Field notes

The SAMURAI Blog

Practical writeups on multi-vendor networks, fabric design, change detection, and the engineering behind running 13,000+ endpoints through one pipeline.

Deep Dive2026-05-06

Multi-vendor path tracing: the hard parts

Tracing a packet across IOS, NX-OS, and PAN-OS means reconciling three different ACL syntaxes, two route table formats, and zero shared conventions.

12 min readRead →
Architecture2026-04-22

Correlating 13,000 endpoints without a CMDB

MAC tables, ARP, DHCP snooping, CDP/LLDP, 802.1X, and APIC hosts — stitched together in the right order, they replace a stale spreadsheet.

10 min readRead →
SP1SP2LF1LF2LF3LF4
Operations2026-04-08

APIC clustering: failover without the flapping

Configurable thresholds, cooldown windows, and atomic database operations keep your ACI fabric monitored even when controllers go down.

7 min readRead →
Product2026-03-25

From six browser tabs to one dashboard

The operational pain that started SAMURAI — and the design decisions that let a single pane of glass replace Cisco Prime, Panorama, FMC, and SSH terminals.

6 min readRead →
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Operations2026-03-11

Deploying SAMURAI in air-gapped environments

Docker image pull, offline IEEE OUI database, and TLS certificate pinning — everything you need to run SAMURAI without internet access.

9 min readRead →

Network engineering, every other Tuesday.

Deep dives on multi-vendor architecture, fabric design, change-detection algorithms, and the engineering behind SAMURAI.

~2 emails / month. Unsubscribe any time. No marketing nonsense.