NAMEX technical regulations require that “For each port of NaMeX switches used by a Member, only one MAC address will be authorized; that MAC address will be associated to the IP addressed used for peering by the Member”.
In order to enforce this rule, NaMeX uses MAC Locking (aka Port-Security): for each peerer connection, the MAC address of its router interface will be statically “locked” to the switch port where it is connected. All packets coming from other MAC addresses will be dropped by the port.
If Members need to change a network interface on their devices, they must give communication of the new MAC address to NaMeX NOC, so that the new MAC is authorized to exchange packets on the peering LAN.
Broadcast Storm Control
Together with MAC Locking, NAMEX enforces Broadcast Storm Control mechanisms on its switches, in order to prevent an accidentally generated broadcast storm to affect the whole Exchange operations. As a general rule, on each port the broadcast level is limited to 10% of available bandwidth.
Each switchport is filtered based on the ether-type field so that only packets with proper payload are allowed: namely, we currently allow ethertypes corresponding to ARP, IP Version 4 and IP version 6 protocols.