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• UNI conformant to ATM Forum UNI Specification V.3.1,
ITU-T I.361 and I.432 specifications
• Support for ATM Forum ILMI 4.0
• Complies with standard Usage Parameter Control (UPC) per
ATM Forum UNI Specification V.3.1, TM 4.0 and ITU-T I.371
• Supports virtual circuit connections (VCCs) and virtual path
connections (VPCs) per ATM Forum UNI Specification V.3.1
and ITU-T I.371
• Connections:
– 16,384 to 32,768 connections per card per UNI Specification
3.1
• Virtual path identifier (VPI)/virtual channel identifier (VCI)
range for VCCs and VPCs: per UNI Specification V.3.1
• Support for VC merging with future software upgrade
(enhanced -E and -EX models only)
Traffic Management
• Per-VC queuing and scheduling
• Per-VC traffic shaping
• Per-VC weighted fair queuing (WFQ)
• Up to 16 classes of service with the following configurable
parameters:
– Separate cell discard threshold for CLP0 and CLP1 cells
– Separate early packet discard (EPD) threshold for CLP0 and
CLP1 cells with future software upgrade (enhanced -E and
-EX models only)
– Maximum Queue Depth (MQD) with partial packet discard
(PPD)
– Service Priority Level (SPL)
– Explicit Forward Congestion Indication (EFCI) threshold
Constant Bit Rate Service
• UPC per ATM Forum UNI Specification V.3.1, TM V.4.0 and
ITU-T I.371
• UPC: Ingress rate monitoring and discarding for:
– Peak Cell Rate (PCR)
– Cell Delay Variation Tolerance (CDVT)
Variable Bit Rate Service
• UPC per ATM Forum UNI Specification V.3.1, TM V.4.0 and
ITU-T I.371
• UPC: Ingress rate monitoring and cell tagging for:
– PCR
– CDVT
– Sustainable Cell Rate (SCR)
– Maximum Burst Size (MBS)
• CLP tagging, enabled, or disabled on a per-virtual circuit (VC)
basis at the ingress side
• Support for both VBR-rt and VBR-nrt
• EPD
ABR Service and Congestion Control
• VS/VD per ATM Forum Traffic Management
Specification V.4.0
• Explicit Rate (ER) stamping
• EFCI tagging monitoring
®
• ForeSight
• Support for non-AAL5 traffic (enhanced -E and -EX models
only)
ABR VS/VD
• VS and VD resource management (RM) cell generation and
termination
• Virtual connection queue (VCQ) assigned to each VC ingress
• VCQ configurable parameters:
– Separate cell discard threshold for CLP0 and CLP1 cells
– EPD threshold
– Maximum queue depth with PPD
– Reserved buffer space for RM cells
• Support for UBR and VBR access
• Interworking with ForeSight
only)
Unspecified Bit Rate Service
• UPC per ATM Forum UNI Specification V.3.1, TM V.4.0 and
ITU-T I.371
• Minimum cell rate configurable and guaranteed
• EPD
Virtual Trunks
• Support for up to 31 virtual trunks per card, each with 16
class-of-service queues
• UNI and NNI option for the interface with public ATM network
• Per virtual trunk traffic shaping
• Reconfigurable maximum trunk rate
®
(enhanced -E and -EX models