Two computers can be in Singapore and still send traffic through another country if the networks connecting them have no better commercial or technical route.
Internet Exchange Points reduce that possibility.
An IXP is a neutral interconnection platform where independent networks—Internet service providers, content networks, cloud platforms, universities, enterprises and other autonomous systems—can connect to a shared switching fabric and exchange traffic directly through peering relationships.
Singapore Internet Exchange, or SGIX, is one of Singapore’s main neutral peering platforms. Current 2026 industry data shows more than 240 autonomous systems connected to the exchange ecosystem, with route-server services simplifying peering among many participants.
The operating chain is: user requests data → ISP decides the best BGP route → if destination network is a local peer, packet enters the IXP switch fabric → destination network receives it directly → return traffic follows an available peering or transit path.
1. The Internet is a network of networks
There is no single global company called “the Internet”.
Thousands of independently operated networks connect to one another under technical and commercial agreements.
Each major network is identified by an Autonomous System Number and controls its own routing policy.
The global Internet works because these networks exchange reachability information and agree, formally or informally, how traffic should move between them.
2. Transit and peering are different ways to reach another network
With IP transit, one network pays another provider for access to a much larger set of Internet destinations.
With peering, two networks agree to exchange traffic directly between their own customers and routes according to their peering policy.
Both are necessary. Transit gives broad reachability. Peering can make high-volume or strategically important paths shorter, cheaper or more controllable.
3. An IXP is a shared Ethernet-like interconnection fabric
Networks connect routers to ports on the IXP’s switching infrastructure.
The exchange itself normally does not become the retail ISP for everyone connected to it.
It provides the common physical and logical meeting place through which members can establish peering sessions.
The IXP therefore is closer to a neutral interchange than a content provider.
4. BGP decides which routes are available
The Border Gateway Protocol, or BGP, is the main routing protocol used among autonomous systems.
Networks announce which Internet address prefixes they can reach and apply their own routing policies to choose among alternative paths.
An IXP does not force every connected network to exchange every route. It creates the place where networks can do so efficiently when their policies allow.
5. Direct local peering can remove geographical detours
Imagine Singapore ISP A needs to deliver a packet to content network B, which also has infrastructure in Singapore.
If A and B have a local peering route, the packet can cross at a Singapore exchange point.
Without that path, A may send the traffic to a transit provider whose commercial route is longer, potentially leaving Singapore before returning.
Peering therefore helps geography and routing policy agree more closely.
6. Shorter routes usually reduce latency
Every additional kilometre and router hop adds some delay.
A local peering path cannot make the speed of light faster, but it can remove unnecessary distance and intermediate networks.
This is particularly valuable for gaming, video, financial services, cloud applications and other interactive services sensitive to latency and jitter.
7. Peering can reduce transit cost
Networks often pay transit providers according to capacity or traffic arrangements.
If two networks exchange large volumes directly at an IXP, they can reduce the amount of that traffic needing paid third-party transit.
The savings can justify the cost of an exchange port, cross-connect and network engineering required to maintain the peer.
8. Route servers reduce the number of bilateral sessions needed
If 200 networks all established individual BGP sessions with every other willing peer, the number of relationships would become operationally large.
Route servers simplify this.
A participant can establish a session with the route server and exchange approved reachability information with many other participating networks through that service, subject to routing policies.
The route server reduces configuration complexity without carrying the data traffic itself in the same way as an ordinary transit router.
9. SGIX is a neutral exchange rather than one incumbent carrier’s private network
SGIX was established to provide a neutral platform for local and international IP traffic exchange.
Neutrality matters because participants may otherwise be reluctant to interconnect through infrastructure controlled commercially by a direct competitor.
A neutral exchange creates a shared marketplace for connectivity in which ISPs, content networks and international operators can meet without transferring control of their whole network to one another.
10. An IXP can span many data-centre buildings
An Internet exchange does not need to exist in one physical room.
Modern exchanges extend their switching fabric across several data-centre facilities so participants can join from different locations.
SGIX has points of presence across multiple Singapore data-centre sites.
That distribution reduces the need for every member to house routers in one building and can improve physical resilience.
11. Content delivery networks benefit strongly from local peering
A content delivery network stores popular content close to users.
If that CDN also peers locally with Singapore ISPs, video, software updates and web content can travel from a nearby cache to the customer without crossing a submarine cable.
Hosting content locally and peering locally therefore reinforce one another.
12. Local traffic staying local preserves submarine capacity
An unnecessary international detour consumes capacity on submarine systems in both directions.
Keeping genuinely local traffic within Singapore leaves more international bandwidth available for traffic that actually needs to cross borders.
The IXP therefore contributes indirectly to the efficiency of international connectivity as well as local performance.
13. Peering improves resilience when it creates another independent route
If a transit provider has an outage, a network with healthy peering sessions may continue reaching some destinations directly.
Likewise, if one peering route fails, transit can remain an alternative.
Multiple commercial and technical paths give operators more ways to route around failure.
Resilience comes from path diversity, not merely from the existence of an exchange membership.
14. Routing security matters because BGP announcements can be wrong
The Internet’s routing system depends heavily on networks announcing accurate reachability information.
Tools such as route filtering, RPKI-based route-origin validation and MANRS practices help reduce the risk of accidental or malicious route announcements being accepted.
Current 2026 PeeringDB and Internet Society data shows widespread RPKI adoption among SGIX-connected networks.
The exchange therefore is not only a speed platform; it is part of the routing-trust ecosystem.
15. More members create more potential direct paths
An IXP with three networks offers only a few possible peering relationships.
An exchange with hundreds of connected autonomous systems can bring ISPs, content platforms, cloud providers, research networks and regional carriers into one interconnection ecosystem.
The value can therefore grow faster than the number of members because each new participant potentially gains access to many existing peers.
16. An IXP does not guarantee the shortest route
BGP routing follows network policy, not a global instruction to minimise kilometres.
A network may prefer one route for commercial, capacity, security or operational reasons even if another route is geographically shorter.
IXPs make direct routes possible. Individual networks still decide which routes they announce and accept.
17. A worked example: Singapore gamer reaches Singapore-hosted server
Imagine a game server is hosted in a Singapore data centre on a network that peers with the player’s ISP at SGIX.
The player’s packets travel through the ISP, enter the exchange fabric and move directly to the hosting network. The route avoids an unnecessary international transit path and stays close to the actual geography of the user and server.
The exchange did not make the game faster by computation. It removed unnecessary network distance.
18. A worked example: local peering path fails
Suppose the direct peer becomes unavailable.
BGP withdraws or stops using the affected route. If the networks have an alternative transit or peering path, traffic moves to that route automatically according to policy. Latency or cost may increase until the direct peer returns.
The packet path changes because the Internet is designed around reachability through alternatives rather than one permanent road.
19. Common misconceptions
Misconception: An Internet exchange is an Internet service provider.
No. it is a neutral interconnection platform used by independent networks.
Misconception: All local Singapore traffic automatically stays in Singapore.
No. actual routing depends on peering, transit and network policy.
Misconception: Peering eliminates the need for transit.
No. transit remains necessary for destinations not reachable through direct or exchange-based peers.
Misconception: More IXP members automatically mean every pair peers with each other.
No. participants retain their own peering policies.
Misconception: Local peering makes submarine cables less important.
No. it removes unnecessary international traffic while submarine cables remain essential for genuinely overseas destinations.
20. The deeper idea: the Internet becomes faster when institutions agree to meet closer to the data
The packet does not know Singapore geography.
Routers know only the routes that networks announce and accept.
An Internet exchange gives independent networks a common place to reveal a better option: we are both here, so our traffic does not need to travel through somebody farther away.
The improvement looks technical. Underneath it is institutional cooperation.
Networks remain separate companies and separate autonomous systems. Peering lets them share one short piece of infrastructure so their customers do not have to pay in distance for that separation.