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Contents
Chapter 1: Getting Started5
Connecting to Your Wireless Network7
Chapter 2: Viewing Device Status8
Viewing the Dashboard8
Viewing the System Summary9
Viewing Active TCP/IP Services11
Viewing Wireless Statistics11
Viewing Captive Portal Status11
Viewing Site-to-Site IPsec VPN Connection Status11
Viewing the IPsec VPN Server Status12
Viewing PPTP Server12
Viewing Logs12
Viewing Connected Devices13
Viewing Port Statistics14
Viewing the Mobile Network Status14
Chapter 3: Configuring Networking16
Configuring Wired WAN Connections16
Configuring a Mobile Network25
Configuring Global Mobile Network Settings25
Configuring Mobile Network Settings Manually26
Bandwidth Cap Setting27
E-mail Setting
Setting Failover and Recovery28
Configuring LAN Settings29
Changing the Device Management IP Address29
Configuring DHCP Server30
Configuring Bonjour128
Configuring Date and Time Settings128
Backing Up and Restoring the System129
Upgrading Firmware or Changing the Language132
Restarting the Device134
Restoring the Factory Defaults134
The Getting Started page displays the most common configuration tasks on your
device. Click the links on the Web page to go to the relevant configuration page.
This page appears every time you start Devic e Manager. To change this behavior,
check Don’t show on start up.
Initial Settings
1
Change Default
Administrator Password
Launch Setup WizardLaunches the Setup Wizard. Follow the on-screen
Configure WAN SettingsOpens the Internet Setup page to change
Configure LAN SettingsOpens the LAN Configuration page to modify LAN
Configure Wireless
Settings
Displays the Users page where you can change
the administrator password and set up a guest
account. See Configuring User Accounts.
instructions.
parameters. For example, the device host name.
See Configuring Wired WAN Connections.
parameters. For example, the management IP
address. See Configuring LA N Settings.
Open the Basic Settings page to manage the
radio. See Configuring Wireless Networks.
To connect a client device (such as a computer) to your wireless network,
configure the wireless connection on the client device with the wireless security
information that you configured for the router by using the Setup Wizard.
The following steps are provided as an example; you may need to configure your
device differently. For specific instructions, consult the documentation for your
client device.
STEP 1 Open the wireless connection settings window or program for your device.
Your computer might have special software installed to manage wireless
connections, or you might find the wireless connections under the Control Panel in
the Network Connections or Network and Internet window. (The location
depends on your operating system.)
1
STEP 2 Enter the network name (SSID) that you chose for your network in the Setup
Wizard.
STEP 3 Choose the type of encryption and enter the security key that you specified in the
Setup Wizard.
If you did not enable security (not recommended), leave the wireless encryption
fields that were configured with the security type and passphrase blank.
STEP 4 Verify your wireless connection and save your settings.
To ensure that data and statistics are frequently updated on Status pages, choose
a refresh rate from the Refresh Rate drop-down list.
Viewing the Dashboard
2
Choose Status > Dashboard to view a snapshot of the configuration of your
device. The Dashboard page displays information about your device’s firmware
version, CPU and memory utilization, error-logging settings, LAN, WAN, wireless,
site-to-site IPsec VPN, and PP TP VPN server settings.
To modify the information display ed, click the details link to go t o the configuration
page for the section. For more information about managing the settings displayed
on the Dashboard page, see:
•Configuring Log Settings
•Configuring Basic Site-to-Site IPsec VPN
•Configuring LAN Settings
•Configuring Wired WAN Connections
•Configuring Basic Wireless Settings
From the Refresh Rate drop-down list, choose the rate at which the latest
statistics and parameter values are refreshed on the dashboard.
The Dashboard page also displays an interactive view of your device’s back panel
when you click Show Panel View. Mouse-over each port to view port connection
information.
Choose Status > System Summary to view details of your device properties,
network settings across IP address modes, firewall, wireless and VPN settings.
Click Refresh to see the latest information.
Click the underlined link to go to the related configuration window. For example, to
modify the LAN IP address, click LAN IP. The LAN Configuration window is
displayed.
The System Summary page displays information in the following sections:
System Information
•Firmware Version—Current software version that the device is running.
•Firmware MD5 Checksum—The message-digest algorithm used to verify
the integrity of files.
2
•Locale—The language installed on the router.
•Language Version—The version of the installed language pack. The
language pack version should be compatible with the currently installed
firmware. In some cases, an older language pack may be used with a newer
firmware image. The router checks the language pack version to see if it is
compatible with the current firmware version.
•Language MD5 Checksum—The MD5 checksum of the language pack.
•CPU Model—Chipset of CPU currently used.
•Serial Number—Serial number of the device.
•System Up Time—Length of time that the system has been running.
•Current Time—Time of day.
•PID VID—Product ID and version ID of the device.
IPv4 Configuration
•LAN IP—LAN IP address of the device.
•WAN IP—WAN IP address of the device. To release the current IP address
and obtain a new one, click Release or Renew.
•Gateway—IP addr ess of the gateway to which the device is connected (for
For more information on configuring VPN server connections and user accounts,
see Configuring Basic Site-to-Site IPsec VPN and Configuring PPTP.
Viewing Active TCP/IP Services
Choose Status > Active TCP/IP Services to view IPv4 and IPv6 TCP/IP
connections that are active on your device. The Active Service List section for IPv4
and IPv6 displays the protocols and the services that are active on the device.
Viewing Wireless Statistics
Choose Status > Wireless Statistics to view wireless statistical data for the
device radio. In the Refresh Rate field, choose the rate at which you want the latest
statistics to be displayed.
2
To show the bytes in kilobytes (KB) and the numerical data in rounded-up values,
check the Show Simplified S tatistic Data check box and click Save. By default,
byte data is displayed in bytes and other numerical data is displayed in long form.
To reset the wireless statistics counters, click Clear Count. The counters are reset
when the device is rebooted.
Viewing Captive Portal Status
Choose Status > Captive Portal to view information about the connected Captive
Portal users. For more information about configuring Captive Portals on your
device, see Configuring Captive Portal.
Viewing Site-to-Site IPsec VPN Connection Status
Choose Status > Site-to-Site IPsec VPN to view the connection status of active
site-to-site IPsec VPN policies on the device. For information on configuring VPN
policies, see Configuring Basic Site-to-Site IPsec VPN.
To change the rate at which latest and real-time connection status is displayed,
choose a refresh rate from the Refresh Rate drop-down list.
By default, byte data is displayed in bytes and other numerical data is displayed in
long form. To show the bytes in kilobytes (KB) and the numerical data in roundedup form, check the Show Simplified Statistic Data box and click Save.
To terminate an active VPN connection, click Disconnect.
Viewing the IPsec VPN Server Status
Choose Status > IPsec VPN Server to view a list of your IPsec VPN connections
and the duration of the connection. For more information about configuring IPsec
VPN connections, see Configuring IPsec VPN Server.
2
Viewing PPTP Server
Choose Status > PPTP Server to view a list of your PPTP VPN connections, the
duration of the connection, and the actions you can perfom on this connection. For
more information about configuring PPTP VPN connections, see Configuring
PPTP.
Viewing Logs
Choose Status > View Logs. Click Refresh Logs, to display latest log entries.
To filter logs or specify the severity of logs to display, check the boxes next to the
log type and click Go. Note that all log types above a selected log type are
automatically included and you cannot deselect them. For example, checking the
Error check box automatically includes emergency, alert, and critical logs in
addition to error logs.
The event severity levels are list ed from the highest severity to the lowest severity ,
as follows:
•Emergency—Messages about events such as a system crash.
•Alert—Messages about conditions that require immediate correcti ve action.
•Critical—Messages for when the system is in a critical condition.
•Error—Messages about conditions that are not critical but require corrective
action.
•Warning—System warnings.
•Notification—Messages about normal but significant conditions that may
require attention.
•Inf ormational—Messages about device information.
•Debugging—Detailed information about an event.
To delete all entries in the log window, click Clear Logs.
To save all log messages from the device to the local hard drive, click Save Logs.
To specify the number of entries to show per page, choose a number from the
drop-down menu.
To move between log pages, use the page navigation buttons .
Viewing Connected Devices
The Connected Devices page displays information about the active client
devices connected to your router. To view connected devices, choose Status >
Connected Devices.
To specify the types of interfaces to display, select a value from the Filter dropdown menu:
•All—All devices connected to the router.
•Wireless—All devices connected through the wireless interface.
•Wired—All devices connected through the Ethernet ports on the router.
•WDS—All Wireless Distribution System (WDS) devices connected to the
router .
IPv4 ARP Table displays information from other routers that have responded to
the device’s Address Resolution Protocol (ARP) request. If a device does not
respond to the request, it is removed from the list.
IPv6 NDP Table displays all IPv6 Neighbor Discovery Protocol (NDP) devices
connected to the device’s local link.
The Port Statistics page displays detailed port activity.
To view port statistics, choose Status > Port Statistics.
To refresh the page at regular intervals, choose a refresh rate from the Refresh
Rate drop-down list.
To show the bytes in kilobytes (KB) and the numerical data in rounded-up form,
check the Show Simplified Statistic Data box and click Save. By default, byte
data is displayed in bytes and other numerical data is displayed in long form.
To reset the port statistics counters, click Clear Count.
The Port Statistics page displays this information:
2
InterfaceName of the network interface.
PacketNumber of received/sent packets.
ByteNumber of received/sent bytes of information per second.
ErrorNumber of received/sent packet errors.
DroppedNumber of received/sent packets that were dropped.
MulticastNumber of multicast packets sent over this radio.
CollisionsNumber of signal collisions that occurred on this port. A
collision occurs when the port tries to send data at the
same time as a port on another router or computer that is
connected to this port.
Viewing the Mobile Network Status
The mobile network statistics about the mobile 3G/4G network and
communication device (dongle) configured on the device.
To view the mobile network status, choose Status > Mobile Network. The
following information is displayed:
•Connection—Device connected to the guest network.
•Internet IP Address—IP address assigned to the USB device.
Configuring WAN properties for an IPv4 network differs depending on which type
of Internet connection you have.
Configuring DHCP (Automatic Configuration)
If your Internet Service Provider (ISP) uses Dynamic Host Control Protocol (DHCP)
to assign you an IPaddress, you receive an IP address that is dynamically
generated each time you log in.
3
To configure DHCP WAN settings:
STEP 1 Choose Networking > WAN.
STEP 2 From the Internet Connection Type drop-down list, choose Automatic
Configuration - DHCP.
STEP 3 From the DNS Server Source drop-down list, choose one of the following ways to
set the DNS server address:
•If y ou alr eady have DNS server addresses from your ISP, choose Use these
DNS Servers, and enter the primary and secondary addresses.
•If you do not have DNS server addresses from your ISP, choose Get
Dynamically from ISP.
•To use the DNS servers provided by OpenDNS (208.67.222.222,
208.67.220.220) to resolve your web addresses, choose Use OpenDNS.
STEP 1 Choose Networking > WAN.
STEP 2 From the Internet Connection Type drop-down menu, choose Static IP.
STEP 3 Enter this information:
3
Configuring Static IP
If your ISP assigned you a permanent IP address, perform the following steps to
configure your WAN settings:
Internet IP AddressIP address of the WA N port.
Subnet maskSubnet mask of the WAN port.
DNS Server SourceThe DNS server address. If you already have DNS
server addresses from your ISP, choose Use these
DNS Servers, and enter the primary and secondary
addresses in the Static DNS 1 and Static DNS 2
fields.
To use the DNS servers provided by OpenDNS
(208.67.222.222, 208.67.220.220) to resolve your
web addresses, choose Use OpenDNS.
Default GatewayIP address of the default gateway.
STEP 4 Click Save.
Configuring PPPoE
To configure the Point-to-Point Protocol over Ethernet (PPPoE) settings:
STEP 1 Choose Networking > WAN.
STEP 2 From the Internet Connection Type drop-down menu, choose PPPoE.
STEP 3 Select a PPPoE profile or click Configure Profile to create a new profile.
STEP 4 On the PPPoE Profiles page, enter the following information (you might nee d to
contact your ISP to obtain your PPPoE login information):
UsernameThe username assigned by the ISP.
PasswordThe password assigned by the ISP.
DNS Server SourceThe DNS server address. If you already have DNS
server addresses from your ISP, choose Use these
DNS Servers, and enter the primary and secondary
addresses in the Static DNS 1 and Static DNS 2
fields.
To get DNS server addresses from your ISP,
choose Get Dynamically from ISP.
To use the DNS servers provided by OpenDNS
(208.67.222.222, 208.67.220.220) to resolve your
web addresses, choose Use OpenDNS.
Connect on DemandSelect this option if your ISP charges based on the
amount of time that you are connected. When you
select this option, the Internet connection is on only
when traffic is present. If the connection is idle—
that is, no traffic is flowing—the conne ction is
closed. If you click Connect on Demand, enter the
number of minutes after which the connection
shuts off in the Max Idle Time field.
Keep AliveWhen you select this option, the Internet
connection is always on. In the Redial Period field,
enter the number of seconds after which the
device attempts to reconnect if it is disconnected.
Authentication TypeAuto-negotiation—The server sends a
configuration request specifying the security
algorithm set on it. The devic e then sends back
authentication credentials with the security type
sent by the server.
PAP—Password Authentication Protocol (PAP)
used by Point-to-Point Protocol to connect to the
ISP.
CHAP—Challenge Handshake Authentication
Protocol (CHAP) requires that both the client and
server know the plaintext of the secret to use ISP
services.
MS-CHAP or MS-CHAPv2—The Microsoft
version of CHAP used to access ISP services.
STEP 5 Click Save.
Configuring PPTP
To configure the PPTP settings:
STEP 1 Choose Networking > WAN.
STEP 2 From the Internet Connection Type drop-down menu, choose PPTP.
STEP 3 Enter this information:
Internet IP AddressIP address of the WA N port.
Subnet maskSubnet mask of the WAN port.
Default Gateway IP address of the default gateway.
PPTP ServerIP address of the Point-To-Point Tunneling Protocol
server.
UsernameThe username assigned to you by the ISP.
PasswordThe password assigned to you by the ISP.
Connect on DemandSelect this option if your ISP charges based on the
amount of time that you are connected. When you
select this option, the Internet connection is on only
when traffic is present. If the connection is idle—
that is, no traffic is flowing—the conne ction is
closed. If you click Connect on Demand, enter the
number of minutes after which the connection
shuts off in the Max Idle Time field.
Keep AliveWhen you select this option, the Internet
connection is always on. In the Redial period field,
enter the number of seconds after which the
device attempts to reconnect, if it is disconnected.
Authentication TypeChoose the authentication typ e:
Auto-negotiation—The server sends a
configuration request specifying the security
algorithm set on it. The devic e then sends back
authentication credentials with the security type
sent earlier by the server.
PAP—The device uses the Password
Authentication Protocol (PAP) to connect to the ISP.
CHAP—The device uses the Challenge Handshake
Authentication Protocol (CHAP) when connecting
with the ISP.
MS-CHAP or MS-CHAPv2—The device uses
Microsoft Challenge Handshake Authentication
Protocol when connecting with the ISP.
Service NameEnter a name for the new PPTP service.
MPPE EncryptionCheck the Enable check box to enable Microsoft
Point-to-Point Encryption for the PPTP connection.
DNS Server SourceThe DNS server address. If you already have DNS
server addresses from your ISP, choose Use these
DNS Servers, and enter the primary and secondary
addresses in the Static DNS 1 and Static DNS 2
fields.
To get DNS server addresses from your ISP,
choose Get Dynamically from ISP.
To use the DNS servers provided by OpenDNS
(208.67.222.222, 208.67.220.220) to resolve your
web addresses, choose Use OpenDNS.
Configuring L2TP
To configure L2TP settings:
STEP 1 Choose Networking > WAN.
STEP 2 From the Internet Connection Type drop-down menu, choose L2TP.
STEP 3 Enter this information:
Internet IP AddressThe IP address of the WAN port.
Subnet maskThe subnet mask of the WAN port.
Default GatewayThe IP address of the default gateway.
L2TP ServerThe IP address of the L2TP server.
VersionThe L2TP version that you want to use. If you select
version 3, enter the vendor ID, and the virtual circuit
ID.
Cookie LengthThe size of the cookie in the L2TP v3 data packet,
Vendor I DThe vendor ID contained in the AVP encoding
format for L2TP.
To use the IETF-adopted attribute values in the A VP,
select Standard.
To implement Cisco’s L2TP extensions and private
attribute values, select Cisco.
Virtual Circuit IDThe identifier for the Layer 2 circuit over which
L2TP data packets are carried. This information is
required if you selected Cisco as the Vendor ID for
L2TP v3.
UsernameEnter your username assigned to you by the ISP.
PasswordEnter your password assigned to you by the ISP.
Connect on DemandSelect this option if your ISP charges based on the
amount of time that you are connected. When you
select this option, the Internet connection is on only
when traffic is present. If the connection is idle—
that is, no traffic is flowing—the conne ction is
closed. If you click Connect on Demand, enter the
number of minutes after which the connection
shuts off in the Max Idle Time field.
Keep AliveWhen you select this option, the Internet
connection is always on. In the redial period field,
enter the number of seconds after which the
device attempts to reconnect if it is disconnected.
Authentication TypeAuto-negotiation—The server sends a
configuration request specifying the security
algorithm set on it. The devic e then sends back
authentication credentials with the security type
sent by the server.
PAP—Password Authentication Protocol (PAP) is
used to connect to the ISP.
CHAP—Challenge Handshake Authentication
Protocol (CHAP) is used to connect to the ISP.
MS-CHAP or MS-CHAPv2—Microsoft Challenge
Handshake Authentication Protocol is used to
connect to the ISP.
Service NameEnter a name for the new L2TP service.
MPPE EncryptionCheck Enable to enable Microsoft Point-to-Point
Encryption for the L2TP connection.
DNS Server SourceThe DNS server address. If you already have DNS
server addresses from your ISP, choose Use these
DNS Servers, and enter the primary and secondary
addresses in the Static DNS 1 and Static DNS 2
fields.
To get DNS server addresses from your ISP,
choose Get Dynamically from ISP.
To use the DNS servers provided by OpenDNS
(208.67.222.222, 208.67.220.220) to resolve your
web addresses, choose Use OpenDNS.
STEP 4 Click Save.
Configuring Optional Network Settings
To configure optional settings:
STEP 1 In the Optional Settings section, configure the f ollowing settings:
MTUMaximum transmission unit (MTU) is the size of the
largest packet that can be sent over the network.
Unless a change is required by your ISP, we
recommend that you choose Auto. The default
MTU size is 1500 bytes.
If your ISP requires a custom MTU setting, choose
Manual and enter the MTU size.
SizeThe custom MTU size. The standard MTU value for
Ethernet networks is usually 1500 bytes. For
PPPoE connections, the value is 1492 bytes.
Untagged VLANCheck the box to enable VLAN tagging. When
enabled (the default), all traffic is tagged with a
VLAN ID.
By default, all traffic on the device uses VLAN 1, the
default untagged VLAN. All traffic is untagged until
you disable the untagged VLAN, change the
untagged traffic VLAN ID, or change the VLAN ID.
Untagged VLAN IDA number between 1 and 4094 for the untagged
VLAN ID. The default is 1. Traffic on the VLAN that
you specify in this field is not tagged with a VLAN
ID when forwarded to the network.
VLAN 1 is the default untagged VLAN.
AP Management VLANThe VLAN associated with the IP address you use
to access the device when it is configured as an
access point.
STEP 2 Click Save.
If you create additional VLANs, for security
reasons, choose a value that corresponds with the
VLAN configured on other switches in the network.
You may need to change the management VLAN to
limit access to Device Manager.
Choose Networking > WAN > Mobile Network to configure to configure the
device to connect to a Mobile Broadband USB modem that is connected to its
USB interface.
Configuring Global Mobile Network Settings
To configure global settings for supported USB devices:
STEP 1 Connect the USB modem. If the modem is supported, it is automatically detected
and appears on the Mobile Network page.
STEP 2 Select Auto or Manual connection mode. Ethernet Connection Recovery works
only if the Connect Mode is set to Auto.
3
•To enable your modem to establish a connection automatically, select Auto
mode. If you select Auto, set a Connect on Demand time or select Keep Alive.
Connect on Demand terminates the Internet connection after it is inactive for
the period of time specified in the Max Idle Time field.
If your Internet connection is terminated due to inactivity, the modem
automatically reestablishes a connection when a user attempts to acces s
the Internet. In the Max Idle Time field, enter the number of minutes of idle
time that can elapse before the Int ernet connection terminat es. Select Keep
Alive to keep the connection active at all times.
•To connect or disconnect your modem connection manually, select Manual
mode.
The device displays the current modem connection status that includes initializing,
connecting, disconnecting, or disconnected.
STEP 3 Verify that the Card Status field shows your mobile card is Connected.
STEP 1 Enter information in the following fields:
3
Configuring Mobile Network Settings Manually
To change mobile netw ork parameters in the Mobile Network Setup area, click
the Manual radio button. The device automatically detects supported modems
and lists the appropriate configuration parameters. To override global parameters,
select Manual.
FieldDescription
Access point Name
(APN)
Dial NumberDial number provided by your mobile network service
Username
Password
SIM CheckSIM card check enable or disable.
SIM PINPIN code associated with your SIM card. This field is
Server NameName of the server for the Internet connection (if
AuthenticationAuthentication used by your service provider. The value
Internet network that the mobile device is connecting to.
Enter the access point name provided by your mobile
network service provider. If you do not know the name
of the access p o int, contact your service provider.
provider for the Internet connection.
User name and password provided by your mobile
network service provider.
only displayed for GSM SIM cards.
You can modify the SIM PIN in either Auto or Manual
mode.
provided by your service provider).
can be changed by choosing the authentication type
from the drop-down list. The default is Auto. If you do
not know which type of authentication to use, select
Auto.
Server TypeThe most commonly available type of mobile data
service connection based on your area service signal. If
your location supports only one mobile data service,
you can limit your pref err ed option, reducing connection
setup times. The first selection always searches for
HSPDA/3G/UMTS service and switches automatically
to GPRS when it is available.
LTE ServiceL ong-term E volution (LTE) Service setting. Auto chooses
a signal based on the area service signal. 4G only
searches for only 4G signals. 3G only searches for only
3G signals.
Bandwidth Cap Setting
The device monitors the data activity across the mobile network link and when it
reaches a given threshold, sends a notification.
To enable or disable Bandwidth Cap Tracking and set the limits:
STEP 1 Click Enabled or Disabled.
STEP 2 Select the Monthly Renewal Date fr om the dr op-down list to indicate which day of
the month the bandwidth cap is reset .
STEP 3 In the Monthly Bandwidth Cap field, enter the maximum amount of data in
megabytes that is allowed to pass before the device takes an action, such as
sending an email to an administrator.
E-mail Setting
When the bandwidth data limit is reached, an email message can be sent to the
administrator. To set up the target email address, see Configuring Log E-Mailing.
When enabled by checking the box, email is sent when:
•Mobile network usage has exc eeded a given percentage.
•The device fails over to the backup pathway and recovers.
STEP 1 Choose Networking > WAN > Failover & Recovery, to display the Failover &
STEP 2 Select Enable Failover to 3G WAN to enable the mobile network link and set it to
3
•At every interval specified while a mobile network link is active.
Set t ing Failover and Recovery
While both Ethernet and mobile network links are available, only one connection
can be used to establish a W AN link, at a time. When one W AN connection fails, the
device attempts to establish a connection on another interface. This feature is
called Failover. When the primary WAN connection is restored, it reverts to the
original path and ends the backup connection. This feature is called Recovery.
Recovery window.
failover from the Ethernet link. When the Ethernet W AN link is not active, the device
attempts to enable the mobile network link on the USB interface. (If failover is not
enabled, the mobile network link is always disabled.)
STEP 3 Select Enable Recovery back to Ethernet WAN to enable the link to return to the
Ethernet link, dropping the mobile network link. The Connect Mode accessed
through WAN > Mobile Network must be set to Auto to use Ethernet WAN
connection recovery.
STEP 4 In the Failover Check Interval field, enter the fr equency (in seconds) with which the
device must attempt to detect the physical connection or presence of traffic on
the mobile network link. If the link is idle, the device attempts to ping a destination
at this interval. If there is no reply t o the ping pack et, the device assumes the link is
down and retries the Ethernet WAN interface.
STEP 5 In the Recovery Check Interval field, enter the frequency (in seconds) with which
the device must attempt to detect the physical connection or presence of traffic
on the Ethernet WAN link. If the link is idle, the device attempts to ping a
destination at the interval. If there is a reply to the ping pa cket, the device assumes
the link is up and attempts to disable the mobile network link and enable the
Ethernet WAN link.
STEP 6 Click Switch back to Ethernet immediately when Ethernet is available or click
Switch back to Ethernet in a specific time range and enter the start and end time
for the range.
STEP 7 In the Connection Validation Site field, choose the site from which to perform
failover validation. Use the next hop gateway (by default the device pings the
default gateway) or choose a custom site and enter the site IPv4 or IPv6 address.