Peering vs transit
There are two ways for your network to reach another. Transit is paying an upstream carrier to deliver your traffic to the rest of the internet — simple, but you pay per megabit and add a hop. Peering is exchanging traffic directly with another network, usually settlement-free, over an internet exchange. An IX is the neutral switching fabric that makes peering practical: connect one port to the exchange and you can peer with every other network on it.
For a content provider, an eyeball network, or anyone moving meaningful traffic, peering at an IX cuts both cost and latency — traffic goes straight to the destination network instead of up through a transit provider and back down.
Why IX presence is a facility advantage
Internet exchanges live inside carrier-neutral data centers. When an IX is on-net in a facility, a tenant can join it with a local cross-connect rather than hauling capacity to another building. That is why facilities with an exchange on-net concentrate networks: the exchange is a gravitational center, and each network that joins makes the facility more valuable to the next.
The practical upshot for a buyer: a facility with an IX on-net usually offers more reachable networks, better redundancy, and lower effective transit cost than an otherwise-identical building without one. It is one of the strongest single indicators of genuine connectivity density.
How viabandwidth reflects exchange presence
Exchange presence is one of the inputs to a facility's verified connectivity band. A Dense band — the strongest — reflects many networks, exchange presence, and carriers confirmed at the site; Active reflects multiple networks or an exchange on-net. The band is public; the exact number of networks and exchanges, and which ones, are part of the operator dossier. That keeps discovery free while the precise interconnection map — the part that takes real work to verify — stays the paid product.
When IX presence matters most
If you run CDN nodes, DNS, game servers, streaming, or any latency-sensitive or high-volume service, prioritise facilities with an exchange on-net. If you are a small enterprise with modest, mostly-cloud traffic, transit from a carrier in a well-connected building may be enough — but the option to peer later, without moving, is itself worth something. Either way, start from the metros where interconnection concentrates.