LINX

LINX
John Arundel · CC BY-SA 3.0 · source
Name	LINX
Type	Not-for-profit Internet Exchange Point
Founded	1994
Headquarters	London, United Kingdom
Key people	John Souter, Frank Juszczyk, Will Hargrave
Area served	United Kingdom, Europe
Membership	ISPs, content providers, cloud providers, universities

LINX

LINX is a major not-for-profit Internet Exchange Point (IXP) based in London that facilitates interconnection among Internet service providers, content delivery networks, cloud platforms, telecommunications carriers, and research networks. It operates multiple exchange fabrics across data centers and metro areas to reduce transit costs, improve latency, and increase resilience for participants such as BT Group, Akamai Technologies, Amazon Web Services, Cloudflare, and Google. LINX serves as a hub in the ecosystem linking regional exchanges, submarine cable landings, and global operators including HSBC-hosted networks, and cooperates with organizations like RIPE NCC, IX.br, and DE-CIX on best practices.

Overview

LINX provides Ethernet-based peering services and route servers enabling Autonomous Systems operated by providers such as NTT Communications, Verizon Communications, Orange S.A., Telefonica, and Virgin Media to exchange traffic directly. By facilitating settlement-free bilateral and multilateral peering among members including Facebook, Netflix, Microsoft Azure, and academic backbones like JANET (UK), LINX reduces dependency on paid transit through carriers such as Level 3 Communications and CenturyLink. LINX maintains high-availability switching fabrics in colocation sites such as those operated by Equinix, Telehouse, and Digital Realty and interconnects with submarine cable systems landing in hubs like Bude and Falmouth in the United Kingdom. Members benefit from services like private VLANs, route servers, and hosted interconnects for cloud providers and content networks.

History

LINX traces its origins to mid-1990s efforts in London to improve interconnection among early commercial and academic networks, occurring alongside developments at exchanges like MAI-East and NAP of the Americas. Early governance involved Internet pioneers and regional operators including representatives from British Telecom and universities that had participated in initiatives like JANET. Through the 2000s LINX expanded as Internet traffic patterns shifted with the rise of content providers such as YouTube and Wikipedia, and as submarine cable capacity grew with systems like TAT-14. LINX has adapted to industry changes seen with the deployment of carrier-neutral data centers by TelecityGroup and consolidation events involving companies like Equinix. The exchange has also engaged with regulatory and standards bodies including Ofcom and IETF on operational and technical guidance.

Architecture and Operations

LINX operates high-capacity Ethernet switching fabrics distributed across multiple colocation facilities and metropolitan rings to provide redundancy and low-latency paths between participants including cloud regions of Amazon Web Services and Google Cloud Platform. The technical architecture incorporates route servers supporting BGP sessions for multilateral peering with configurations compatible with implementations from vendors such as Cisco Systems, Juniper Networks, and Arista Networks. LINX employs traffic engineering techniques used by backbone operators like T-Mobile and AT&T to balance load across ports and to mitigate failure modes similar to incidents involving Level 3 Communications and Cogent Communications. Operational practices include carrier-grade monitoring, maintenance windows coordinated with data center operators like Interxion, and DDoS mitigation assistance comparable to services offered by Akamai and Cloudflare.

Peering and Membership

LINX membership comprises a diverse set of Autonomous Systems run by Internet service providers, content delivery networks, cloud providers, research networks, and mobile operators such as EE (company), Three UK, Vodafone, and O2 (UK)/Telefónica UK. Membership models support both bilateral and multilateral peering using route servers modeled on conventions from exchanges like LINX NoVA-style fabrics and arrangements similar to those at AMS-IX. Prospective members undergo administrative and technical onboarding comparable to processes used by DE-CIX and AMS-IX, and may utilize services such as private interconnects for entities like BBC's iPlayer or streaming platforms akin to Netflix. LINX also offers hosted port services that mirror offerings from large carriers and meets compliance expectations observed by institutions including NHS Digital and higher-education networks.

Network Performance and Traffic Management

LINX emphasizes low-latency, high-throughput interconnection to support heavy content flows generated by platforms like YouTube, Spotify, and gaming networks operated by Electronic Arts and Valve Corporation. Traffic engineering practices include prefix filtering, MED, local-pref adjustments and route dampening strategies used across operators such as Cisco Systems' and Juniper Networks deployments to manage churn and instability. Capacity planning anticipates growth trends similar to those reported by Akamai and Cisco VNI forecasts, while peering policies and route server features enable participants like Cloudflare and Fastly to optimize traffic locality. LINX coordinates incident response and capacity escalation in concert with colocation providers and transit suppliers to address congestion events reminiscent of historical outages affecting providers like Cogent Communications.

Governance and Policies

LINX is governed by a board and membership-elected councils with rules and bylaws that outline membership obligations, peering policy, and dispute resolution influenced by models used by organizations such as RIPE NCC and ISOC. Policy areas cover ports, engineering change procedures, and acceptable use expectations, paralleling governance documents from exchanges like DE-CIX and AMS-IX. Financial and operational transparency is maintained through member reporting and audited accounts similar to practices in not-for-profit entities like Internet Society. LINX engages with public stakeholders including regulators such as Ofcom and international standard-setting bodies like IETF to align on resilience, security, and interoperability.

Category:Internet exchange points