HKIX is a layer-two Internet Exchange over Ethernet. All participants connecting to HKIX at CUHK are exchanging data via an Ethernet that is a layer-two technology. All routers on the Ethernet are exchanging routing tables (or peering) with the route server set up by HKIX using BGP4. All participants of HKIX are considered equal and they must peer with one another via the route servers.

The numbers of MLPA prefixes (both IPv4 and IPv6) are trending increasing. In case you need to set maximum prefix limits on your routers, you should regularly observe the prefixes numbers at http://www.hkix.net/hkix/stat/aggt/hkix-pfxrcd.html and increase your limits (if any) when necessary. Suggested prefix limit on your routers (if you need to set so) is at least (monthly 2-hr average) / 0.7.