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e. Keep Alive: When on-demand option is not enabled, 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. Set Route: Specify this connection as the default route.
g. MRU: Maximum Receive Unit the ADSL 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 ADSL Providers/ISPs require a larger value.
The minimum MRU value is 128.
h. 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.
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 Save
Settings (at the side of the page). At the system commands page, click on Save All.
4.4.1.4 DHCP Connection Setup
Dynamic Host Configuration Protocol (DHCP) allows the ADSL router 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.
To configure the ADSL router 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 ADSL Provider or ISP will supply these; in this case, the ADSL Provider is