To ensure smooth operation of the CXC infrastructure we impose a set of restrictions on what kind of traffic is allowed on the peering fabric. This page gives a summary of those restrictions. CXC Team reserves the right to disable ports that violate the rules below.

Allowed Ethertypes

Frames forwarded to CXC ports must have one of the following EtherTypes:

MAC Address Limitation

Participants may utilize a single layer-2 MAC address to connect a single layer-3 router to each port or LAG group allocated to them by the Governing Board. Change of MAC address (such as due to the replacement of Participants' router) may require explicit notification to the Governing Board.

No Proxy ARP

Use of proxy ARP on the router interface is not allowed.

Unicast Traffic

Frames forwarded to CXC ports shall not be addressed to a multicast or broadcast MAC destination address except as follows:

Link-Local Traffic

Traffic related to link-local protocols will be filtered out on ingress, and will not be forwarded to other CXC ports. Link-local protocols include, but are not limited to, the following list:

Layer 4

Using application layer protocols to unleash malicious actions against other CXC participants over CXC infrastructure, is forbidden. The following list includes, but is not limited to:

Open Internet Exchange
Peering DB