Internet Exchange (IX): Direct Peering for Optimized Connectivity
Lower Costs, Better Performance, Direct Access to Content Providers
Internet Exchanges (IXs) are layer 2 switching fabrics where multiple networks peer directly to exchange traffic without intermediary transit providers. By connecting to an IX, you reduce costs by 40-70% compared to traditional IP transit while improving latency and reliability through direct paths to content providers like Google, Netflix, and Facebook.
IXs operate on a bilateral peering model: you establish BGP sessions with willing peers (other networks connected to the IX) to exchange routes. Route servers provide multilateral peering, automatically establishing sessions with dozens of networks simultaneously. Port fees replace traffic-based billing—pay a fixed monthly rate regardless of volume.
Evaluating connectivity options for your network? Compare IX peering with our connectivity services portfolio to determine the optimal architecture for your traffic patterns and budget.
Quick Summary
Direct peering at major European IXPs for optimized traffic exchange and reduced latency.
What is an Internet Exchange?
Understanding IX architecture and operation
Definition and Purpose
An Internet Exchange (IX) is a physical network infrastructure where multiple autonomous systems (ISPs, content providers, CDNs, enterprises) interconnect to exchange internet traffic directly. IXs provide layer 2 Ethernet switching fabric connecting routers from different networks in a single broadcast domain.
Evolution and Modern Role
Early internet routing sent all traffic through the United States, even for local connections. IXs emerged in the 1990s to enable direct local/regional traffic exchange, reducing latency and improving efficiency. Today, major IXs like DE-CIX Frankfurt handle 10+ Tbps peak traffic, serving as critical internet infrastructure connecting thousands of networks.
How IXs Operate
You rent a port (1G, 10G, 100G) on the IX switching fabric, install a cross-connect from your router to the IX switch, configure an IP address from the IX peering subnet, and establish BGP sessions with other members. Traffic between peers stays within the IX layer 2 fabric—never touching transit networks—resulting in 1-3ms latency between participants.
Internet Exchange vs IP Transit - Complete Comparison
Technical and economic differences between peering and transit
| Aspect | Internet Exchange (IX) | IP Transit |
|---|---|---|
| Definition | Direct peering fabric | Upstream connectivity |
| Cost Model | Port fee only (fixed monthly) | Traffic-based billing (per Mbps) |
| Latency | 1-3ms typical (direct path) | 5-15ms or more (multi-hop) |
| Path Control | Direct BGP control with peers | Provider's routing decisions |
| Scalability | Hundreds of peers available | Single/few upstreams |
| Redundancy | Multiple peers (diverse paths) | Provider-dependent |
| Setup Complexity | Multiple BGP sessions to manage | Single session per provider |
| Best For | CDNs, ISPs, large enterprises | Smaller networks, backup connectivity |
Performance Benefits of Internet Exchanges
Latency, bandwidth efficiency, and reliability improvements
Latency Reduction
Direct peering eliminates intermediate hops between networks, dramatically reducing latency compared to transit paths.
Example: Paris to Paris traffic via IX: 1.2ms average. Same traffic via transit: 12-25ms (routes through provider backbone, possibly outside France).
Impact on Applications: Gaming benefits from <5ms latency (better responsiveness). VoIP requires <150ms for acceptable quality. Video streaming sees reduced buffering and faster startup times. Financial applications (HFT) demand sub-millisecond latency—IX essential.
Real-world Results: Connecting to France-IX typically reduces latency to French content providers by 8-15ms compared to transit paths. For user-facing applications, this translates to noticeably faster page loads and smoother video playback.
Bandwidth Efficiency
Traffic Offload: Typical enterprise/ISP network with IX peering offloads 60-80% of traffic to IX, leaving 20-40% for transit. Content-heavy networks (video, gaming, social media) see higher ratios—often 85-90% via IX.
Peering Ratios: Well-optimized network targets 70% IX peering / 30% transit. This balances cost savings (IX is cheaper) with global reach (transit provides full internet access).
Burstability Advantages: IX port fees are flat-rate—use full port capacity without additional charges. Transit uses 95th percentile billing—bursts increase costs. IX handles traffic spikes without penalty.
Reliability and Redundancy
Route Diversity: Peering with multiple networks at IX creates diverse paths. If one peer fails, traffic automatically shifts to other peers or transit. Single transit provider = single point of failure.
DDoS Mitigation Benefits: Traffic stays local at IX—attacks often originate locally and can be mitigated at IX layer before reaching your network. Transit-based attacks traverse long paths, consuming bandwidth across multiple networks.
Control Plane Resilience: Multiple BGP sessions to different autonomous systems provide routing resilience. If one peer's routes become unstable, other peers maintain connectivity.
Major Internet Exchanges Worldwide
Key IXs by region with traffic and member statistics
Europe
•DE-CIX Frankfurt: Largest IX by peak traffic (10+ Tbps). 1,000+ connected networks. Extensive content provider presence.
•AMS-IX Amsterdam: 900+ members. 8+ Tbps peak. Major hub for European and transatlantic traffic.
•LINX London: 850+ members. Historical importance as first major European IX. Strong UK and international connectivity.
•France-IX Paris: 450+ members. Primary IX for French networks. Virtuasys maintains direct connection—our customers access 450+ peers.
•Other Notable: NAMEX Rome (Italy), MSK-IX Moscow (Russia), ESPANIX Madrid (Spain)
North America
•Equinix Exchanges: Multiple locations (Ashburn, Chicago, Dallas, Los Angeles, New York, Seattle, Silicon Valley). Largest IX operator globally by locations.
•AMS-IX Chicago: Extension of Amsterdam IX to North America. 150+ members.
•NYIIX New York: 250+ members. Focus on US East Coast connectivity.
Asia-Pacific
•JPNAP Tokyo: Japan's largest IX. 350+ members. Critical for Asian content delivery.
•HKIX Hong Kong: Major hub for China/Asia traffic exchange. 200+ connected ASNs.
•SIX Seattle: US West Coast / Asia-Pacific bridge. 100+ members.
France-IX Connectivity
Virtuasys maintains direct connection to France-IX Paris, providing our customers immediate access to 450+ peer networks including major content providers, French ISPs, and European carriers. Learn about BGP peering strategies for optimizing IX connections.
When to Use an Internet Exchange
Decision criteria for IX connectivity
You Should Use an IX If:
- Traffic volume > 1 Gbps sustained (economics favor IX at this scale)
- Serving local/regional audience (direct paths to local users and content)
- Cost-sensitive—IX eliminates per-Mbps transit charges for peered traffic
- Low latency required (gaming, video streaming, real-time applications)
- Want direct peering with content providers (Google, Netflix, Facebook, CDNs)
- Multi-homed network architecture (multiple upstream connections for redundancy)
Stick with Transit If:
- Small network (< 500 Mbps sustained)—transit simpler and potentially cheaper
- Global reach more important than local optimization
- Simpler operations preferred—single transit BGP session vs managing dozens of peering sessions
- Limited technical resources—IX requires ongoing BGP management and peering coordination
Hybrid Approach - Best of Both Worlds
Most networks use both IX and transit for optimal cost/performance balance.
Recommended Mix: 60-80% traffic via IX peering, 20-40% via IP transit for global reach and backup.
Architecture: Connect to 1-2 major IXs in your region + maintain 2+ diverse transit providers. Use BGP communities for traffic engineering. Implement local preference policies to prefer IX paths when available, failover to transit when needed.
Compare with our IP transit services for complete connectivity architecture.
Getting Started with Internet Exchanges
Step-by-step deployment process
Step 1: Assess Requirements
•Traffic Volume Analysis: Review current bandwidth usage and growth projections. IX cost-effective above 1 Gbps sustained.
•Geographic Presence: Identify user/traffic concentration. Choose IXs in those regions for maximum benefit.
•ASN and IP Space: IX peering requires autonomous system number (ASN) and provider-independent (PI) IP address space. We offer ASN registration services if needed.
•Budget Allocation: Calculate port fees, cross-connect costs, router requirements, and ongoing NOC resources.
Step 2: Choose IX Location
•Proximity to Users: Select IX closest to your target audience. France-IX for French traffic, DE-CIX for German, etc.
•Peer Diversity: Review IX member lists (available on IX websites). More members = more peering opportunities.
•Cost Structure: Compare port fees and cross-connect charges across IXs. Prices vary significantly by location.
•Technical Support Quality: Evaluate IX support responsiveness and documentation quality. Critical for troubleshooting.
Step 3: Technical Setup
•Colocation in IX Facility: Router must be physically present in IX datacenter. Use existing colocation or arrange new installation.
•Router Configuration: Configure BGP with IX peering subnet IP, establish sessions with route servers and bilateral peers.
•BGP Session Establishment: Coordinate with IX NOC for IP assignment, configure BGP neighbors, verify session establishment.
•Route Server Connection: Connect to IX route servers for multilateral peering—automatically peers with 100+ networks.
Step 4: Peering Strategy
•Open Peering Policy Recommended: Accept all peering requests unless specific reason to decline. Maximizes traffic offload from transit.
•Selective Peering: For specific high-value peers (content providers, major ISPs), establish bilateral sessions with custom routing policies.
•PeeringDB Profile Creation: Create profile at peeringdb.com with your ASN, peering policy, contact information. Industry-standard peering coordination tool.
•Outreach to Potential Peers: Email potential peers (especially content providers) to establish sessions. Most respond within 1-2 weeks.
Virtuasys Internet Exchange Connectivity
Simplified IX access with complete technical management
At Virtuasys, we simplify IX connectivity by handling all technical coordination and providing turnkey peering solutions.
Direct IX Access
Connected to France-IX Paris with pre-established cross-connects and layer 2 fabric access. Your traffic reaches 450+ peer networks directly.
Simplified Setup
We handle IX coordination, cross-connect installation, IP assignment, and route server configuration. You receive production-ready BGP connectivity.
Turnkey Peering
BGP configuration included with session templates for common platforms (Cisco, Juniper, Arista). Pre-configured route filters and communities.
Expert Support
24/7 network engineering team with 15+ years IX operations experience. Troubleshooting, optimization, and peering coordination assistance.
Flexible Port Options
1 Gbps, 10 Gbps, 100 Gbps ports available. Start small and upgrade as traffic grows without infrastructure changes.
Optional Add-Ons
Route Server Access: Multilateral peering with 100+ networks via single BGP session
Remote Peering: Connect to France-IX from your existing datacenter via layer 2 extension
Managed BGP: We configure and maintain all peering sessions on your behalf
Our Differentiators
Pre-established sessions with major content providers (Google, Netflix, Meta, OVH, Cloudflare)
Optimized for French/European traffic—France-IX covers 60%+ of French internet users
Combined with our enterprise fiber connectivity for complete end-to-end solution
Integrated DDoS protection at IX layer—attacks mitigated before reaching your network
Frequently Asked Questions
Common questions about Internet Exchange connectivity
Get Expert Guidance on Internet Exchange Connectivity
Internet Exchange connectivity requires careful planning and technical expertise. Our network engineering team has 15+ years of experience with IX operations and can design the optimal peering strategy for your network.
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ASN Registration
Register an Autonomous System Number (ASN) required for IX peering and BGP routing