The Default GatewayNetwork Engineering

The Default Gateway — carrier-grade network engineering and ISP consulting in South Africa

Abstract visualisation of a fibre network topology with illuminated routing nodes

$ traceroute to reliable networks

Carrier-grade network engineering for ISPs and businesses

We fix underperforming ISP networks, architect BGP and core routing, build ISPs from ASN to first subscriber — and apply the same engineering discipline to business site networks across South Africa.

Book a network auditExplore services
Years in carrier & ISP networks
15+Years in carrier & ISP networks
Networks audited & remediated
40+Networks audited & remediated
Core uptime targets designed to
99.99%Core uptime targets designed to
Escalation response for retainers
<15 minEscalation response for retainers

Trusted by

Operators who put their network in our hands

We work alongside South African ISPs and businesses on routing, capacity and day-to-day operations.

What we do

Two pillars, one engineering standard

ISP and carrier-level network services are our differentiator. SME and site networks get the same rigour, documentation and monitoring discipline.

BGP & core routing

Transit, peering, IXP presence and internal route policy engineered to converge predictably.

Network health audits

Measurement-first diagnosis of underperforming ISP networks, with a prioritised fix list.

Full ISP builds

ASN and IP resources to service edge, billing integration and first paying subscriber.

NOC & monitoring

Observability stacks, actionable alerting, runbooks and SLA reporting your team can operate.

Segmentation & firewalls

VLAN design and least-privilege policy for business sites, branches and warehouses.

Wi-Fi, fibre & voice

Structured cabling, splicing, validated Wi-Fi design, IP CCTV and VoIP that actually holds up.

Pillar 01

ISP & Carrier-Level Network Services

For ISPs, FNOs and WISPs that need senior routing and operations engineering — whether the network is underperforming today or being built from scratch.

  • ›Network troubleshooting & health audits
  • ›BGP & core routing architecture
  • ›Edge & subscriber management
  • ›Full ISP network setup & builds
See the full pillar

Pillar 02

SME & Site Network Services

Business networks built to the same engineering standard as carrier infrastructure — designed, documented and supported.

  • ›Structured cabling & site infrastructure
  • ›VLAN segmentation & firewall design
  • ›Wi-Fi design & deployment
  • ›IP CCTV, VoIP & PBX
See the full pillar

Why operators call us

Senior engineering, without the reseller agenda

01

ISP-grade, not office-grade

We work daily inside BGP tables, route reflectors and peering fabrics — the same discipline is applied whether you run 40 000 subscribers or 40 staff.

02

Diagnose before we sell

Every engagement starts with measurement: latency baselines, packet loss maps, capacity headroom and routing sanity. Recommendations follow the data.

03

Vendor-neutral engineering

MikroTik, Juniper, Cisco, Huawei, Arista, FRR, Ubiquiti. We design for your budget and skills, not a reseller quota.

04

Documentation you can operate

Handover includes topology diagrams, IPAM, ASN and prefix records, change logs and runbooks so your NOC can own it.

Selected work

Measured outcomes, not adjectives

A sample of recent engagements across ISP and business networks.

ISP / Carrier

Cutting peak-hour latency by 68% for a regional ISP

A growing ISP was losing customers to peak-hour congestion complaints despite having spare upstream capacity. A structured health audit found the bottleneck in the routing and edge layers, not the transit links.

-68%

Peak-hour latency

View all case studies

Is your network underperforming, or about to be?

Start with a health audit. We baseline, measure and hand you a prioritised remediation plan — whether or not we do the work.

Talk to an engineerhello@thedefaultgateway.co.za