About IX <Internet eXchange>

What is IX

IX is an internet exchange service for the purpose of providing peer-to-peer connection between networks of internet service providers (ISP). IX fulfills the role of supporting the backbone of the internet through providing an economical peer-to-peer connection between ISP's instead of having to go through unnecessary relays. In order to make this peer-to-peer connection, JPIX provides IX ports according to the amount of connection traffic of the ISP's.

Merits connecting to IX

Due to the "broadband era," every ISP and webhosting company is facing the necessity of strengthening its backbone network. On the other hand, a backward phenomenon is occurring in that income from the end user is insufficient for the cost of strengthening their backbone. In such situations, IX provides an economical traffic exchange environment where ISP's can directly connect to each other.

Things you should know before connecting to IX

The following are things you should know for connecting to IX.

BGP4,AS number

The IX service JPIX provides is a "Layer 2 Service." JPIX members could be required to exchange their routing information among each other. The protocol to be used for this exchange will be the BGP4 (Border Gateway Protocol version 4). In order to distinguish ISP's within this transaction as exchanging routing information, an AS number (Autonomous System) is required, so you will need to obtain one to use the service. The JPNIC (Japan Network Information Center) manages the allocation on of the AS number in Japan, so please contact them for instructions on how to obtain one. In regards to consultation on managing a BGP4 protocol, JPIX can introduce companies that can provide such consultation.

Peering Negotiation

Under the "Layer 2 Service," solely connecting to the IX port will not enable the flow of traffic. There is a need to make necessary setups for exchanging each other's routing information on their connected router. This is called "peering" and you cannot automatically peer all of the JPIX members. You will need to make a "peering negotiation" with the members you wish to peer beforehand. After negotiating and getting approval from other members you wish to connect to, you will set the respective routers to accomplish the connection. In any case, JPIX does not support any "peering negotiation" or "peering policy (the agreement on peering, pricing policies, etc.)." This will be taken care of by each member.


The MLPA (Multi-Lateral Peering Agreement) is provided for those who wish to peer with anybody. Under this agreement, MLPA members can basically connect to other MLPA members. At present, there are 20 companies registered under this agreement.