Allowed traffic

Allowed Traffic Types on Unicast Peering LANs

Important: The AMS-IX NOC reserves the right to disable ports that violate the rules below.

To ensure smooth operation of the AMS-IX 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. For more info, including hints on how to configure equipment, please see the AMS-IX Configuration Guide.

  1. Physical Connection
  2. 1.1 Interface settings
    100base and 10base Ethernet interfaces attached to AMS-IX ports must be explicitly configured with speed, duplex other configuration settings, i.e. they should not be auto-sensing.

  3. MAC Layer
  4. 2.1 Ethernet framing
    The AMS-IX infrastructure is based on the Ethernet II (or “DIX Ethernet”) standard. This means that LLC/SNAP encapsulation (802.2) is not permitted. For more information on the differences, see the Ethernet FAQ, question 4.1.

    2.2 Ethernet types
    Frames forwarded to AMS-IX ports must have one of the following ethertypes:

    • 0x0800 - IPv4
    • 0x0806 - ARP
    • 0x86dd - IPv6

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

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

    2.5 Unicast only
    Frames forwarded to AMS-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. Please note that this does not include Router Solicitation or Advertisement packets

    2.6 No link-local traffic
    Traffic for link-local protocols shall not be forwarded to AMS-IX ports.

    Link-local protocols include, but are not limited to, the following list:

    • IRDP
    • ICMP redirects
    • IEEE 802 Spanning Tree
    • Vendor proprietary protocols. These include, but are not limited to:
      • Discovery protocols: CDP, EDP
      • VLAN/trunking protocols: VTP, DTP
    • Interior routing protocol broadcasts (e.g. OSPF, ISIS, IGRP, EIGRP)
    • PIM-SM
    • PIM-DM
    • DVMRP
    • ICMPv6 ND-RA
    • UDLD
    • L2 Keepalives

    The following link-local protocols are exceptions and are allowed:

    • ARP
    • IPv6 ND
  5. IP Layer
  6. 3.1 No directed broadcast

    IP packets addressed to AMS-IX peering LAN's directed broadcast address shall not be automatically forwarded to AMS-IX ports.

  7. IP addressing

    4.1 no-export of AMS-IX peering LAN

  8. IP address space assigned to AMS-IX Peering LANs shall not be advertised to other networks without explicit permission of AMS-IX.