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FINAL DRAFT —Cisco Confidential
4-19
Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
OL-17502-01
Chapter 4 Configuring Additional Router Features
Configuring Software Entitlement
Configuring Software Entitlement
Certain software and hardware features are enabled using software entitlement, which is a system that
consists of a license manager on a Cisco IOS XR device that manages licenses for various software and
hardware features. The license manager parses and authenticates a license before accepting it. The
software features on the router use the license manager APIs to check out and release licenses. Licenses
are stored in persistent storage on the router.
All core routing features are available for use without any license. In Cisco IOS XR Software
Release
3.7, the following features must be enabled with licenses:
• Layer 3 VPN
• Modular services card bandwidth
Refer to the Cisco ASR 9000 Series Aggregation Services Router System Management Configuration
Guide for more information on configuring software licenses.
Configuration Limiting
The Cisco IOS XR software places preset limits on the configurations you can apply to the running
configuration of a router. These limits ensure that the router has sufficient system resources (such as
RAM) for normal operations. Under most conditions, these preset limits are sufficient.
In some cases, for which a large number of configurations is required for a particular feature, it may be
necessary to override the preset configuration limits. This override can be done only if configurations
for another feature are low or unused.
Caution Overriding the default configuration limits can result in a low-memory condition.
The following sections describe the limits you can configure, default and maximum values, and
commands for configuring and displaying the configuration limits:
• Static Route Configuration Limits, page 4-20
• IS-IS Configuration Limits, page 4-20
• OSPFv2 and v3 Configuration Limits, page 4-21
• Routing Policy Language Line and Policy Limits, page 4-23
• Multicast Configuration Limits, page 4-24
• MPLS Configuration Limits, page 4-25
• Other Configuration Limits, page 4-25