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