Cisco ASR 9000 User Manual

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Cisco ASR 9000 Series Aggregation Services Router Getting Started Guide
OL-28417-02
Chapter CLI Tips, Techniques, and Shortcuts
Displaying System Information with show Commands
Displaying Subnet Mask in CIDR Format
This feature displays IPv4 address subnet mask in Classless Interdomain Routing (CIDR) format instead
of decimal format. The change of format for all show commands may cause backward compatibility
issues. To overcome this problem, the ipv4 netmask-format hit-count command has been implemented
in the IP/CLI component, which maintains the common infrastructure specific to IP related CLIs.
To display the subnet in a prefix length format, you need to configure the ipv4 netmask-format
hit-count command at the global configuration mode:
RP/0//CPU0:router# configure terminal
RP/0//CPU0:router(config)# ipv4 netmask-format bit-count
RP/0//CPU0:router(config)# commit
RP/0//CPU0:router(config)# end
After this command has been configured, the output of the show command forcefully displays the subnet
mask in a prefix length format. Also, you can disable the command by using the no form of the
command.
RP/0//CPU0:router# no ipv4 netmask-format bit-count
RP/0//CPU0:router#
Note This ipv4 netmask-format hit-count command is supported only in the configuration mode.
The following example shows the output of a show running-config command after the ipv4
netmask-format bit-count command has been configured:
RP/0//CPU0:router# show running-config interface mgmtEth 0/RP0/CPU0/0
Mon May 31 23:48:17.453 DST
interface MgmtEth0/RP0/CPU0/0
description Connected to Lab LAN
ipv4 address 172.29.52.70 255.255.255.0

Cisco ASR 9000 Specifications

General

Operating System	Cisco IOS XR
Management	CLI, SNMP, NETCONF, RESTCONF
Type	Edge Router
Interface Support	10G, 40G, 100G, 400G
Power Supply	AC and DC options available
Routing Protocol	BGP, IS-IS, OSPF, EIGRP
Storage	SSD
Operating Temperature	0 to 40°C (32 to 104°F)
Humidity	5 to 95% (noncondensing)
Redundancy	Yes (Power, Fabric, Route Processor)
MTBF	Varies by model (typically > 200, 000 hours)

Summary

Introduction to the Cisco ASR 9000 Series Aggregation Services Router

Management and Security Features

Initial Router Configuration

Explains the initial router configuration process upon booting.

Router Management Interfaces

Selecting and Identifying the Active RSP/DSC

Guides on selecting and identifying the active RSP/DSC for router operation.

Connecting to the Router via Console Port

Provides steps for connecting to the router using the console port for initial setup.

Bringing Up Cisco IOS XR Software on the Router

Prerequisites for Bringing Up IOS XR Software

Bringing Up and Configuring a Standalone Router

Guides on connecting and configuring username/password for a standalone router.

Verifying System After Initial Boot

Provides procedures to verify the router's status after the initial boot.

Configuring General Router Features

Connecting and Communicating with the Router

Explains how to establish communication with the router via CLI.

Logging In to a Router or SDR

Details the process of logging into the router using username and password.

User Access Privileges

Navigating Cisco IOS XR Command Modes

Managing Configuration Sessions

Details the two-stage process for making and committing configuration changes.

Configuring Additional Router Features

Configuring Telnet, HTTP, and XML Host Services

Managing Configuration History and Rollback

Explains how to manage committed configuration changes and perform rollbacks.

Creating and Modifying User Accounts and Groups

CLI Tips, Techniques, and Shortcuts

CLI Tips and Shortcuts

Displaying System Information with show Commands

Explains how to use show commands to display system status and configuration.

Troubleshooting the Cisco IOS XR Software

Basic Troubleshooting Commands

Introduces basic commands for diagnosing connectivity and router operation.

Configuration Error Messages

Explains how to display and interpret configuration error messages.

Memory Warnings in Configuration Sessions

Covers low-memory warnings and how to resolve them.

Troubleshooting Interfaces Not Coming Up

Provides steps to verify and troubleshoot interface status issues.