IP Routing
6-10
8000-A2-GB21-30
April 1998
XTACACS Authentication
If the authentication server is an XTACACS server, a Login message will have the
following format:
H The user_name will be the end-user’s user ID as received by the DSLAM in
the type 0 client ID field of the DHCP request.
If the end-user request does not contain a user ID, the corresponding domain
name is used as the user_name.
H The password will be the e1a IP address (gateway address) associated
with this domain in ASCII dotted decimal format.
The passwords configured at the authentication server should not be set with
an expiration time.
H The local_line will be the port number that received the end-user’s
request.
The authentication request is sent to UDP port 49 (as specified in RFC 1492).
If the authentication request is successful, the DSLAM sends a LOGOUT message
to the XTACACS server and the DHCP request is relayed to the DHCP server.
Source-Based Routing
In addition to destination-based routing, the Hotwire DSLAM system also
supports source-based routing. Source-based routing is a security feature for
preventing ES-to-ES routing when they are attached to different RTUs that are
attached to the same DSL card. That is, sourced-based routing can ensure that
all upstream traffic within a service domain is sent to the NSP.
