Configuring A Ppp/Mlppp Link; Authentication - Extreme Networks WM-4T1i WAN Installation And User Manual

Configuring a PPP/MLPPP Link

Typically the last step in configuring a multilink group is to use the following command
to enable it:
enable multilink <groupname>
Any changes to an enabled multilink group will not take effect until the multilink group
is restarted. To restart a multilink group, use the following command:
restart multilink <groupname>
Configuring a PPP/MLPPP Link
All of the PPP configuration commands can be used to configure a single port or to
configure a multilink group, so the following sections for PPP links also apply to
MLPPP links. To configure a PPP/MLPPP link you will need to choose the
authentication and encapsulation for the link.
If you change the configuration of an enabled PPP or MLPPP link, the changes will not
take effect until the link is restarted. To restart a PPP link, use the following command:
restart ports <portlist>
To restart an MLPPP link, use the following command:
restart multilink <groupname>

Authentication

By default, no authentication is configured on PPP links since the WM-4T1i module will
typically be used with leased lines—where both sides of the link are controlled and
authentification is not required. If authentication is needed, the WM-4T1i module
supports either PAP or CHAP. Password authentication protocol (PAP) authenticates a
user as the connection is established by sending a username and password. Challenge
Handshake Authentication Protocol (CHAP) authenticates a user by sending a challenge
across the link. The remote end calculates a response based on the user password and
sends the response back across the link. CHAP is a more secure authentication protocol
than PAP. The link can also be configured to attempt to use CHAP first, followed by
PAP, if CHAP fails.
To configure authentication on a PPP link, use the following command:
WAN Module Installation and User Guide 3-3