Niels Bakker <niels=nanog@bakker.net> writes:

AMS-IX does not, nor does it require its members to peer with anybody (including the exchange-supporting network infrastructure). AMS-IX believes that the decision to peer is up to the individual members.

NIXI (http://www.nixi.org) - the national internet exchange of india - seems to enforce a mandatory multilateral peering policy (though their policy, and their setup, sure sounds like a godawful mess, right about now) :( Quoting from their membership agreement (a word doc at http://www.nixi.org/NIXI%20T&C_%20ver_%202.doc) -

Peering Policy of NIXI

NIXI has adopted a Multilateral peering policy . Member ISPs shall not refuse to accept traffic from other members.

--srs