Specifications

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Catalyst 4224 Access Gateway Switch Software Configuration Guide
OL-2031-02
Chapter 10 Traffic Shaping
Distributed Traffic Shaping
DTS provides the following key benefits:
• Offloads traffic shaping from the Route Switch Processor (RSP) to the VIP.
• Supports up to 200 shape queues per VIP, supporting up to OC-3 rates when
the average packet size is 250 bytes or greater and when using a VIP2-50 or
better with eight MB of SRAM. Line rates below T3 are supported with a
VIP2-40.
• Configures DTS at the interface level or subinterface level.
• Shaping based on the following traffic match criteria:
– Access list
– Packet marking
– Input port
– Other matching criteria. For information about other matching criteria,
see the section “Creating a Traffic Class” in the Cisco IOS Quality of
Service Solutions Command Reference, Release 12.2 manual.
• Optional configuration to respond to Frame Relay network congestion by
reducing the shaped-to rate for a period of time until congestion is believed
to have subsided. Supports FECN, BECN, and ForeSight Frame Relay
signaling.
This feature runs on Cisco 7500 series routers with VIP2-40, VIP2-50, or greater.
Configuration
For information on how to configure DTS, see the chapter “Configuring
Distributed Traffic Shaping” in the Cisco IOS Quality of Service Solutions
Command Reference, Release 12.2 manual:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios122/122cgcr/fqos
_c/fqcprt4/qcfdts.htm