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A. Command Line Interface
6300-A2-GB20-10 November 2003
A-19
ppp ip {eth1 | dsl1 | passthrough} [mask] [no-dns]
(Continued from previous page)
The passthrough device is selected as the first to broadcast a DHCP DISCOVER. The
DHCP Server feature of the DSL Router will be automatically enabled and the negotiated
IP address will be configured as the range of IP addresses to be served. In addition, the
derived subnet mask (see the description for mask below) and discovered peer IP
address will be configured as the Subnet and Router option values, respectively, provided
by the DHCP server to its clients. Because the DHCP Server is required for passthrough,
selecting this option is restricted by the same mutual exclusion rules that apply to the
DHCP Server feature. For example, since the DHCP Server and the DHCP Relay Agent
features cannot be enabled simultaneously, attempting to select the passthrough option of
this command when the DHCP Relay Agent is enabled will result in rejection of the save
command.
NOTE: Proxy ARP must be enabled on the Ethernet interface for traffic to be properly
forwarded from the passthrough device.
mask – The subnet mask associated with the PPP negotiated IP address. If the mask is
not specified, a mask is calculated that is the longest mask that allows the negotiated IP
address and the IP address of the PPP link peer to reside in the same subnet.
no-dns – The negotiated DNS server address values are not passed to the client when
the DHCP Server feature is enabled. See DHCP Server Commands on page A-14.
ppp authentication {chap | pap | both | none}
Minimum Access Level: Administrator
Command Mode: Config
Specifies the authentication protocol to be negotiated and used in the PPP session. The
ReachDSL Router will always be the authenticated party of this protocol.
NOTES:
– A change to this option does not take effect until the next PPP link establishment.
– To negotiate an authentication protocol, the CHAP host name and secret or PAP
peer ID and password must have already been configured (using the ppp
username and ppp password commands), or the negotiation will operate as
though the default setting (none) has been configured.
chap – During the link establishment phase, the ReachDSL Router will accept the
proposed use of the Challenge Handshake Authentication Protocol (CHAP) only.
pap – During the link establishment phase, the ReachDSL Router will accept the
proposed use of the Password Authentication Protocol (PAP) only.
both – During the link establishment phase, the ReachDSL Router will accept the
proposed use of either CHAP or PAP.
none – During the link establishment phase, the ReachDSL Router will not negotiate to
use any authentication protocol nor will it accept the proposed use of one. This is the
default setting.
Table A-13. PPPoE Client Commands (2 of 3)