User`s guide
128 XSR User’s Guide
Sub-interface Support Chapter 7
Configuring Frame Relay
NOTE
Be sure the same version of the management protocol resides at each end
of the Frame Relay link except for Auto.
Each version includes a slightly different use of the management protocol.
The XSR implements all three LMIs behaving as a DTE as well as auto, none
and default options using the
frame-relay lmi-type command. Auto is the
fastest LMI type.
Sub-interface Support
The XSR implements Frame Relay as a multi-access media in which one
interface to the network - the physical connection - has one or more
destinations, namely, virtual connections. All virtual connections are grouped
with their corresponding physical connection. For this purpose, the XSR
groups one or more PVCs under separate sub-interfaces, which in turn are
associated with a single physical interface.
The
frame-relay interface-dlci command assigns a DLCI to a sub-
interface. The
class command assigns a map class to a DLCI on a sub-
interface.
User Interfaces
This section describes user interface functions including Frame Relay related
configuration, statistics and alarms.
All CLI commands are interpreted immediately by the XSR and become part
of the on-line running configuration. If a parameter in a Frame Relay map is
changed, the change is reflected automatically by Frame Relay devices which
reference this map. But new configuration changes are not saved into the
startup configuration file until you enter the
copy running config startup
config
command to copy the running configuration into the startup
configuration file within Flash memory.