Midwest Internet Exchange

M-IX allowed traffic types

Allowed Traffic Types on Midwest-IX
The M-IX NOC reserves the right to disable ports that violate the rules below

Physical Connection
Interface settings
Ethernet interfaces attached to M-IX ports must be set to auto-sensing unless otherwise agreed.

MAC Layer
Ethernet framing
The M-IX infrastructure is based on the Ethernet II (or DIX Ethernet) standard. This means that LLC/SNAP encapsulation (802.2) is not permitted.

Frames forwarded to M-IX ports shall have one of the following ethertypes:
• 0x0800 – IPv4
• 0x0806 – ARP
• 0x86dd – IPv6

One MAC address per port
Frames forwarded to an individual M-IX port shall all have the same source MAC address.

No proxy ARP
Use of proxy ARP on the router’s interface to the Exchange is not allowed.

Unicast only
Frames forwarded to M-IX ports shall not be addressed to a multicast or broadcast MAC destination address except as follows:
• broadcast ARP packets
• multicast ICMPv6 Neighbour Discovery packets.

No link-local traffic
Traffic for link-local protocols shall not be forwarded to M-IX ports.
Link-local protocols include, but are not limited to, the following list:
• ICMP redirects
• IEEE 802 Spanning Tree
• Vendor proprietary discovery protocols (e.g. CDP, EDP)
• Interior routing protocol broadcasts (e.g. OSPF, ISIS, IGRP, EIGRP)
The following link-local protocols are exceptions and are allowed:
• IPv6 ND

IP Layer
No directed broadcast
IP packets addressed to M-IX peering LAN’s directed broadcast address shall not be automatically forwarded to M-IX ports.

IP addressing
no-export of M-IX peering LAN
IP address space assigned to an M-IX peering LAN shall not be advertised to other networks without explicit permission of M-IX.