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 6 Overview of the ATM SPAs
Restrictions
High Availability Features
• Route Processor Redundancy (RPR)
• OSPF Nonstop Forwarding (NSF)
• Stateful Switchover (SSO)
Restrictions
• The ATM SPAs in the Cisco ASR 1000 Series Routers do not support APS reflector and reflector
channel modes. (These modes require a facing path terminating element [PTE], which is typically a
Cisco
ATM switch.)
• The ATM SPAs in the Cisco ASR 1000 Series Routers do not support a data path on the main
interface. Data is only supported in subinterface configuration.
• Link Fragmentation and Interleaving (LFI) processing is not supported.
• Integrated Local Management Interface (ILMI) is not supported.
• Multipoint subinterfaces are not supported in releases prior to Cisco IOS XE Release 2.5.
• Routed Bridge Encapsulation Subinterface Grouping is not supported.
• For best performance, we recommend the following maximums:
Releases Prior to Cisco IOS XE Release 2.5
In releases before Cisco IOS XE Release 2.5, an absolute maximum of 1,000 (1K) configured VCs
per ATM SPA (1,000 [1K] per interface) with the following recommended limitations:
– A recommended maximum number of 1,000 PVCs on all point-to-point subinterfaces for all
ATM SPAs in a SIP.
– A recommended maximum number of 1,024 PVCs using service policies for all ATM SPAs in
a SIP.
Cisco IOS XE Release 2.5 and Later
Beginning in Cisco IOS XE Release 2.5, the following recommended limits are supported:
– 4,000 VCs per interface
– 12,000 VCs per SPA
– 32,000 VCs per system (Cisco ASR 1000 Series Router)
Note These limits are flexible and depend on all factors that affect performance in the router, such
as processor card, type of traffic, and so on.
• A maximum number of 4,000 PVCs configured with Modular QoS CLI (MQC) policy maps.
• In the default configuration of the transmit path trace buffer, the ATM SPA does not support
automatic updates of remote host name and IP address (as displayed by the show controllers atm
command). This information is updated only when the interface is shut down and reactivated (using
the shutdown and no shutdown commands). Information for the received path trace buffer,
however, is automatically updated.

Cisco ASR 1000 Specifications

General

Brand	Cisco
Model	ASR 1000
Category	Network Router
Language	English