System Requirements

To implement Layer 2 circuits, your system must meet these minimum requirements:

JUNOS Release 9.1 or later for nonstop routing (NSR) support.
JUNOS Release 8.2 or later for M120 and MX-series routing platform support.
JUNOS Release 7.3 or later for configuring Layer 2 circuits simultaneously over RSVP and LDP LSPs
JUNOS Release 7.1 or later for local interface switching for Layer 2 circuits
JUNOS Release 7.0 or later for specifying a unique maximum transmission unit (MTU) for each Layer 2 circuit
JUNOS Release 6.4 or later for ATM2 IQ interface-based CoS and bandwidth reservation for trunks
JUNOS Release 6.2 or later for Layer 2 circuit trunk mode on T-series and M320 routing platforms and bandwidth reservation for Layer 2 circuits
JUNOS Release 6.1 or later for Automatic Protection Switching (APS) for Layer 2 circuits
JUNOS Release 6.0 or later for Layer 2 circuit traffic engineering, and Frame Relay or ATM control word mapping
JUNOS Release 5.7 or later for ATM cell-relay mode or AAL5 Layer 2 circuits
JUNOS Release 5.6 or later for Frame Relay, HDLC, and PPP-based Layer 2 circuits
JUNOS Release 5.2 or later for Ethernet-based Layer 2 circuits
Five Juniper Networks M-series, MX-series, or T-series routing platforms