Cisco Systems IOS XR Maximum interfaces n Show ospf, Maximum redistributed-prefix n Show ospf

Page 20

Chapter 3 Configuring Additional Router Features

Configuration Limiting

Table 3-6

OSPFv2 and OSPFv3 Configuration Limits and Commands

 

 

 

 

 

 

 

 

 

Default

Absolute

 

 

Feature Limit

 

Maximum

Maximum

Configuration Command

Show Current Settings Command

Description

 

Limit

Limit

(Router Configuration Mode)

(EXEC Mode)

 

 

 

 

 

Maximum number of

255

1024

maximum interfaces n

show ospf

interfaces that can be

 

 

 

 

configured for an

 

 

 

 

OSPF instance

 

 

 

 

 

 

 

 

 

 

Maximum routes

10,000

28,672

maximum redistributed-prefix n

show ospf

redistributed into

 

 

 

Note The maximum number of

OSPF

 

 

 

 

 

 

 

 

redistributed prefixes is

 

 

 

 

 

 

 

 

 

 

displayed only if

 

 

 

 

 

redistribution is configured.

 

 

 

 

 

Maximum number of

32

32

maximum paths n

show running-config router ospf

parallel routes

 

(OSPFv2)

 

 

Note This command shows only

(maximum paths) on

 

 

 

16

 

 

changes to the default value.

Cisco CRS-1s

 

 

 

 

(OSPFv3)

 

 

If the maximum paths

 

 

 

 

 

 

 

 

 

command does not appear,

 

 

 

 

 

the router is set to the default

 

 

 

 

 

value.

 

 

 

 

 

Maximum number of

16

16

maximum paths n

show running-config router ospf

parallel routes

 

 

 

 

Note This command shows only

(maximum paths) on a

 

 

 

 

 

 

changes to the default value.

Cisco XR 12000

 

 

 

 

 

 

 

 

If the maximum paths

Series Router

 

 

 

 

 

 

 

 

command does not appear,

 

 

 

 

 

 

 

 

 

 

the router is set to the default

 

 

 

 

 

value.

 

 

 

 

 

 

Examples

The following subsections provide the following examples:

Maximum Interfaces for Each OSPF Instance, page 3-21

Maximum Routes Redistributed into OSPF, page 3-22

Number of Parallel Links (max-paths), page 3-22

Cisco IOS XR Getting Started Guide

3-20

Image 20
Contents Configuring Additional Router Features ContentsConfiguring Telnet, HTTP, and XML Host Services ConfigureDomain name-server ipv4-address Commit End Show hosts Related Topic Document TitleManaging Configuration History and Rollback Following example, the host services are enabledInstallation and activation of the Manageability Descriptions of the Telnet commandsDisplaying the CommitIDs RP/0/RP0/CPU0router# show configuration commit list Displaying the Configuration History LogShow configuration commit list command display Displaying the Configuration Changes Recorded in a CommitID Previewing Rollback Configuration ChangesConfiguration commit history RP/0/0/CPU0router# show configuration commit changesRP/0/RP0/CPU0router# rollback configuration to Rolling Back the Configuration to a Specific Rollback PointRP/0/RP0/CPU0router# show configuration rollback changes to Loading the Configuration Changes for a Specific CommitID RP/0/RP0/CPU0router# rollback configuration lastSaving and Loading Target Configuration Files Deleting CommitIDsLoading an Alternative Configuration at System Startup Saving the Target Configuration to a FileLoading the Target Configuration from a File Configuring Logging and Logging Correlation Alarm Logging CorrelationLogging Destination Command Global Configuration Mode Logging Locations and Severity LevelsExample Configuring Basic Message LoggingCommand or Action Purpose When a severity level is specified, only Commits the target configuration to the routerRunning configuration Ends the configuration session and returns toConfiguration of system logging Commands used to configure loggingConfiguration of alarm correlation and generating Creating and Modifying User Accounts and User GroupsConfiguring User Accounts Command DescriptionEnd or commit Password 0 7 passwordCreating Users and Assigning Groups Create users, assign users to user groups, create Configuration LimitingModify user groups, and configure remote AAA access Static Route Configuration Limits Default AbsoluteMaximum Configuration Command Show Current Settings Command Exec ModeIS-IS Configuration Limits OSPFv2 and v3 Configuration LimitsLimit Mode Exec Mode Maximum-redistributed-prefixes n Show isis adjacencyMaximum paths n Show running-config router ospf Maximum interfaces n Show ospfMaximum redistributed-prefix n Show ospf If the maximum pathsMaximum Interfaces for Each Ospf Instance BGP Configuration Limits Default Absolute Maximum Configuration CommandFeature Limit Description Maximum-prefix n Show bgp neighbor IPaddressMaximum-paths n Show running-config Maximum pathsRouting Policy Language Line and Policy Limits RP/0/RP1/CPU0router# show rpl maximum Multicast Configuration Limits Limit Global Configuration Mode Exec ModeMpls Configuration Limits Other Configuration Limits
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IOS XR specifications

Cisco Systems IOS XR is an advanced operating system designed specifically for high-performance routers and service provider networks. It serves as the backbone for many of Cisco's high-end routing platforms, enabling service providers to manage their networks with increased efficiency, flexibility, and scalability.

One of the main features of IOS XR is its modular architecture. This allows for the independent operation of various components within the OS, facilitating the deployment of new features and updates without affecting the overall stability of the system. This modularity ensures that service providers can implement rapid changes and enhancements while maintaining service continuity.

Another characteristic of IOS XR is its support for 64-bit architecture, which provides enhanced performance and the ability to manage larger amounts of data. This is particularly beneficial for service providers that deal with high traffic volumes and require robust data processing capabilities. The utilization of 64-bit technology also enables the operating system to utilize memory more efficiently, allowing for greater scalability.

IOS XR incorporates advanced technologies such as Distributed System Architecture (DSA) and Multiple Routing Instances (Merging Routes). DSA allows for the distribution of routing processes across multiple hardware resources, maximizing performance and redundancy. Multiple Routing Instances enable operators to create separate logical routing tables for different services, improving isolation and efficiency in managing network traffic.

The operating system also focuses heavily on security, featuring extensive encryption methods and access controls to safeguard network resources. IOS XR supports various authentication protocols, ensuring secure access to routers and switches. In addition, the OS includes comprehensive logging and monitoring capabilities, allowing network administrators to track activities and respond quickly to potential threats.

Another critical aspect of IOS XR is its adherence to the principles of service-oriented architecture (SOA). This approach permits the development of applications and services that can operate independently, fostering innovation and enabling service providers to tailor their offerings based on customer demands.

Ultimately, Cisco IOS XR is a powerful, reliable operating system that meets the complex needs of modern telecommunications networks. With its focus on modularity, performance, security, and scalability, it enables service providers to deliver high-quality, resilient services to their customers while efficiently managing network resources. As the industry continues to evolve, IOS XR remains a vital tool for those aiming to stay competitive in the ever-changing landscape of networking.