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Junos Troubleshooting: A LAN Where Static Hosts Never Answer

A real-world Junos debugging story: an SRX sees hosts in the ethernet-switching table but not in ARP. Follow the hunt through irb and routing-instance

admin 2026-08-27

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Spine-Leaf Architecture: Modern Data Center Topology

Spine-leaf data center fabric explained: two-hop paths, ECMP, oversubscription math, spine sizing, VXLAN/EVPN overlays and the top cabling mistake.

admin 2026-08-24

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EVPN-VXLAN Data Center Fabric: Design Guide 2026

Design EVPN-VXLAN fabrics: leaf-spine Clos topology, eBGP underlay, symmetric vs asymmetric IRB, multi-tenancy VRFs, multihoming, MTU and multi-site D

admin 2026-08-24

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BGP Network Troubleshooting: Best Practices and Commands

A systematic BGP troubleshooting workflow: verify peering state, update-source, ebgp-multihop, next-hop reachability and prefix filtering on Cisco IOS

admin 2026-08-24

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Cisco BGP Troubleshooting: Common Issues and Fixes

Troubleshoot BGP adjacency failures, wrong AS, duplicate router IDs, hold-timer expiry, RIB failures, slow peers and flapping on Cisco IOS with show c

admin 2026-08-24

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Configure and Verify BFD on Nexus 9000: Step-by-Step

Enable BFD on Cisco Nexus 9000 and verify it end to end: feature bfd, timer maths, OSPF/EIGRP/BGP binding, show bfd neighbors details and down reasons

admin 2026-08-23

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SR-TE LSPs Through a Multi-Domain Network

SR-TE LSPs across a multi-domain OSPF network: BGP-LS TED propagation, colored segment lists, TE and delay metrics, admin groups and PCE-initiated pat

admin 2026-08-22

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Secure BGP with ASPA: Preventing and Fixing Route Leaks

Secure BGP with ASPA and BGP Roles: stop route leaks with OTC, RPKI ROA and ASPA validation, plus Junos and IOS XR configuration, monitoring and migra

admin 2026-08-22

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标签：routing