
PMC-Sierra, Inc
FEATURES
QUEUING ALGORITHMS
Receive
• Maintains 64 weighted, bandwidthcontrolled Service Classes (SCs) with per-VC queues.
• Provides round-robin servicing of queues within each SC
• Provides per-channel (VP or VC), perSC, and per-direction congested and maximum queue depth limits
• Provides up to 64K cell buffers
Transmit
• Provides 31 VOs
• Maintains 16 SCs for each virtual output (VO) with per-VC accounting
• Provides per-channel (VP or VC), perSC Queue (SCQ), per-SC, per-VO, and per-direction congested and maximum queue depth limits
• Provides up to 64K cell buffers
CONGESTION MANAGEMENT ALGORITHMS
• Supports EPD and Partial Packet Discard (PPD) for UBR traffic, and as a backup for ABR traffic
• Supports CLP-based cell discard and Explicit Forward Congestion Indicator (EFCI) cell marking
• Supports three congestion limits (as well as EPD, CLP, and EFCI, and/or backpressure) for logical multicast on the transmit side
TYPICAL APPLICATIONS
• A Stand-Alone 622 Mbit/s Switch
• A 5 Gbit/s to 20 Gbit/s Scalable Switch Architecture
• A 2.4 Gbit/s to 80 Gbit/s Scalable Switch Architecture
• A 5 Gbit/s to 320 Gbit/s Scalable Switch Architecture