Juniper JUNOS 10.1 - CONFIGURATION GUIDE 1-2010 Configuration Manual page 460

JUNOS 10.1 Network Interfaces Configuration Guide
The DLCI identifier is a value from 16 through 1022 that defines the Frame Relay
DLCI over which the switch expects to receive multicast packets for replication.
You can configure multicast support only on point-to-multipoint Frame Relay
connections.
If keepalives are enabled, causing the interface to send LMI messages during idle
times, the number of possible DLCI configurations is limited by the MTU selected
for the interface. For more information, see "Configuring Frame Relay Keepalives"
on page 385.
390
Configuring Frame Relay DLCIs
[edit logical-systems logical-system-name interfaces interface-name unit
logical-unit-number]