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memory. Once the “lease” expires, the UPSLink will request a renewal of the “lease” time from the
DHCP server. If the DHCP server approves the request for renewal, the UPSLink can continue to
work with the current IP address. If the DHCP server denies the request for renewal, the UPSLink will
start the procedure to request a new IP address from the DHCP server.
Note
: While in DHCP mode, all network-related parameters for the UPSLink are to be configured
automatically, including the DNS servers. If the DNS server is not automatically configured, the user
may manually configure the settings by entering the primary and secondary DNS IP addresses. To
force an automatic configuration of the DNS address, set the primary and secondary DNS IP
addresses to 0.0.0.0 (recommended).
A DHCP sever assigns IP addresses dynamically from an IP address pool, which is managed by
the network administrator. This means that the DHCP client, i.e. the UPSLink, receives a different IP
address each time it boots up. The IP address should be reserved on the DHCP server side to assure
that the user always knows the newly assigned UPSLink address. In order to reserve the IP address
in the DHCP network, the administrator needs the MAC address of the UPSLink found on the label
sticker at the bottom of the UPSLink.
4.1.3. Using PPPoE
PPPoE (Point-to-Point Protocol over Ethernet) is a specification for connecting multiple computer
users on an Ethernet LAN (local area network) to a remote site through a modem or similar device.
PPPoE can be used to multiple users the ability to share ADSL, cable modem, or wireless connection
to the Internet.
To use the UPSLink in PPPoE mode, users require a PPPoE account and the necessary
equipment for PPPoE access (i.e. an ADSL modem). Since the UPSLink provides a PPPoE protocol,
it can access the remote host on the Internet over an ADSL connection. The user will have to set up
the user name and password of the PPPoE account for the UPSLink.
The UPSLink negotiates the PPPoE connection with the PPPoE server whenever it boots up.
During the negotiation, the UPSLink receives the information required for an Internet connection, such
as the IP address, gateway, subnet mask and DNS servers. If the connection is established, the
UPSLink will maintain the connection for as long as possible. If the connection is terminated, the
UPSLink will attempt to make a new PPPoE connection by requesting a new connection.
Note
: While in PPPoE mode, all network-related parameters for the UPSLink are to be configured
automatically, including the DNS servers. If the DNS server is not automatically configured, the user
may manually configure the settings by entering the primary and secondary DNS IP addresses. To
force an automatic configuration of the DNS address, set the primary and secondary DNS IP
