A private vlan allows two networks to exchange traffic over a private virtual interface. This is useful for exchanging transit traffic over Fiber Data Exchange / Midwest Internet Exchange, enabling QOS for a dedicated link, or exchanging traffic privately. Private vlans are between two customers on the exchange and are not on the public fabric. On private vlans we allow you to run protocols, such as MPLS, which are not allowed on the public fabric. If you need more than two peers we offer a closed peer group.