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EtherChannel and LACP Hashing: Why One Flow Fills One Link

EtherChannel and LACP Hashing: Why One Flow Fills One Link

How EtherChannel and LACP hashing works: the inputs used, why a single flow stays on one member link, and how to pick and verify a hash algorithm.

admin admin 2026-10-02
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Multigigabit 2.5G and 5G Ethernet on Existing Cat5e

Multigigabit 2.5G and 5G Ethernet on Existing Cat5e

Multigigabit Ethernet explained: how 2.5G and 5G run over existing Cat5e, cable limits per speed, PoE implications and when to deploy it.

admin admin 2026-10-02
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Linux Network Namespaces and veth Pairs Explained

Linux Network Namespaces and veth Pairs Explained

Create Linux network namespaces, wire them with veth pairs, bridge them and add NAT - the mechanism behind Docker and Kubernetes networking.

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QSFP-DD vs OSFP: Choosing 400G and 800G Form Factors

QSFP-DD vs OSFP: Choosing 400G and 800G Form Factors

QSFP-DD versus OSFP compared: size, thermal headroom, backward compatibility, which switches accept which, and how to choose for 400G and 800G.

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Copper Cable Certification: Permanent Link vs Channel

Copper Cable Certification: Permanent Link vs Channel

Copper certification explained: permanent link versus channel adapters, what insertion loss, NEXT and return loss mean, and how to fix failed runs.

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Structured Cabling: TIA-568 and TIA-606 Rules

Structured Cabling: TIA-568 and TIA-606 Rules

TIA-568 structured cabling rules for network engineers: 90 m permanent link, 100 m channel, bend radius, untwist limits, and TIA-606 labelling.

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Loopback Interfaces: Why Every Network Device Needs One

Loopback Interfaces: Why Every Network Device Needs One

Loopback interfaces explained: why a stable /32 address is the identity of a router, how it drives router IDs, BGP and management, and how to plan the

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BPDU Guard vs Root Guard vs Loop Guard Compared

BPDU Guard vs Root Guard vs Loop Guard Compared

Compare BPDU Guard, Root Guard and Loop Guard: what each protects against, how the port reacts, whether recovery is automatic, and where to deploy the

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BGP Route Flap Damping and Why RIPE-580 Advises Off

BGP Route Flap Damping and Why RIPE-580 Advises Off

BGP route flap damping: penalty, half-life, reuse and suppress limits, why path hunting makes it harmful, and how RIPE-580 changed best practice.

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Cisco ASR 9000 IOS XR show Commands for Troubleshooting

Cisco ASR 9000 IOS XR show Commands for Troubleshooting

A practical set of Cisco ASR 9000 IOS XR show commands for hardware, fabric, interfaces, routing and processes, with what each output tells you.

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