Cisco ASR 1000 Configuration Guide

27-2
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide
OL-14127-08
Chapter 27 Classifying and Scheduling Packets for ASR 1000 Series
Overview of the Ingress Classification and Scheduling
Overview of the Ingress Classification and Scheduling
The ASR 1000 Series Routers contain a variety of SIPs and SPAs with a combination of low and high
speed interfaces ranging from DS1 to 10 Gbps. Due to a variety of SPAs inserted in the ASR 1000 Series
Router, both the Carrier Card (CC) and the SPA get oversubscribed in the ingress or egress direction.
Currently, all the existing components of the ASR 1000 Series Router such as CC and ESP, prioritize the
traffic in the egress direction. To resolve the oversubscription issue on the ingress side, ingress
classification and scheduling have been introduced in Cisco IOS XE Software, Release 3.1S.
This technology provides the following advantages:
• Classifies and schedules the packets marked as high priority.
• Reduces the latency and jitters for packets (example video and voice) classifed as high priority.
Prerequisites for Ingress Classification and Scheduling
Table 27-2 shows the hardware and software compatibility prerequisites for the ingress classification and
scheduling feature.
Ta b l e 27-2 Hardware and Software Compatibility Matrix for Ingress Classification and Scheduling
Platform Processor Engine
Forwarding Processors,
Carrier Cards, and SPA Types
Supported
New and Modified Commands
Cisco ASR 1000 Series
Router
Cisco IOS XE Release 3.1S
• Route Processor 1
(RP1)
• Route Processor 2
(RP2)
Forwarding Processors
supported
• ESP 5, ESP 10, ESP 20,
ESP 40
SIPs supported
• CC 10
• CC 40
SPAs supported
• POS SPA: OC3, OC12,
OC48, and OC192 flavors
• Channelized SPA: ChT1/
E1, ChT3/ DS0, ChSTM1/
OC3, and ChOC12/ DS0
SPAs
• Clear Channel SPA: T3/
E3 and 12-in-1 SPAs
• Ethernet SPAs: FE, 1 GE,
10 GE SPAs.
• ATM SPAs: OC-3 and
OC-12 flavour SPAs.
Following is the list of new and
modified commands:
• ingress-class-map
• map ip all queue
• map ip dscp-based
• map ip dscp
• map ip precedence-based
• map ip precedence
• map ipv6 all queue
• map ipv6 tc
• map mpls all queue
• map mpls exp
• plim qos input class-map
• show ingress-class-map
• plim qos input map cos {enable
| inner-based | outer-based |
{inner | outer} {cos-value |
cos-range} queue
{strict-priority | 0}}
• hw-module subslot
{slot/subslot} qos input {weight
weight}

Cisco ASR 1000 Specifications

General

Brand	Cisco
Model	ASR 1000
Category	Network Router
Language	English