© 2006 Cisco Systems, Inc. All rights reserved.IP6FD v IPv6 Operations Identifying IPv6 Data Link Layer Protocols

© 2006 Cisco Systems, Inc. All rights reserved.IP6FD v IPv6 has a specific PPP protocol field value. Information field must be >= 1280 bytes. IPv6 over PPP InformationPadding0x0057

© 2006 Cisco Systems, Inc. All rights reserved.IP6FD v PPP Interface Creation Process Values are confirmed on-link during initialization by the Network Control Protocol (NCP) IPv6CP. IPv6 over PPP (Cont.) Stage 1: Use EUI-64 or EUI-48 from another interface on node. Stage 2: Construct unique 64-bit identifier. Stage 3: Create random identifier.

© 2006 Cisco Systems, Inc. All rights reserved.IP6FD v IPv6 over HDLC (Cisco) IPv6 over HDLC Flag/Address/ControlProtocol TypeDataFCS HDLC is a nonmultiprotocol ISO standard. Cisco has extended HDLC with a proprietary Protocol Type field. –The field is the same as Ethertype0x86DD for IPv6.

© 2006 Cisco Systems, Inc. All rights reserved.IP6FD v IPv6 interface identifier creation process varies on Frame Relay media. Interface Identifier IPv6 over Frame Relay Other Data Link Layer Protocols group/individual bit universal/local bit rrrrrrUG 6-bit random nnnnnnnn : nnnnnnnn 16-bit Frame Relay node ID : bit Frame Relay link ID dddddddd : dddddddd dddddddd 24-bit Frame Relay data-link connection identifier nnnnnnUG 38-bit MID field nnnnnnnn : nnnnnnnn 38-bit MID field dddddddd : dddddddd dddddddd 24-bit Frame Relay data- link connection identifier group/individual bit universal/local bit

© 2006 Cisco Systems, Inc. All rights reserved.IP6FD v IPv6 over ATM Other Data Link Layer Protocols (Cont.) ATM is NBMA and follows those rules. There are a number of methods: –Use ESI values. –Use a 48-bit MAC address. –Use a 64-bit EUI-64 value. –Use an E.164 address value. –Use node-local, node-specific information (such as machine serial number). –Use a random value.

© 2006 Cisco Systems, Inc. All rights reserved.IP6FD v Layer 2 Protocol ID Number for IPv6 Ethernet and IP Protocol Numbers Layer 2 Type EthernetPPP Frame Relay FDDIHDLC Token Ring IEEE 1394 ATM Protocol ID# for IPv6 0x86DD0x80570x8E0x86DD Protocol ID# for IPv4 0x08000x002D 0x0800 Protocol ID Type Ether- type PPP Protocol Field Network Layer Protocol Identifier Ether- type

© 2006 Cisco Systems, Inc. All rights reserved.IP6FD v IPv6 has a specific protocol field value for use over PPP, and IPv6 can also be used over Cisco HDLC. IPv6 can be used over NBMA, Frame Relay, and ATM, with variations in the interface identifier creation process. IPv6 can be carried over a number of logical link types, with varying protocol ID types. Summary

© 2006 Cisco Systems, Inc. All rights reserved.IP6FD v2.02-9