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Cisco IOS-XE Embedded Packet Capture: EPC Runbook

Cisco IOS-XE Embedded Packet Capture: EPC Runbook

Use IOS-XE Embedded Packet Capture on the device itself: pick EPC vs SPAN, size the buffer, filter, run, inspect and export the PCAP, then debug the c

admin admin 2026-09-11
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Cisco Catalyst SD-WAN Architecture: Planes and Components

Cisco Catalyst SD-WAN Architecture: Planes and Components

Map the Cisco Catalyst SD-WAN planes to vManage, vSmart, vBond and the WAN Edge, follow the onboarding sequence, and see what breaks when each compone

admin admin 2026-09-11
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BGP Communities and AS-Path Filtering on Cisco IOS-XE

BGP Communities and AS-Path Filtering on Cisco IOS-XE

Tag routes with BGP communities on IOS-XE, match them in route-maps, and back the policy with prefix-list and AS-path regex filters that actually hold

admin admin 2026-09-11
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BGP Session Stuck in Idle or Active: Causes and Fixes

BGP Session Stuck in Idle or Active: Causes and Fixes

Seven reasons a BGP session stays in Idle or Active, with the state machine, show commands, TTL, update-source and NOTIFICATION checks that isolate it

admin admin 2026-09-11
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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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Catalyst 9300 StackWise Troubleshooting: Split Stacks

Catalyst 9300 StackWise Troubleshooting: Split Stacks

Diagnose and recover a split Catalyst 9300 StackWise stack: ring versus chain, four split triggers, duplicate-gateway symptoms and a recovery order.

admin admin 2026-09-11
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pyATS and Genie Tutorial: Parse Show Commands and Test State

pyATS and Genie Tutorial: Parse Show Commands and Test State

Use Cisco pyATS and Genie to parse show output into Python dictionaries, learn protocol state, diff baselines and fail tests loudly in CI.

admin admin 2026-09-10
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Cisco IOS NAT: Static NAT, PAT Overload and Port Forward

Cisco IOS NAT: Static NAT, PAT Overload and Port Forward

Configure NAT on Cisco IOS routers: inside/outside interfaces, PAT overload, static NAT, port forwarding, pool NAT, order of operations and troublesho

admin admin 2026-09-09
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Cisco ASA Site-to-Site IPsec VPN CLI Configuration

Cisco ASA Site-to-Site IPsec VPN CLI Configuration

Configure a Cisco ASA LAN-to-LAN IPsec VPN on the CLI: IKEv1 policy, transform set, interesting-traffic ACL, tunnel-group, crypto map and NAT exemptio

admin admin 2026-09-09
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Cisco Nexus NX-OS OSPF Configuration with Examples

Cisco Nexus NX-OS OSPF Configuration with Examples

Configure OSPFv2 on Cisco Nexus NX-OS switches: feature ospf, router-id, per-interface area assignment, timers, redistribution and neighbour verificat

admin admin 2026-09-09
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