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3. Configuring the DSL Router
6300-A2-GB20-10 November 2003
3-15
Once the PPP-negotiated IP address is assigned, the ReachDSL Router’s
configuration database will automatically be converted to a new configuration
determined by this IP address and the interface to which it is assigned. However,
any changes made to the interface assignment for the PPP-negotiated IP address
do not take effect until the next time the PPP link is established. This new
configuration will result in the following:
The DSL and/or Ethernet interface(s) are reconfigured.
Routes associated with any interfaces that have been removed are deleted.
An exception to this is when the negotiated IP address is assigned to the
Ethernet interface and the subnet defined by the interface’s IP address is the
same as the one defined by the negotiated IP address.
All dynamic ARP entries are removed. All static ARP entries associated with
the DSL interface and any removed interfaces are deleted. Static ARP entries
for the Ethernet interface are retained if the negotiated IP address is assigned
to the Ethernet interface and the subnet defined by the interface’s IP address
is the same as the one defined by the negotiated IP address.
The negotiated IP address automatically becomes the primary IP address and
the NAPT public IP address.
An active service domain Telnet session is terminated if the interface
associated with the session is removed or the IP address of the interface is
changing.
All DHCP bindings and BOOTP Relay Agent snoop information are removed if
the subnet defined by the Ethernet IP address changes. If the new Ethernet IP
address is still in the same subnet, then only the binding and snoop
information that conflicts with this IP address is removed.
When the negotiated IP
address is assigned to the . . . Then . . .
Ethernet interface of the
ReachDSL Router
The DSL interface will automatically be configured as
unnumbered, and any IP address(es) previously
assigned to the Ethernet and DSL interfaces are
removed. A route for the subnet defined by the
negotiated IP address assigned to the Ethernet interface
will automatically be added to the IP routing table.
DSL interface of the
ReachDSL Router
Any IP address(es) previously assigned to the DSL
interface are removed. The IP address(es) assigned to
the Ethernet interface are left intact unless they conflict
with the negotiated IP address. The IP address used by
the Ethernet interface must be assigned by the user.
DSL interface of the
ReachDSL Router using the
IP Passthrough feature
The negotiated IP address is assigned to the DSL
interface of the DSL Router and served to a passthrough
device on the LAN interface via DHCP. Any IP address
previously assigned to the DSL interface is removed. Any
IP address assigned to the Ethernet interface is left intact
(unless it conflicts with the negotiated IP address). The IP
address used by the Ethernet interface must be assigned
by the user.