Cisco ASR 1000 Configuration Guide

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Cisco ASR 1000 Series Aggregation Services Routers SIP and SPA Software Configuration Guide
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Chapter 27 Classifying and Scheduling Packets for ASR 1000 Series
Classification and Scheduling Restrictions
Note The above listed new commands for ingress classification and scheduling are documented in the Cisco
IOS Quality of Service Solutions Command Reference guide at the URL
http://www.cisco.com/en/US/docs/ios/qos/command/reference/qos_book.html.
Classification and Scheduling Restrictions
Following are the restrictions pertaining to the classification feature:
• The maximum number of ingress class map templates configured per CC is 62 templates.
• Classification support is not enabled for logical interfaces such as multilink and tunnel interfaces.
• Packet classification CLI is disabled for mulitlink member links.
• Classification CLI cannot be enabled for frame relay subinterfaces.
• Classification is not supported for service SPAs such as WebEx.
Following are the restrictions pertaining to the scheduling feature:
• For clear-channel SPAs such as Ethernet, Serial, POS, and ATM SPAs, excess bandwidth settings
are configured at the physical interface level. For channelized SPAs, the excess bandwidth settings
can be set at the SPA level.
• Configurations built using high capacity CC or ESP, will be restored with best effort when a
low-capacity CC or ESP replaces the high-capacity CC or ESP. Also, any per-CC minimum
bandwidth configuration exceeding its ESI link capacity will be replaced with the corresponding ESI
link’s maximum capacity.
• When configuring the minimum CC bandwidth, the available range is 0 to the minimum carrier-card
bandwidth and ESP bandwidth.
Information About Ingress Classification
The following sections provide details of the Ingress classification feature:
• Ingress Classification Architecture, page 27-3
• Resolving Oversubscription, page 27-5
• Ingress Classification Overview, page 27-5
Ingress Classification Architecture
The Cisco ASR 1000 Series Routers support ingress oversubscription. However, in case of
oversubscription, it is important that the processing of the high-priority packets such as Internet control,
L2 keepalives, signaling protocols, and high-priority data packets is done by the SIP or SPA over the
low-priority packets.
Table 27-3 illustrates the various SPA, SIP, and ESP combinations that cause
oversubcription.

Cisco ASR 1000 Specifications

General

Operating System	Cisco IOS XE
Interfaces	10 Gigabit Ethernet
Power Supply	AC or DC
Number of Total Expansion Slots	Varies by model
Management Port	Console
Redundant Power Supply Supported	Yes
Width	17.5 inches
Memory	Varies by model
Storage	Varies by model
Dimensions (H x W x D)	Varies by model
Weight	Varies by model
Operating Temperature	32°F to 104°F (0°C to 40°C)
Humidity	5% to 95% non-condensing
MTBF	Varies by model
Redundancy	Redundant power supplies, fans, and route processors (depending on model)