
DSL service provider is using 0,35. Also select the quality of service (QOS); leave the default
value if you are unsure or the ISP did not provide this information.
Figure 9 (CLIP Connection Setup)
To complete the connection you must now click the apply button. The apply button will
temporarily save this connection. To make the change permanent you need to click on Tools
(at the top of the page) and select System Commands. At the system commands page, click
on Save All.
4.4.2 Modify an Existing Connection
To modify an existing connection, from the Home screen, click setup and then click the
connection you want to modify. The connections are listed as Connection 1 through
Connection 8.
As a note, if you delete the connection, to make the change permanent you need to click on
Tools (at the top of the page) and select System Commands. At the system commands
page, click on Save All.
4.4.3 Modem Setup
To configure the DSL modulation type, go to the Home screen, Click setup. Under WAN
Setup, select Modem Setup. This will bring up the modem setup screen. Leave the default
value if you are unsure or the DSL/ISP did not provide this information. For most all cases,
this screen should not be modified.
The apply button will temporarily save this connection. To make the change permanent you
need to click on Tools (at the top of the page) and select System Commands. At the system
commands page, click on Save All.

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4.5 Configuring the WLAN
Before you can use the wireless to access Internet or wire LAN via the modem, you must
enable the AP functionality of this modem first. You can enable it following below setting,
Setup ÆWireless ÆEnable AP. Then you can select a channel to use and entry your AP’s
SSID.
Note: you must Restart Access Point for Wireless changes to take effect.
Enable AP: enable/disable AP functionality
Channel: select the working channel this AP will used
SSID: service set ID
Advanced: additional parameter setting

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Following is a description of the different options:
Beacon Period: Beacon is a special broadcast packet sent by AP, the unit is 1024 us
DTIM Period: Delivery Traffic Indication Message (DTIM), if AP have broadcast packets need
to transmit in Beacon packet will include this parameter, to indicates the number of Beacon
intervals between successive DTIMs, default value is 2
RTS Threshold: if the packet size is large than this value, AP will start RTS/CTS transmitted,
default value is 2347 bytes
Frag Threshold: if the packet size is large than this value, AP will fragment this packet, default
value is 2346 bytes
Power Level: adjust the Tx power level, there have 5 levels you can choice, Full, 50%, 25%,
12% and 6%, default is Full power
b/g Mode: select the operation mode of wireless, Mixed (b and g), b only, b+ (22M) and g only,
default is Mixed
Hidden SSID: by default SSID information will include in the beacon packet to notice user, for
security issue you can remove SSID from beacon.
4.6 Configuring the LAN
By default, your gateway has DHCP server (LAN side) enabled. If you already have a DHCP
server running on your network, you must disable one of the two DHCP servers; if you plug a
second DHCP server into the network, you will experience network errors and the network will
not function normally.

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4.6.1 Enable/Disable DHCP
To enable or disable DHCP go to the Home screen, Click setup. Under LAN Setup, select
DHCP Configuration. This will bring up the screen shown in Figure 10.
The Start IP Address is where the DHCP server starts issuing IP addresses. This value must
be greater than the gateways IP address value. For example if the gateways IP address is
192.168.1.1 (default) than the starting IP address must be 192.168.1. 2 (or higher).
The End IP Address is where the DHCP server stops issuing IP addresses. The ending
address cannot exceed a subnet limit of 254. Hence the max value for our default gateway is
192.168.1.254. If the DHCP server runs out of DHCP addresses, users will not get access to
network resources. If this happens you can increase the Ending IP address (to the limit of 255)
or reduce the lease time.
The Lease Time is the amount of time a network user will be allowed connection to the
Gateway with their current dynamic IP address. The amount of time is in units of seconds; the
default value is 3600 seconds (1 hour).
Note: If you change the start or end values, make sure the values are still within the same
subnet as the gateways IP address. In other words, if the gateways IP address is 192.168.1.1
(default) and you change the DHCP start/end IP addresses to be 192.128.1.2/192.128.1.100,
you will not be able to communicate to the gateway if your PC has DHCP enabled.
Figure 10 (DHCP Server configuration)