AIX Version 4.3 Differences Guide

• Interface initialization
– Autoconfiguration
– Duplicate address detection (DAD)
– Joining the all nodes multicast group
– Sending router solicitations
– Responding to router advertisements
• Interface maintenance
– Managing prefixes (changing, if necessary, when router advertisements are
received)
– Timing out prefixes when advertised lifetime expires
– Forming an appropriate address for received prefixes
– DAD as necessary
• NDP support
– Destination routing (NDP table)
– Path MTU
– Determination of neighbor unreachability (NUD)
• Source address selection
– For multihomed hosts (problems with link-local)
• Routing
– Uses version 4 routes for compatible addresses (through the Simple
Internet Transition [SIT] interface)
– Maintains multiple default routes, with fast switching based on NUD
• Tunneling
– See section 7.1.5, “Tunneling over IPv4” on page 152 for more details.
• ICMPv6 - control messages
– See section 7.1.4, “Internet Control Message Protocol (ICMPv6)” on page
151 for more details.
• Address mapping
– Incoming v4 packets passed up to v6-aware applications through mapping
the address to v6
Note: For more detailed information on this topic, refer to RFCs 1970 and 1971.
7.1.4 Internet Control Message Protocol (ICMPv6)
ICMPv6 is used by IPv6 nodes to report errors encountered in processing
packets and to perform other internet-layer functions, such as diagnostics
(ICMPv6 ping) and multicast membership reporting.
7.1.4.1 ICMPv6 Message Types
ICMPv6 messages are grouped into two classes:
• Error messages
• Informational messages
Networking Enhancements 151