Implementing IS-IS on Cisco IOS XR Software

How to Implement IS-IS on Cisco IOS XR Software

Controlling LSP Flooding for IS-IS

Flooding of LSPs can limit network scalability. You can control LSP flooding by tuning your LSP database parameters on the router globally or on the interface. This task is optional.

Many of the commands to control LSP flooding contain an option to specify the level to which they apply. Without the option, the command applies to both levels. If an option is configured for one level, the other level continues to use the default value. To configure options for both levels, use the command twice. For example:

RP/0/RP0/CPU0:router(config-isis)# lsp-refresh-interval 1200 level 2

RP/0/RP0/CPU0:router(config-isis)# lsp-refresh-interval 1100 level 1

SUMMARY STEPS

1.configure

2.router isis instance-id

3.lsp-refresh-interval seconds [level {1 2}]

4.lsp-check-interval seconds [level {1 2}]

5.lsp-gen-interval {[initial-wait initial secondary-wait secondary maximum-wait maximum]

...}[level {1 2}]

6.lsp-mtu bytes [level {1 2}]

7.max-lsp-lifetime seconds [level {1 2}]

8.ignore-lsp-errors disable

9.interface type instance

10.lsp-interval milliseconds [level {1 2}]

11.csnp-interval seconds [level {1 2}]

12.retransmit-interval seconds [level {1 2}]

13.retransmit-throttle-interval milliseconds [level {1 2}]

14.mesh-group {number blocked}

15.end or commit

16.show isis interface [type instance level {1 2}] [brief]

17.show isis [instance instance-id]database [level {1 2}] [detail summary verbose] [* lsp-id]

18.show isis [instance instance-id]lsp-log [level {1 2}]

19.show isis database-log [level {1 2}]

Cisco IOS XR Routing Configuration Guide

RC-102

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Cisco Systems IOS XR manual Controlling LSP Flooding for IS-IS, RC-102

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.