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Technology & Architecture
Network Redundancy and High Availability
HA redundancy: 99.99%-99.999%, hardware, LACP/MC-LAG, HSRP/VRRP, BGP multi-homing, geo-redundancy.
April 15, 2026
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Guides, comparisons and news for networking professionals.
HA redundancy: 99.99%-99.999%, hardware, LACP/MC-LAG, HSRP/VRRP, BGP multi-homing, geo-redundancy.
April 15, 2026
DC spine-leaf vs. 3-tier: scalability, latency, resilience, sizing, super-spine, and SONiC disaggregation.
April 15, 2026
ZTNA architecture: Zero Trust principles, comparison with VPN, SDP vs agent-based models, phased deployment, Zscaler/Prisma/Cloudflare.
April 15, 2026
MPLS WAN architecture: L3VPN with VRF/RD/RT, L2VPN/VPLS, Segment Routing, Traffic Engineering, and FRR.
April 15, 2026
Enterprise QoS: DiffServ DSCP, voice/video/ERP classes, LLQ, CBWFQ, WRED, WiFi WMM, and application-aware SD-WAN.
April 15, 2026
Enterprise OSPF design: areas, LSAs, stub/NSSA, route summarization, BFD, authentication, and troubleshooting.
April 15, 2026
Enterprise BGP configuration: eBGP/iBGP, path attributes, communities, BFD, RR, multi-homing, Cisco/Juniper.
April 15, 2026
Spine-leaf EVPN-VXLAN fabric design: eBGP/iBGP underlay, symmetric IRB, ESI multi-homing, and multi-site.
April 15, 2026
VXLAN deployment: L3 underlay, BGP EVPN, ingress replication vs multicast, Cisco/Juniper configuration, and troubleshooting.
April 15, 2026
Design an SD-WAN architecture in 8 steps, from inventory to rollout. Hub-and-spoke, full-mesh, and hybrid topologies, sizing, and vendors.
April 15, 2026
Three-tier campus architecture (access/distribution/core): roles, collapsed core, SD-Access, campus EVPN-VXLAN, and sizing.
April 15, 2026
Juniper Apstra: intent-based automation for multi-vendor EVPN-VXLAN fabrics (Cisco/Arista/SONiC).
April 15, 2026