â– ATM with ATM Adaptation Layer 5 (AAL5) encapsulation
â– ATM with virtual channel connection (VCC) cell relay encapsulation
â– Ethernet (Fast Ethernet, Gigabit Ethernet, 10-Gigabit Ethernet, bridged Ethernet,
bridged Ethernet/VLAN, Ethernet/VLAN)
NOTE: For the purposes of configuring layer 2 services over MPLS, Ethernet interfaces
and bridged Ethernet interfaces function identically, as do Ethernet/VLAN interfaces
and bridged Ethernet/VLAN interfaces. For simplicity, the term Ethernet in this chapter
refers to both Ethernet interfaces and bridged Ethernet interfaces, and the term
Ethernet/VLAN interfaces refers to both Ethernet/VLAN interfaces and bridged
Ethernet/VLAN interfaces.
â– Frame Relay
â– HDLC
Figure 114 on page 510 illustrates layer 2 services being supported over an Internet
service provider’s MPLS network. Customers using Frame Relay, ATM, or other legacy
layer 2 connections to E Series routers are unaware that MPLS tunneling is used.
Figure 114: Layer 2 Services over a Provider’s MPLS Network
Layer 2 Services over MPLS Platform Considerations
To configure layer 2 services over MPLS, you must first configure the underlying
layer 2 service (ATM, bridged Ethernet, Fast Ethernet, Gigabit Ethernet, 10-Gigabit
Ethernet, Frame Relay, or HDLC) and MPLS.
Module Requirements
For information about the modules that support the underlying layer 2 service and
MPLS on ERX14xx models, ERX7xx models, and the ERX310 Broadband Services
Router:
â– See ERX Module Guide, Table 1, Module Combinations for detailed module
specifications.
â– See ERX Module Guide, Appendix A, Module Protocol Support for information about
the modules that support the underlying layer 2 service and MPLS.
For information about the modules that support the underlying layer 2 service and
MPLS on the E120 or E320 Broadband Services Router:
510 â– Layer 2 Services over MPLS Platform Considerations
JUNOSe 11.1.x BGP and MPLS Configuration Guide
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