Appendix F -- IPv6 Reference Tables

Appendix F

This appendix contains a series of summary reference tables for IPv6.

Table F-1. Defined Values for the Scope Field for IPv6 Multicast Addresses

Table F-2. Typical Values of the Next Header Field in the IPv6 Header

*Value (Decimal)*	*Header*
0	Hop-by-Hop Options header
6	TCP
17	UDP
41	Encapsulated IPv6 header
43	Routing header
44	Fragment header
50	Encapsulating Security Payload header
51	Authentication header
58	ICMPv6
59	No next header
60	Destination Options header

Table F-3. Option Types for Hop-by-Hop Options and Destination Options Headers

*Option Type*	*Option and Where It Is Used*	*Alignment Requirement*
0	Pad1 option: Hop-by-Hop and Destination Options headers	None
1	PadN option: Hop-by-Hop and Destination Options headers	None
194 (0xC2)	Jumbo Payload option: Hop-by-Hop Options header	4n + 2
5	Router Alert option: Hop-by-Hop Options header	2n + 0
198 (0xC6)	Binding Update option: Destination Options header	4n + 2
7	Binding Acknowledgement option: Destination Options header	4n + 3
8	Binding Request option: Destination Options header	None
201 (0xC9)	Home Address option: Destination Options header	8n + 6

Table F-4. IPv6 MTUs for Common LAN and WAN Technologies

*LAN or WAN Technology*	*IPv6 MTU*
Ethernet (Ethernet II encapsulation)	1,500
Ethernet (IEEE 802.3 SubNetwork Access Protocol [SNAP] encapsulation)	1,492
Token Ring	Varies
FDDI	4,352
Attached Resource Computer Network (ARCNet)	9,072
PPP	1,500
X.25	1,280
Frame Relay	1,592
Asynchronous Transfer Mode (ATM) (Null or SNAP encapsulation)	9,180

Table F-5. ICMPv6 Messages

*ICMPv6 Type*	*Message*	*Chapter for Details*
1	Destination Unreachable	5
2	Packet Too Big	5
3	Time Exceeded	5
4	Parameter Problem	5
128	Echo Request	5
129	Echo Reply	5
130	Multicast Listener Query	7
131	Multicast Listener Report	7
132	Multicast Listener Done	7
133	Router Solicitation	6
134	Router Advertisement	6
135	Neighbor Solicitation	6
136	Neighbor Advertisement	6
137	Redirect	6
150	Home Agent Address Discovery Request	12
151	Home Agent Address Discovery Reply	12

Table F-6. ICMPv6 Destination Unreachable Messages

*Code Field Value*	*Description*
0 - No Route to Destination	No route matching the destination was found in the routing table.
1 - Communication with Destination Administratively Prohibited	The communication with the destination is prohibited by administrative policy. This is typically sent when the packet is discarded by a firewall.
2 - Beyond Scope of Source Address	The destination is beyond the scope of the source address. A router sends this when the packet is forwarded by using an interface that is not within the scoped zone of the source address. This message is defined in the Internet draft titled "IPv6 Scoped Address Architecture."
3 - Address Unreachable	The destination address is unreachable. This is typically sent because of an inability to resolve the destination's link-layer address.
4 - Port Unreachable	The destination port was unreachable. This is typically sent when an IPv6 packet containing a UDP message arrived at the destination but there were no applications listening on the destination UDP port.

Table F-7. ICMPv6 Parameter Problem Messages

*Code Field Value*	*Description*
0 - Erroneous Header Field Encountered	An error in a field within the IPv6 header or an extension header was encountered.
1 - Unrecognized Next Header Type Encountered	An unrecognized Next Header field value was encountered. This is equivalent to the ICMPv4 Destination Unreachable-Protocol Unreachable message.
2 - Unrecognized IPv6 Option Encountered	An unrecognized IPv6 option was encountered.

Table F-8. IPv6 Neighbor Discovery Option Types

*Type*	*Option Name*	*Source Document*
1	Source Link-Layer Address	RFC 2461
2	Target Link-Layer Address	RFC 2461
3	Prefix Information	RFC 2461
4	Redirected Header	RFC 2461
5	MTU	RFC 2461
7	Advertisement Interval	"Mobility Support in IPv6" draft
8	Home Agent Information	"Mobility Support in IPv6" draft
9	Route Information	"Default Router Preferences and More-Specific Routes" draft

Table F-9. Neighbor Discovery Messages and the Options That Might Be Included

*ND Message*	*ND Options That Might Be Included*
Router Solicitation	Source Link-Layer Address option: Used to inform the router of the link-layer address of the host for the unicast Router Advertisement response.
Router Advertisement	Source Link-Layer Address option: Used to inform the receiving host(s) of the link-layer address of the router. Prefix Information option(s): Used to inform the receiving host(s) of on-link prefixes and whether to autoconfigure stateless addresses. MTU option: Used to inform the receiving host(s) of the IPv6 MTU of the link. Advertisement Interval option: Used to inform the receiving host how often the router (the home agent) is sending unsolicited multicast router advertisements. Home Agent Information option: Used to advertise the home agent's preference and lifetime. Route Information option(s): Used to inform the receiving host(s) of specific routes to add to a local routing table.
Neighbor Solicitation	Source Link-Layer Address option: Used to inform the receiving node of the link-layer address of the sender.
Neighbor Advertisement	Target Link-Layer Address option: Used to inform the receiving node(s) of the link-layer address corresponding to the Target Address field.
Redirect	Redirected Header option: Used to include all or a portion of the packet that was redirected. Target Link-Layer Address option: Used to inform the receiving node(s) of the link-layer address corresponding to the Target Address field.