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LOG

Cisco IOS XR Configuration Management: Commit and Rollback

Cisco IOS XR Configuration Management: Commit and Rollback

Master IOS XR configuration management: target versus running config, commit confirmed, rollback to a commit ID, load replace and diffing changes.

admin admin 2026-10-02
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Switch ASICs: Trident, Tomahawk and Silicon One

Switch ASICs: Trident, Tomahawk and Silicon One

What decides switch behaviour when the ports look identical: Broadcom Trident and Tomahawk versus Cisco Silicon One, buffer depth, programmability and

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Microbursts and Switch Buffer Sizing in the Data Center

Microbursts and Switch Buffer Sizing in the Data Center

Microbursts explained: millisecond congestion, why average utilisation hides them, how shared buffers behave under contention, and what to tune.

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Console Servers and Out-of-Band Management Design

Console Servers and Out-of-Band Management Design

Design an out-of-band management network: console server sizing, dual power, separate paths, static addressing and the access controls that matter.

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5G and LTE Branch Failover WAN Design

5G and LTE Branch Failover WAN Design

Design 5G and LTE branch failover: cellular as backup or primary, dual SIM, VRRP router redundancy, OOBM and the metrics that control failover.

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LoRaWAN Gateway Deployment: LNS, RF and Backhaul

LoRaWAN Gateway Deployment: LNS, RF and Backhaul

Deploy a LoRaWAN gateway properly: packet forwarding versus embedded network server, antenna height and cabling, channel capacity and backhaul choices

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Catalyst 9300 StackWise Virtual Dual-Active Detection

Catalyst 9300 StackWise Virtual Dual-Active Detection

StackWise Virtual on Catalyst 9300 and 9600: how the virtual switch link works, why dual-active detection is mandatory, and the configuration steps.

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iPerf3 Throughput Testing: A Repeatable Methodology

iPerf3 Throughput Testing: A Repeatable Methodology

Run iperf3 properly: server setup, window sizing, parallel streams, omit slow start, reverse mode, UDP tests and the traps that produce wrong numbers.

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ARP Spoofing in the Enterprise: Detection and Prevention

ARP Spoofing in the Enterprise: Detection and Prevention

How ARP spoofing enables man-in-the-middle attacks, how Dynamic ARP Inspection validates ARP against the DHCP snooping database, and how to deploy it.

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VLAN Hopping: Double Tagging and Switch Spoofing

VLAN Hopping: Double Tagging and Switch Spoofing

How VLAN hopping works: double tagging and switch spoofing attacks explained, why native VLANs and DTP make them possible, and the hardening steps.

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