Internet DRAFT - draft-farinacci-lisp-lcaf
draft-farinacci-lisp-lcaf
Network Working Group D. Farinacci
Internet-Draft D. Meyer
Intended status: Experimental cisco Systems
Expires: January 10, 2013 J. Snijders
InTouch N.V.
July 9, 2012
LISP Canonical Address Format (LCAF)
draft-farinacci-lisp-lcaf-10
Abstract
This draft defines a canonical address format encoding used in LISP
control messages and in the encoding of lookup keys for the LISP
Mapping Database System.
Status of this Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
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Task Force (IETF). Note that other groups may also distribute
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material or to cite them other than as "work in progress."
This Internet-Draft will expire on January 10, 2013.
Copyright Notice
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document authors. All rights reserved.
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Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Definition of Terms . . . . . . . . . . . . . . . . . . . . . 4
3. LISP Canonical Address Format Encodings . . . . . . . . . . . 5
4. LISP Canonical Address Applications . . . . . . . . . . . . . 7
4.1. Segmentation using LISP . . . . . . . . . . . . . . . . . 7
4.2. Carrying AS Numbers in the Mapping Database . . . . . . . 8
4.3. Convey Application Specific Data . . . . . . . . . . . . . 9
4.4. Assigning Geo Coordinates to Locator Addresses . . . . . . 10
4.5. Generic Database Mapping Lookups . . . . . . . . . . . . . 11
4.6. NAT Traversal Scenarios . . . . . . . . . . . . . . . . . 13
4.7. PETR Admission Control Functionality . . . . . . . . . . . 14
4.8. Multicast Group Membership Information . . . . . . . . . . 16
4.9. Traffic Engineering using Re-encapsulating Tunnels . . . . 17
4.10. Storing Security Data in the Mapping Database . . . . . . 19
4.11. Source/Destination 2-Tuple Lookups . . . . . . . . . . . . 20
4.12. Applications for AFI List Type . . . . . . . . . . . . . . 21
4.12.1. Binding IPv4 and IPv6 Addresses . . . . . . . . . . . 21
4.12.2. Layer-2 VPNs . . . . . . . . . . . . . . . . . . . . 22
4.12.3. ASCII Names in the Mapping Database . . . . . . . . . 22
4.12.4. Using Recursive LISP Canonical Address Encodings . . 23
4.12.5. Compatibility Mode Use Case . . . . . . . . . . . . . 24
5. Security Considerations . . . . . . . . . . . . . . . . . . . 25
6. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 26
7. References . . . . . . . . . . . . . . . . . . . . . . . . . . 27
7.1. Normative References . . . . . . . . . . . . . . . . . . . 27
7.2. Informative References . . . . . . . . . . . . . . . . . . 27
Appendix A. Acknowledgments . . . . . . . . . . . . . . . . . . . 28
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . . 29
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1. Introduction
The LISP architecture and protocols [LISP] introduces two new
numbering spaces, Endpoint Identifiers (EIDs) and Routing Locators
(RLOCs) which are intended to replace most use of IP addresses on the
Internet. To provide flexibility for current and future
applications, these values can be encoded in LISP control messages
using a general syntax that includes Address Family Identifier (AFI),
length, and value fields.
Currently defined AFIs include IPv4 and IPv6 addresses, which are
formatted according to code-points assigned in [AFI] as follows:
IPv4 Encoded Address:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 1 | IPv4 Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... IPv4 Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
IPv6 Encoded Address:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 2 | IPv6 Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... IPv6 Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... IPv6 Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... IPv6 Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... IPv6 Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
This document describes the currently-defined AFIs the LISP protocol
uses along with their encodings and introduces the LISP Canonical
Address Format (LCAF) that can be used to define the LISP-specific
encodings for arbitrary AFI values.
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2. Definition of Terms
Address Family Identifier (AFI): a term used to describe an address
encoding in a packet. An address family currently defined for
IPv4 or IPv6 addresses. See [AFI] and [RFC1700] for details. The
reserved AFI value of 0 is used in this specification to indicate
an unspecified encoded address where the the length of the address
is 0 bytes following the 16-bit AFI value of 0.
Unspecified Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 0 | <nothing follows AFI=0> |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Endpoint ID (EID): a 32-bit (for IPv4) or 128-bit (for IPv6) value
used in the source and destination address fields of the first
(most inner) LISP header of a packet. The host obtains a
destination EID the same way it obtains a destination address
today, for example through a DNS lookup or SIP exchange. The
source EID is obtained via existing mechanisms used to set a
host's "local" IP address. An EID is allocated to a host from an
EID-prefix block associated with the site where the host is
located. An EID can be used by a host to refer to other hosts.
Routing Locator (RLOC): the IPv4 or IPv6 address of an egress
tunnel router (ETR). It is the output of a EID-to-RLOC mapping
lookup. An EID maps to one or more RLOCs. Typically, RLOCs are
numbered from topologically aggregatable blocks that are assigned
to a site at each point to which it attaches to the global
Internet; where the topology is defined by the connectivity of
provider networks, RLOCs can be thought of as PA addresses.
Multiple RLOCs can be assigned to the same ETR device or to
multiple ETR devices at a site.
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3. LISP Canonical Address Format Encodings
IANA has assigned AFI value 16387 (0x4003) to the LISP architecture
and protocols. This specification defines the encoding format of the
LISP Canonical Address (LCA).
The first 4 bytes of an LISP Canonical Address are followed by a
variable length of fields:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type | Rsvd2 | Length |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Rsvd1: this 8-bit field is reserved for future use and MUST be
transmitted as 0 and ignored on receipt.
Flags: this 8-bit field is for future definition and use. For now,
set to zero on transmission and ignored on receipt.
Type: this 8-bit field is specific to the LISP Canonical Address
formatted encodings, values are:
Type 0: Null Body Type
Type 1: AFI List Type
Type 2: Instance ID Type
Type 3: AS Number Type
Type 4: Application Data Type
Type 5: Geo Coordinates Type
Type 6: Opaque Key Type
Type 7: NAT-Traversal Type
Type 8: Nonce Locator Type
Type 9: Multicast Info Type
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Type 10: Explicit Locator Path Type
Type 11: Security Key Type
Type 12: Source/Dest Key Type
Rsvd2: this 8-bit field is reserved for future use and MUST be
transmitted as 0 and ignored on receipt.
Length: this 16-bit field is in units of bytes and covers all of the
LISP Canonical Address payload, starting and including the byte
after the Length field. So any LCAF encoded address will have a
minimum length of 8 bytes when the Length field is 0. The 8 bytes
include the AFI, Flags, Type, Reserved, and Length fields. When
the AFI is not next to encoded address in a control message, then
the encoded address will have a minimum length of 6 bytes when the
Length field is 0. The 6 bytes include the Flags, Type, Reserved,
and Length fields.
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4. LISP Canonical Address Applications
4.1. Segmentation using LISP
When multiple organizations inside of a LISP site are using private
addresses [RFC1918] as EID-prefixes, their address spaces must remain
segregated due to possible address duplication. An Instance ID in
the address encoding can aid in making the entire AFI based address
unique.
Another use for the Instance ID LISP Canonical Address Format is when
creating multiple segmented VPNs inside of a LISP site where keeping
EID-prefix based subnets is desirable.
Instance ID LISP Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 2 | IID mask-len | 4 + n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Instance ID |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
IID mask-len: if the AFI is set to 0, then this format is not
encoding an extended EID-prefix but rather an instance-ID range
where the 'IID mask-len' indicates the number of high-order bits
used in the Instance ID field for the range.
Length value n: length in bytes of the AFI address that follows the
Instance ID field including the AFI field itself.
Instance ID: the low-order 24-bits that can go into a LISP data
header when the I-bit is set. See [LISP] for details.
AFI = x: x can be any AFI value from [AFI].
This LISP Canonical Address Type can be used to encode either EID or
RLOC addresses.
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4.2. Carrying AS Numbers in the Mapping Database
When an AS number is stored in the LISP Mapping Database System for
either policy or documentation reasons, it can be encoded in a LISP
Canonical Address.
AS Number LISP Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 3 | Rsvd2 | 4 + n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AS Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length value n: length in bytes of the AFI address that follows the
AS Number field including the AFI field itself.
AS Number: the 32-bit AS number of the autonomous system that has
been assigned either the EID or RLOC that follows.
AFI = x: x can be any AFI value from [AFI].
The AS Number Canonical Address Type can be used to encode either EID
or RLOC addresses. The former is used to describe the LISP-ALT AS
number the EID-prefix for the site is being carried for. The latter
is used to describe the AS that is carrying RLOC based prefixes in
the underlying routing system.
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4.3. Convey Application Specific Data
When a locator-set needs to be conveyed based on the type of
application or the Per-Hop Behavior (PHB) of a packet, the
Application Data Type can be used.
Application Data LISP Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 4 | Rsvd2 | 8 + n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IP TOS, IPv6 TC, or Flow Label | Protocol |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Local Port | Remote Port |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length value n: length in bytes of the AFI address that follows the
8-byte Application Data fields including the AFI field itself.
IP TOS, IPv6 TC, or Flow Label: this field stores the 8-bit IPv4 TOS
field used in an IPv4 header, the 8-bit IPv6 Traffic Class or Flow
Label used in an IPv6 header.
Local Port/Remote Port: these fields are from the TCP, UDP, or SCTP
transport header.
AFI = x: x can be any AFI value from [AFI].
The Application Data Canonical Address Type is used for an EID
encoding when an ITR wants a locator-set for a specific application.
When used for an RLOC encoding, the ETR is supplying a locator-set
for each specific application is has been configured to advertise.
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4.4. Assigning Geo Coordinates to Locator Addresses
If an ETR desires to send a Map-Reply describing the Geo Coordinates
for each locator in its locator-set, it can use the Geo Coordinate
Type to convey physical location information.
Geo Coordinate LISP Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 5 | Rsvd2 | 12 + n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|N| Latitude Degrees | Minutes | Seconds |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|E| Longitude Degrees | Minutes | Seconds |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Altitude |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length value n: length in bytes of the AFI address that follows the
8-byte Longitude and Latitude fields including the AFI field
itself.
N: When set to 1 means North, otherwise South.
Latitude Degrees: Valid values range from 0 to 90. degrees above or
below the equator (northern or southern hemisphere, respectively).
Latitude Minutes: Valid values range from 0 to 59.
Latitude Seconds: Valid values range from 0 to 59.
E: When set to 1 means East, otherwise West.
Longitude Degrees: Value values are from 0 to 90 degrees right or
left of the Prime Meridian.
Longitude Minutes: Valid values range from 0 to 59.
Longitude Seconds: Valid values range from 0 to 59.
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Altitude: Height relative to sea level in meters. This is a signed
integer meaning that the altitude could be below sea level. A
value of 0x7fffffff indicates no Altitude value is encoded.
AFI = x: x can be any AFI value from [AFI].
The Geo Coordinates Canonical Address Type can be used to encode
either EID or RLOC addresses. When used for EID encodings, you can
determine the physical location of an EID along with the topological
location by observing the locator-set.
4.5. Generic Database Mapping Lookups
When the LISP Mapping Database system holds information accessed by a
generic formatted key (where the key is not the usual IPv4 or IPv6
address), an opaque key may be desirable.
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Opaque Key LISP Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 6 | Rsvd2 | n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Key Field Num | Key Wildcard Fields | Key . . . |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| . . . Key |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length value n: length in bytes of the type's payload. The value n
is the number of bytes that follow this Length field.
Key Field Num: the number of fields (minus 1) the key can be broken
up into. The width of the fields are fixed length. So for a key
size of 8 bytes, with a Key Field Num of 4 allows 4 fields of 2
bytes in length. Valid values for this field range from 0 to 15
supporting a maximum of 16 field separations.
Key Wildcard Fields: describes which fields in the key are not used
as part of the key lookup. This wildcard encoding is a bitfield.
Each bit is a don't-care bit for a corresponding field in the key.
Bit 0 (the low-order bit) in this bitfield corresponds the first
field, right-justified in the key, bit 1 the second field, and so
on. When a bit is set in the bitfield it is a don't-care bit and
should not be considered as part of the database lookup. When the
entire 16-bits is set to 0, then all bits of the key are used for
the database lookup.
Key: the variable length key used to do a LISP Database Mapping
lookup. The length of the key is the value n (shown above) minus
3.
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4.6. NAT Traversal Scenarios
When a LISP system is conveying global address and mapped port
information when traversing through a NAT device, the NAT-Traversal
LCAF Type is used. See [LISP-NATT] for details.
NAT-Traversal Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 7 | Rsvd2 | 4 + n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| MS UDP Port Number | ETR UDP Port Number |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Global ETR RLOC Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | MS RLOC Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Private ETR RLOC Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | RTR RLOC Address 1 ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | RTR RLOC Address k ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length value n: length in bytes of the AFI addresses that follows
the UDP Port Number field including the AFI fields themselves.
MS UDP Port Number: this is the UDP port number of the Map-Server
and is set to 4342.
ETR UDP Port Number: this is the port number returned to a LISP
system which was copied from the source port from a packet that
has flowed through a NAT device.
AFI = x: x can be any AFI value from [AFI].
Global ETR RLOC Address: this is an address known to be globally
unique built by NAT-traversal functionality in a LISP router.
MS RLOC Address: this is the address of the Map-Server used in the
destination RLOC of a packet that has flowed through a NAT device.
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Private ETR RLOC Address: this is an address known to be a private
address inserted in this LCAF format by a LISP router that resides
on the private side of a NAT device.
RTR RLOC Address: this is an encapsulation address used by an ITR or
PITR which resides behind a NAT device. This address is known to
have state in a NAT device so packets can flow from it to the LISP
ETR behind the NAT. There can be one or more NTR addresses
supplied in these set of fields. The number of NTRs encoded is
determined by the LCAF length field. When there are no NTRs
supplied, the NTR fields can be omitted and reflected by the LCAF
length field or an AFI of 0 can be used to indicate zero NTRs
encoded.
4.7. PETR Admission Control Functionality
When a public PETR device wants to verify who is encapsulating to it,
it can check for a specific nonce value in the LISP encapsulated
packet. To convey the nonce to admitted ITRs or PITRs, this LCAF
format is used in a Map-Register or Map-Reply locator-record.
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Nonce Locator Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 8 | Rsvd2 | 4 + n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reserved | Nonce |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length value n: length in bytes of the AFI address that follows the
Nonce field including the AFI field itself.
Reserved: must be set to zero and ignore on receipt.
Nonce: this is a nonce value returned by an ETR in a Map-Reply
locator-record to be used by an ITR or PITR when encapsulating to
the locator address encoded in the AFI field of this LCAF type.
AFI = x: x can be any AFI value from [AFI].
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4.8. Multicast Group Membership Information
Multicast group information can be published in the mapping database
so a lookup on an EID based group address can return a replication
list of group addresses or a unicast addresses for single replication
or multiple head-end replications. This LCAF encoding can be used to
send broadcast packets to all members of a subnet when each EIDs are
away from their home subnet location.
Multicast Info Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 9 | Rsvd2 |R|L|J| 4 + n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reserved | Source MaskLen| Group MaskLen |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Source/Subnet Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Group Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length value n: length in bytes of fields that follow.
Reserved: must be set to zero and ignore on receipt.
R-bit: this is the RP-bit that represents PIM (S,G,RP-bit) multicast
state. This bit can be set for Joins (when the J-bit is set) or
for Leaves (when the L-bit is set). See [LISP-MRSIG] for more
usage details.
L-bit: this is the Leave-Request bit and is used when this LCAF type
is present in the destination EID-prefix field of a Map-Request.
See [LISP-MRSIG] for details.
J-bit: this is the Join-Request bit and is used when this LCAF type
is present in the destination EID-prefix field of a Map-Request.
See [LISP-MRSIG] for details. The J-bit MUST not be set when the
L-bit is also set in the same LCAF block. A receiver should not
take any specific Join or Leave action when both bits are set.
Source MaskLen: the mask length of the source prefix that follows.
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Group MaskLen: the mask length of the group prefix that follows.
AFI = x: x can be any AFI value from [AFI]. When a specific AFI has
its own encoding of a multicast address, this field must be either
a group address or a broadcast address.
4.9. Traffic Engineering using Re-encapsulating Tunnels
For a given EID lookup into the mapping database, this LCAF format
can be returned to provide a list of locators in an explicit re-
encapsulation path. See [LISP-TE] for details.
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Explicit Locator Path (ELP) Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 10 | Rsvd2 | n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Rsvd3 |L|P|S|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reencap Hop 1 ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Rsvd3 |L|P|S|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reencap Hop k ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length value n: length in bytes of fields that follow.
AFI = x: x can be any AFI value from [AFI]. When a specific AFI has
its own encoding of a multicast address, this field must be either
a group address or a broadcast address.
Lookup bit (L): this is the Lookup bit used to indicate to the user
of the ELP to not use this address for encapsulation but to look
it up in the mapping database system to obtain an encapsulating
RLOC address.
RLOC-Probe bit (P): this is the RLOC-probe bit which means the
Reencap Hop allows RLOC-probe messages to be sent to it. When the
R-bit is set to 0, RLOC-probes must not be sent. When a Reencap
Hop is an anycast address then multiple physical Reencap Hops are
using the same RLOC address. In this case, RLOC-probes are not
needed because when the closest RLOC address is not reachable
another RLOC address can reachable.
Strict bit (S): this the strict bit which means the associated
Rencap Hop is required to be used. If this bit is 0, the
reencapsulator can skip this Reencap Hop and go to the next one in
the list.
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4.10. Storing Security Data in the Mapping Database
When a locator in a locator-set has a security key associated with
it, this LCAF format will be used to encode key material. See
[LISP-DDT] for details.
Security Key Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 11 | Rsvd2 | 6 + n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Key Count | Rsvd3 | Key Algorithm | Rsvd4 |R|
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Key Length | Key Material ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... Key Material |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Locator Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length value n: length in bytes of fields that start with the Key
Material field.
Key Count: the Key Count field declares the number of Key sections
included in this LCAF.
Key Algorithm: the Algorithm field identifies the key's
cryptographic algorithm and specifies the format of the Public Key
field.
R bit: this is the revoke bit and, if set, it specifies that this
Key is being Revoked.
Key Length: this field determines the length in bytes of the Key
Material field.
Key Material: the Key Material field stores the key material. The
format of the key material stored depends on the Key Algorithm
field.
AFI = x: x can be any AFI value from [AFI].This is the locator
address that owns the encoded security key.
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4.11. Source/Destination 2-Tuple Lookups
When both a source and destination address of a flow needs
consideration for different locator-sets, this 2-tuple key is used in
EID fields in LISP control messages. When the Source/Dest key is
registered to the mapping database, it can be encoded as a source-
prefix and destination-prefix. When the Source/Dest is used as a key
for a mapping database lookup the source and destination come from a
data packet.
Source/Dest Key Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 12 | Rsvd2 | 4 + n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Reserved | Source-ML | Dest-ML |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Source-Prefix ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = x | Destination-Prefix ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length value n: length in bytes of fields that follow.
Reserved: must be set to zero and ignore on receipt.
Source-ML: the mask length of the source prefix that follows.
Dest-ML: the mask length of the destination prefix that follows.
AFI = x: x can be any AFI value from [AFI]. When a specific AFI has
its own encoding of a multicast address, this field must be either
a group address or a broadcast address.
Refer to [LISP-TE] for usage details.
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4.12. Applications for AFI List Type
4.12.1. Binding IPv4 and IPv6 Addresses
When header translation between IPv4 and IPv6 is desirable a LISP
Canonical Address can use the AFI List Type to carry multiple AFIs in
one LCA AFI.
Bounded Address LISP Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 1 | Rsvd2 | 2 + 4 + 2 + 16 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 1 | IPv4 Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... IPv4 Address | AFI = 2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IPv6 Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... IPv6 Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... IPv6 Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... IPv6 Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length: length in bytes is fixed at 24 when IPv4 and IPv6 AFI
encoded addresses are used.
This type of address format can be included in a Map-Request when the
address is being used as an EID, but the Mapping Database System
lookup destination can use only the IPv4 address. This is so a
Mapping Database Service Transport System, such as LISP-ALT [ALT],
can use the Map-Request destination address to route the control
message to the desired LISP site.
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4.12.2. Layer-2 VPNs
When MAC addresses are stored in the LISP Mapping Database System,
the AFI List Type can be used to carry AFI 6.
MAC Address LISP Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 1 | Rsvd2 | 2 + 6 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 6 | Layer-2 MAC Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... Layer-2 MAC Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length: length in bytes is fixed at 8 when MAC address AFI encoded
addresses are used.
This address format can be used to connect layer-2 domains together
using LISP over an IPv4 or IPv6 core network to create a layer-2 VPN.
In this use-case, a MAC address is being used as an EID, and the
locator-set that this EID maps to can be an IPv4 or IPv6 RLOCs, or
even another MAC address being used as an RLOC.
4.12.3. ASCII Names in the Mapping Database
If DNS names or URIs are stored in the LISP Mapping Database System,
the AFI List Type can be used to carry an ASCII string where it is
delimited by length 'n' of the LCAF Length encoding.
ASCII LISP Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 1 | Rsvd2 | 2 + n |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 17 | DNS Name or URI ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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Length value n: length in bytes AFI=17 field and the null-terminated
ASCII string (the last byte of 0 is included).
4.12.4. Using Recursive LISP Canonical Address Encodings
When any combination of above is desirable, the AFI List Type value
can be used to carry within the LCA AFI another LCA AFI.
Recursive LISP Canonical Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 1 | Rsvd2 | 4 + 8 + 2 + 4 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 4 | Rsvd2 | 12 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IP TOS, IPv6 QQS or Flow Label | Protocol |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Local Port | Remote Port |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 1 | IPv4 Address ... |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| ... IPv4 Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
Length: length in bytes is fixed at 18 when an AFI=1 IPv4 address is
included.
This format could be used by a Mapping Database Transport System,
such as LISP-ALT [ALT], where the AFI=1 IPv4 address is used as an
EID and placed in the Map-Request destination address by the sending
LISP system. The ALT system can deliver the Map-Request to the LISP
destination site independent of the Application Data Type AFI payload
values. When this AFI is processed by the destination LISP site, it
can return different locator-sets based on the type of application or
level of service that is being requested.
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4.12.5. Compatibility Mode Use Case
A LISP system should use the AFI List Type format when sending to
LISP systems that do not support a particular LCAF Type used to
encode locators. This allows the receiving system to be able to
parse a locator address for encapsulation purposes. The list of AFIs
in an AFI List LCAF Type has no semantic ordering and a receiver
should parse each AFI element no matter what the ordering.
Compatibility Mode Address Format:
0 1 2 3
0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 1 | Rsvd2 | 22 + 6 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 16387 | Rsvd1 | Flags |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Type = 5 | Rsvd2 | 12 + 2 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|N| Latitude Degrees | Minutes | Seconds |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|E| Longitude Degrees | Minutes | Seconds |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| Altitude |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| AFI = 0 | AFI = 1 |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| IPv4 Address |
+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
If a system does not recognized the Geo Coordinate LCAF Type that is
accompanying a locator address, an encoder can include the Geo
Coordinate LCAF Type embedded in a AFI List LCAF Type where the AFI
in the Geo Coordinate LCAF is set to 0 and the AFI encoded next in
the list is encoded with a valid AFI value to identify the locator
address.
A LISP system is required to support the AFI List LCAF Type to use
this procedure. It would skip over 10 bytes of the Geo Coordinate
LCAF Type to get to the locator address encoding (an IPv4 locator
address). A LISP system that does support the Geo Coordinate LCAF
Type can support parsing the locator address within the Geo
Coordinate LCAF encoding or in the locator encoding that follows in
the AFI List LCAF.
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5. Security Considerations
There are no security considerations for this specification. The
security considerations are documented for the protocols that use
LISP Canonical Addressing. Refer to the those relevant
specifications.
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6. IANA Considerations
The Address Family AFI definitions from [AFI] only allocate code-
points for the AFI value itself. The length of the address or entity
that follows is not defined and is implied based on conventional
experience. Where the LISP protocol uses LISP Canonical Addresses
specifically, the address length definitions will be in this
specification and take precedent over any other specification.
An IANA Registry for LCAF Type values will be created. The values
that are considered for use by the main LISP specification [LISP]
will be in the IANA Registry. Other Type values used for
experimentation will be defined and described in this document.
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7. References
7.1. Normative References
[RFC1700] Reynolds, J. and J. Postel, "Assigned Numbers", RFC 1700,
October 1994.
[RFC1918] Rekhter, Y., Moskowitz, R., Karrenberg, D., Groot, G., and
E. Lear, "Address Allocation for Private Internets",
BCP 5, RFC 1918, February 1996.
7.2. Informative References
[AFI] IANA, "Address Family Identifier (AFIs)", ADDRESS FAMILY
NUMBERS http://www.iana.org/numbers.html, Febuary 2007.
[ALT] Fuller, V., Farinacci, D., Meyer, D., and D. Lewis, "LISP
Alternative Topology (LISP+ALT)",
draft-ietf-lisp-alt-06.txt (work in progress), March 2011.
[LISP] Farinacci, D., Fuller, V., Meyer, D., and D. Lewis,
"Locator/ID Separation Protocol (LISP)",
draft-ietf-lisp-12.txt (work in progress), April 2011.
[LISP-DDT]
Fuller, V., Lewis, D., and V. Ermagan, "LISP Delegated
Database Tree", draft-fuller-lisp-ddt-01.txt (work in
progress).
[LISP-MRSIG]
Farinacci, D. and M. Napierala, "LISP Control-Plane
Multicast Signaling",
draft-farinacci-lisp-mr-signaling-00.txt (work in
progress).
[LISP-NATT]
Ermagan, V., Farinacci, D., Lewis, D., Skriver, J., Maino,
F., and C. White, "NAT traversal for LISP",
draft-ermagan-lisp-nat-traversal-00.txt (work in
progress).
[LISP-TE] Farinacci, D., Lahiri, P., and M. Kowal, "LISP Traffic
Engineering Use-Cases", draft-farinacci-lisp-te-01.txt
(work in progress).
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Appendix A. Acknowledgments
The authors would like to thank Vince Fuller, Gregg Schudel, Jesper
Skriver, Luigi Iannone, and Isidor Kouvelas for their technical and
editorial commentary.
The authors would like to thank Victor Moreno for discussions that
lead to the definition of the Multicast Info LCAF type.
The authors would like to thank Parantap Lahiri and Michael Kowal for
discussions that lead to the definition of the Explicit Locator Path
(ELP) LCAF type.
The authors would like to thank Fabio Maino and Vina Ermagan for
discussions that lead to the definition of the Security Key LCAF
type.
Thanks also goes to Terry Manderson for assistance obtaining a LISP
AFI value from IANA.
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Authors' Addresses
Dino Farinacci
cisco Systems
Tasman Drive
San Jose, CA 95134
USA
Email: dino@cisco.com
Dave Meyer
cisco Systems
170 Tasman Drive
San Jose, CA
USA
Email: dmm@cisco.com
Job Snijders
InTouch N.V.
Middenweg 76
1097 BS Amsterdam
The Netherlands
Email: job@instituut.net
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