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Overview :
Aricent MPLS (Multi Protocol Label Switching) software is an efficient and portable implementation of the label switching capability mechanism as required by industry standards. It supports RSVP extensions for traffic engineering (RSVP-TE), Label Distribution Protocol (LDP) with Constraint-based Routed Label Switched Paths (CR-LSP), MPLS Forwarding Module and Diff-Serv aware signalling. Aricent MPLS can be configured to enable Layer 2 Virtual Private Networks (L2-VPN) services.

Figure 1. Aricent MPLS Architecture
Features supported :
- Configurable as LER/PE or LSR.
- Manageable through SNMP and CLI.
- Software forwarding module included.
- Generic API support for using hardware based MPLS Forwarding Module implementation.
- Conforms to Future Software Architecture for Portability Release (FSAP2), thus ensuring highly portable code, which uses flexible buffer and timer management libraries
- Pre-integrated with Aricent IP and Aricent SNMP.
Generic Signaling Features :
- Conservative Label Retention mode.
- RSVP-TE and CR-LSP tunnel modifications.
- Ethernet and ATM interface.
- Multiple FEC classifications based on,
- IP Address Prefix
- Host Address
RSVP-TE features :
- Traffic Engineering (TE) tunnels.
- Downstream On Demand label distribution mode.
- LSP Pre-emption (Set up and Holding).
- Resource Class Affinity Attribute handling.
- Provides Loop detection using RRO.
- Hello message extensions for rapid detection of node failures.
- RSVP Refresh Overhead Reduction and Reliable Message Delivery.
- Diff-Serv aware E-LSP and L-LSP signaling.
LDP/CR-LDP features :
- Basic and extended Discovery mechanisms.
- Downstream On Demand label distribution mode.
- Ordered and Independent Control.
- Loop detection using path vectors and hop counts.
- Penultimate Hop Popping (PHP).
- Stacked LSPs.
LDP features :
- Downstream Unsolicited label distribution mode.
- Liberal Label Retention Mode.
- VC/VP Merge Capability.
CR-LDP features :
- Constraint-based routed LSP (CR-LSP).
- Diff-Serv aware E-LSP and L-LSP signaling.
- LSP Preemption (Setup and Holding).
L2-VPN features :
- Control Plane support for Virtual Private Wired Services (VPWS)).
- Pseudowire Management and Maintenance.
- Control plane layer 2 service support for Ethernet including VLAN
- Control plane support for collecting and maintaining PW-VC Informational statistics.
Packaging options :
- Aricent MPLS - LM, TE-MIB, LDP, CR-LDP, RSVP-TE and FM
- Aricent MPLS with LDP - LM, TE-MIB, LDP, CR-LDP and FM
- Aricent MPLS with RSVP-TE - LM, TE-MIB, RSVP-TE and FM
- Aricent MPLS with L2-VPN - LM, TE-MIB, LDP, CR-LDP, RSVP-TE and FM
Benefits :
Aricent MPLS reduces the time to market for OEMs and VARs who wish to incorporate the MPLS functionality into their switching/routing devices.
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