Service Providers Knowledge Base

The Cisco Document Team has posted an article. This document describes the creation of Golden ISO (GISO) for upgrades in routers that run Cisco IOS® XR software in eXR versions. Know of something that needs documenting? Share a...

Symptom : When different types of RTs (2-byte AS, 4-byte AS) is configured on RPL & VRF route target, it will be treated as 'additive' extended communities. Conditions: RTs (2-byte AS, 4-byte AS)  Ex:  route-policy TEST-IPv4 if destination in (0.0.0...

BFD Support on Cisco ASR 9000IntroductionThe Problem With ConvergenceBFD For Fast Failure DetectionBFD Protocl OverviewBFD Async ModeBFD Echo ModeBFD Session "Static" and "Dynamic" BFDASR 9000 Distributed BFD Architecure Configuring BFDBFD on Stat...

Behaviour Changed of Dynamic Slow peer. Slow peer detection and processing is not intended for peers that are permanently slow. Peers that are permanently slow should be moved into their own update group by configuring same route-policy for all the ...

 Hi All,For a requirement I had, I wanted to test various regex combinations of AS-PATH Prepend matches using IOSXR RPL. In case, someone else also has a similar situation, I thought of sharing the results.Iosxr regex syntax: ([0-9]+)(_\1)(_\1)(_\1)$...

The Cisco Document Team has posted an article. This document describes Ethernet VPN (EVPN) route types for Layer 2/3 control plane reachability, using BGP L2VPN AFI 25 and SAFI 70. Know of something that needs documenting? Shar...

NSO Expert Insights Series: Foundation to mastering NSOJoin our Cisco NSO Expert Series to discover how the product revolutionizes network management with powerful automation and seamless multi-vendor support. We'll start with the foundational conce...

XR-vm - CLI's Description show context look for any process crash, review time stamp[if it is too old, then no immediate action needed]show redundancyverify if standby state  is Ready and NSR-Readyshow proc cpu | exclude " 0%"look for processes ho...

Introduction Core IssueLoad-balancing Architecture and Characteristics CharacteristicsArchitecture What is a HASH and how is it computed Fields used in ECMP HASH Router ID Bundle in L2 vs L3 scenarios Use case scenarios Case 1 Bundle Ether Attachme...

    NOTE: Starting from January 2025 please refer to this page for IOS XR software suggestions: Recommended Releases for IOS XR Routers   IntroductionIOS XR Numbering SchemeIOS XR Extended Maintenance Release (EMR)Evolution of the "Service Pack" C...

OverviewThis lab provides hands-on experience with the programmability infrastructure of Cisco IOS XR. This new infrastructure allows you to manage a device with great flexibility in terms of models, encodings and transport options. In this lab, you ...

  Introduction This document shows you how to reset a lost password or when you have locked yourself out due to a problematic AAA configuration.   Core Issue Because IOS-XR is substantially different in the way config files are managed, the standard...

IntroductionGolden ISO(GISO)GISO imageBuild a GISOSample executionVerify the content of GISOCreating an USB bootable fileUSB boot in actionQ & A     Introduction This document helps to boot NCS5500 series router through USB devices. This very useful...

Update (March 2018) This document was written at the time when 5.3.4 was about to be released. Hence the SW recommendation for BNG deployment has changed. Please refer to https://supportforums.cisco.com/t5/service-providers-documents/ios-xr-release-...

The Cisco Document Team has posted an article. This document describes how to capture for-us traffic in the Cisco 8000 Series router. Know of something that needs documenting? Share a new document request to doc-ic-feedback@cis...