Reference material for engineers who design, operate, and audit production infrastructure. Architecture standards, CLI procedures, and audit frameworks — written by WUC engineers from real engagement experience, not vendor marketing.
Library status
12 guides · published
8 guides · in pipeline
5 categories · ip-networking, architecture, storage, network, compute
Real engagements · not vendor docs
Address planning, subnet design, and dual-stack readiness for production networks.
Interactive subnet calculator with live CIDR / dotted-quad parsing, binary visualization, and RFC 1918 classifier. Covers historical IPv4 classes, supernetting, dual-stack readiness, and includes CLI cheat sheets for show ip interface, ip route, and arp across IOS, NX-OS, and JunOS.
Live parser for IPv6 notation with full classification per RFC 4291 (unicast scope), RFC 4193 (ULA), and RFC 6890 (special-purpose registry). Covers SLAAC vs DHCPv6, link-local fe80::/10 behavior, embedded IPv4 patterns, and the dual-stack interop checklist for production migration.
Vendor-neutral engineering reference for design, audit, and capacity decisions.
Standards (EIA-310-E, TIA-942-C, ASHRAE TC 9.9, Uptime Institute), airflow CFM/kW math, the WUC RACK-5 audit framework, the Dual-Rack Network Redundancy Pattern, and 11 engineering diagrams covering AI density, containment ROI, PUE, and Tier availability.
Read field guideCLI references and change-control procedures for production storage fabrics.
CLI reference for creating zones, decommissioning hosts, and swapping HBA WWPNs during hardware replacement on Cisco MDS switches paired with NetApp AFF storage. Covers SIST best practice, show zone pending-diff safety gates, and host-side path verification on Linux, Windows, and ESXi.
130+ read-only show commands across 11 categories — switch identity, environment, system health, processes, interfaces, FLOGI, FCNS, VSAN, zoning, device-alias, fabric-binding. Each command lists what it shows, when to run it, and a production-realistic output captured from MDS 9710 directors.
The complete upgrade procedure for MDS fabric switches: staging kickstart and system images over TFTP (datacenter server or the field-laptop console method), MD5 verification with show version image, the show install all impact gate, the full install all walkthrough with its point of no return, dual-fabric B-then-A sequencing, post-upgrade FLOGI and zoneset verification, rollback, and a director-class supervisor appendix.
Growing a live fabric without an isolated ISL: the three negotiations that fire when E-ports meet (principal, domains, zone merge), the clean-switch principle that makes them boring, trunking E-ports bundled into a SAN port-channel, default-zone deny discipline, show fcns database device-count equality as the pass condition, and the troubleshooting path when a VSAN isolates anyway.
The full migration lifecycle for Windows and Unix file shares: TreeSize Professional pre-migration analysis, annotated ROBOCOPY /COPYALL /B /SEC /MIR with a downloadable seed script, permission-faithful rsync -avHAX --numeric-ids for NFS, seed → delta → cutover sequencing, and BeyondCompare CRC verification that proves source and target actually match before anyone decommissions anything.
VMware never shows the NetApp serial — it shows an NAA identifier that encodes it. This guide breaks down the naa.600a0980 anatomy (OUI + hex-encoded 12-character serial), walks every discovery path — vCenter device backing, esxcli storage vmfs extent list, PowerCLI at scale, RDMs — gives one-line decoders in both directions, and closes the loop with ONTAP lun show -fields serial-hex.
674 commands, searchable. Twelve curated families cover daily administration — 7-Mode and clustered ONTAP side by side, safety-rated read-only / disruptive / destructive, one-click copy — and a live client-side explorer holds the complete inventory (the full vserver, security and metrocluster trees included) with search, family and platform filters.
90+ OneFS commands across 9 families — cluster health, node hardware, SmartConnect networking, SmartPools and protection, AD/LDAP identity, hung-session recovery, performance, SyncIQ and CloudPools, ACLs. Every command is safety-rated read-only, disruptive, or destructive, with representative outputs, four incident runbooks, and a DR failover procedure.
Every SmartPools global setting explained — virtual hot spare, spillover, GNA, L3, and the “apply to manually-managed protection” checkbox that silently erases every override on the cluster. Plus the 2N+1 node-count rule that decides which protection levels are achievable, how to set 3x mirroring, and why a 3-node cluster refuses a SmartFail.
Fabric merges, zone imports, and switch configurations under change-control.
Service profile deployment, datastore expansion, host commissioning under change-control.