Classification And Scheduling Restrictions - Cisco ASR 1000 Series Software Configuration Manual

Classification and Scheduling Restrictions

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 multilink 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
• Configurations built using high capacity CC or ESP, will be restored with best effort when a low-capacity
• When configuring the minimum CC bandwidth, the available range is 0 to the minimum carrier-card
Information About Ingress Classification
The following sections provide details of the Ingress classification feature:
Ingress Classification Architecture
The Cisco ASR 1000 Series Aggregation Services 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. The following table illustrates the various SPA and ESP combinations that cause
oversubscription with SIP-10 installed.
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
configured at the physical interface level. For channelized SPAs, the excess bandwidth settings can be
set at the SPA level.
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.
bandwidth and ESP bandwidth.
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