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标签：ios-xr

Cisco uRPF: Strict vs Loose Mode Anti-Spoofing

Cisco uRPF: Strict vs Loose Mode Anti-Spoofing

Deploy uRPF on Cisco IOS/IOS-XE correctly: strict vs loose mode, allow options, where to apply it, and how to avoid dropping valid asymmetric traffic.

admin admin 2026-09-15
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Cisco IOS-XR Line Card Diagnostics: show diag and Safe OIR

Cisco IOS-XR Line Card Diagnostics: show diag and Safe OIR

Isolate a failing IOS-XR line card: node states, show diag output, hw-module error counters, context dumps, FPD checks and safe OIR steps.

admin admin 2026-09-11
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Cisco IOS XR QoS: Class-Map, Policy-Map and Shaping Examples

Cisco IOS XR QoS: Class-Map, Policy-Map and Shaping Examples

Cisco IOS XR Modular QoS (MQC) on ASR 9000: class-maps, policy-maps with shape, police and priority actions, attachment, verification and troubleshoot

admin admin 2026-09-09
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Cisco IOS-XR Interface CRC Errors: How to Troubleshoot

Cisco IOS-XR Interface CRC Errors: How to Troubleshoot

Diagnose CRC errors on Cisco IOS XR: read show interfaces counters, correlate PCS and optics data, then isolate the faulty cable or module step by ste

admin admin 2026-09-08
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Cisco IOS-XR Input Drops: NP Counter Troubleshooting

Cisco IOS-XR Input Drops: NP Counter Troubleshooting

Cisco IOS XR input drops come from many components, not one queue. Read the interface counters, decode NP counters and capture the dropped packet.

admin admin 2026-09-08
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Cisco IOS XR RPL Route Policy: prefix-set Examples

Cisco IOS XR RPL Route Policy: prefix-set Examples

Understand IOS XR RPL: build prefix-sets with ge/le operators and route-policies to filter BGP routes on ASR 9000, with examples and show rpl verifica

admin admin 2026-09-07
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Cisco IOS XR Commit Replace and Rollback Configuration

Cisco IOS XR Commit Replace and Rollback Configuration

Use commit replace to wipe or rebuild the IOS XR running configuration, and roll back to any labeled commit on ASR 9000, NCS and 8000 routers safely.

admin admin 2026-09-07
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Cisco IOS XR BGP Configuration: iBGP and eBGP Step by Step

Cisco IOS XR BGP Configuration: iBGP and eBGP Step by Step

Configure BGP on Cisco IOS XR step by step: the mandatory address-family requirement, iBGP and eBGP examples, route policies, neighbor groups and veri

admin admin 2026-09-04
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Cisco ASR 9000 Show Commands: version, platform and install

Cisco ASR 9000 Show Commands: version, platform and install

Cisco ASR 9000 IOS XR show-command run book: show version, show platform, show install active vs committed, FPD checks, redundancy and admin scope.

admin admin 2026-09-03
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Cisco ASR 9000 Boot Loop After Upgrade: IOS XR Recovery

Cisco ASR 9000 Boot Loop After Upgrade: IOS XR Recovery

Recover an ASR 9000 line card stuck in a boot loop after an IOS XR upgrade: hw-module bootmedia network reload, FPD auto-upgrade and post-recovery che

admin admin 2026-09-03
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