IPv6 addressing works diffferntly than IPv4. IPv6 uses Neighbor Discovery process (RFC 2461) rather than ARP protocol for the address resolution. SunATM 5.1 does not currently support address resolution through RFC 2461 over IPv6. Thus PVC and SVC address resolution over IPv6 must be statically configured. You must enter all destination hosts and ATM Address/VCI entries on each host's local aarconfig file.