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Update to first version Interoperability issues - History Different choices have been evaluated Different Mcast addresses. Gives isolation at little cost. Any implementation which does not properly filter mcast addresses today is already at risk for meltdown. Ethernet II frame with new type. Implementations are not expecting IS-IS PDUs in anything other than 802.3 format. This option requires major changes. Combination of 1 and 2. Adds little if no benefit. |