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Cisco BPX 8600 Series Installation and Configuration
Release 9.3.10, Part Number 78-11603-01 Rev. D0, July 2001
Chapter 1 The BPX Switch: Functional Overview
Traffic and Congestion Management
Figure 1-8 Virtual Trunking Example
Traffic and Congestion Management
The BPX switch provides ATM standard traffic and congestion management per ATM Forum TM 4.0
using BXM cards.
The Traffic Control functions include:
• Usage Parameter Control (UPC)
• Traffic Shaping
• Connection Management Control
• Selective Cell Discarding
• Explicit Forward Congestion Indication (EFCI)
• Priority Bumping
In addition to these standard functions, the BPX switch provides advanced traffic and congestion
management features including:
• Support for the full range of ATM service types per ATM Forum TM 4.0 by the BXM-T3/E3,
BXM-155, and BXM-622 cards on the BPX Service Node.
• Advanced CoS Management (formerly Fairshare and Opticlass features) Class of Service
management delivers the required QoS to all applications.
–
The BPX provides per virtual circuit (VC) queuing and per-VC-scheduling provided by rate
controlled servers and multiple class-of-service queuing at network ingress.
–
On egress, up to 16 queues with independent service algorithms for each trunk in the network.
• Automatic Routing Management (formerly AutoRoute feature), end-to-end connection
management that automatically selects the optimum connection path based upon the state of the
network and assures fast automatic alternate routing in the event of intermediate trunk or node
failures.
• Cost-Based Routing Management
Cisco
sub-network
Cisco
sub-network
Cisco
sub-network
Cisco
sub-network
Public ATM
Network
ATM-UNI ATM-UNI
ATM-UNI ATM-UNI
Virtual trunk
Leased line
H8227
Leased line
(backup)