Network Slicing and Multi-Tenant QoS: Segmenting Network Services

Network slicing for multi-tenant segmentation: VRF, hierarchical QoS, per-tenant VXLAN VNI, and strict isolation. Use cases: ISPs, multi-customer data centers, and multi-BU enterprises. 2026 technical guide.

Multi-Tenant Model

• Strict isolation between tenants/customers
• Each tenant has its own network view
• Shared resources (hardware) with separate logical environments
• Critical: no inter-tenant leakage

Technologies

VRF (Virtual Routing and Forwarding)

• Dedicated routing table for each tenant on the router
• Separate IP namespace
• MPLS L3VPN uses VRF
• Limit: approximately 500-4000 VRFs per router, depending on hardware

VXLAN VNI

• VNI = tenant ID
• Up to 16M tenants
• EVPN for per-tenant MAC/IP distribution
• Modern data center standard

Hierarchical QoS

• Parent shaper per tenant (10 Mbps for tenant A, 100 Mbps for tenant B)
• Child policies: traffic classes within each tenant
• Enables differentiated SLAs for each customer

5G Network Slicing

• 3GPP standard
• Slice = logical subnetwork with dedicated QoS
• Use cases: industrial URLLC, IoT, and enhanced mobile broadband
• Orchestration: NSM (Network Slice Manager)

Security Isolation

• Inter-VRF ACLs: prevent leakage
• Separate Route Targets
• Separate VLANs
• Per-tenant audit trail
• Customer-facing portal for each tenant

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Multi-tenant architecture: MPLS VRF, EVPN VXLAN, and 5G slicing. Per-tenant isolation, QoS, and monitoring. Quote within 1 week.