Overview of Ingress Classification and Scheduling
The ASR 1000 Series Aggregation Services 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 Aggregation Services Routers 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) classified as high priority.
Prerequisites for Ingress Classification and Scheduling
The following table shows the hardware and software compatibility prerequisites for the ingress classification
and scheduling feature.
Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide, Cisco IOS
XE Everest 16.5
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Classifying and Scheduling Packets for the ASR 1000 Series Aggregation Services Routers
Overview of Ingress Classification and Scheduling