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0001 Padding Protocol
0003 to 001f Reserved (transparency inefficient)
0021 Internet Protocol
0023 OSI Network Layer
0025 Xerox NS IDP
0027 DECnet* Phase IV
0029 AppleTalk*
002b Novell* IPX*
002d Van Jacobson Compressed TCP/IP
002f Van Jacobson Uncompressed TCP/IP
0031 Bridging PDU
0033 Stream Protocol (ST-II)
0035 Banyan Vines*
0037 Reserved (until 1993)
0039 AppleTalk EDDP
003b AppleTalk SmartBuffered
003d Multilink
003f NetBIOS Framing
0041 Cisco Systems*
0043 Ascom Timeplex*
0045 Fujitsu* Link Backup and Load Balancing (LBLB)
0047 DCA Remote Lan
0049 Serial Data Transport Protocol (PPP-SDTP)
004b SNA over 802.2
004d SNA
004f IP6 Header Compression
006f Stampede Bridging
007d Reserved (Control Escape) [RFC1661]
007f Reserved (compression inefficient) [RFC1662]
00cf Reserved (PPP NLPID)
00fb Compression on single link in multilink group
00fd 1st choice compression
00ff Reserved (compression inefficient)
0201 802.1d Hello Packets
0203 IBM* Source Routing BPDU
0205 DEC LANBridge* 100 Spanning Tree
0231 Luxcom*
0233 Sigma Network Systems*
8001-801f Not Used - reserved [RFC1661]
8021 Internet Protocol Control Protocol
8023 OSI Network Layer Control Protocol
8025 Xerox NS IDP Control Protocol
8027 DECnet Phase IV Control Protocol
8029 AppleTalk Control Protocol
802b Novell IPX Control Protocol
802d Reserved
802f Reserved
8031 Bridging NCP
8033 Stream Protocol Control Protocol
8035 Banyan Vines* Control Protocol
8037 Reserved till 1993
8039 Reserved
803b Reserved
803d Multilink Control Protocol
803f NetBIOS Framing Control Protocol
807d Not Used - reserved [RFC1661]
8041 Cisco Systems Control Protocol
8043 Ascom Timeplex
8045 Fujitsu LBLB Control Protocol
8047 DCA Remote Lan Network Control Protocol (RLNCP)
8049 Serial Data Control Protocol (PPP-SDCP)
804b SNA over 802.2 Control Protocol
804d SNA Control Protocol
804f IP6 Header Compression Control Protocol
006f Stampede Bridging Control Protocol
80cf Not Used - reserved [RFC1661]
80fb Compression on single link in multilink group control
80fd Compression Control Protocol
80ff Not Used - reserved [RFC1661]
c021 Link Control Protocol
c023 Password Authentication Protocol
c025 Link Quality Report
c027 Shiva(R) Password Authentication Protocol
c029 CallBack Control Protocol (CBCP)
c081 Container Control Protocol [KEN]
c223 Challenge Handshake Authentication Protocol
c281 Proprietary Authentication Protocol [KEN]
c26f Stampede Bridging Authorization Protocol
c481 Proprietary Node ID Authentication Protocol [KEN]
Protocol field values in the 0xxx to 3xxx range identify the network-layer protocol of specific datagrams, and values in the 8xxx
to bxxx range identify datagrams belonging to the associated Network Control Protocol (NCP), if any.
It is recommended that values in the 02xx to 1exx and xx01 to xx1f ranges not be assigned, as they are compression inefficient.
Protocol field values in the 4xxx to 7xxx range are used for protocols with low volume traffic, which has no associated NCP.
Protocol field values in the cxxx to exxx range identify datagrams as Control Protocols (such as LCP).
==========================
PPP CODES for LCP, IPCP, CCP, ATCP, and so forth
The Point-to-Point Protocol (PPP) Link Control Protocol (LCP), [146] the Compression Control Protocol (CCP), Internet Protocol
Control Protocol (IPCP), [147] and other control protocols, contain an 8-bit Code field that identifies the type of packet. These
Codes are assigned as follows:
Code Packet Type
1 Configure-Request
2 Configure-Ack
3 Configure-Nak
4 Configure-Reject
5 Terminate-Request
6 Terminate-Ack
7 Code-Reject
8 * Protocol-Reject
9 * Echo-Request
10 * Echo-Reply
11 * Discard-Request
12 * Identification
13 * Time-Remaining
14 + Reset-Request
15 + Reset-Reply
 LCP Only
+ CCP Only
==================================
PPP LCP Configuration Option Types
The Point-to-Point Protocol (PPP) Link Control Protocol (LCP) specifies a number of Configuration Options [146], which are
distinguished by an 8-bit Type field. These Types are assigned as follows:
Type Configuration Option
1 Maximum-Receive-Unit
2 Async-Control-Character-Map
3 Authentication-Protocol
4 Quality-Protocol
5 Magic-Number
6 RESERVED
7 Protocol-Field-Compression
8 Address-and-Control-Field-Compression
9 FCS-Alternatives
10 Self-Describing-Pad
11 Numbered-Mode
12 Multilink-Procedure
13 Callback
14 Connect-Time
15 Compound-Frames
16 Nominal-Data-Encapsulation
17 Multilink-MRRU
18 Multilink-Short-Sequence-Number-Header-Format
19 Multilink-Endpoint-Discriminator
20 Proprietary [KEN]
21 DCE-Identifier [SCHNEIDER]
23 Link Discriminator (used by BACP)
PPP, LCP, FCS Alternatives
The Point-to-Point Protocol (PPP) Link Control Protocol (LCP) FCS-Alternatives Configuration Option contains an 8-bit Options
field, which identifies the FCS used. These are assigned as follows:
Bit FCS
1 Null FCS
2 CCITT 16-Bit FCS
4 CCITT 32-bit FCS
PPP LCP Callback Operation Fields
The Point-to-Point Protocol (PPP) Link Control Protocol (LCP) Callback Configuration Option contains an 8-bit Operations
field, which identifies the format of the message. These are assigned as follows:
Operation Description
0 Location determined by user authentication
1 Dialing string
2 Location identifier
3 E.164 number
4 X.500 distinguished name
5 Unassigned
6 Location is determined during CBCP negotiation
===================================
PPP, IPCP Configuration Option Types
The Point-to-Point Protocol (PPP) Internet Protocol Control Protocol (IPCP) specifies a number of Configuration Options [147],
which are distinguished by an 8-bit Type field. These Types are assigned as follows:
Type Configuration Option
1 IP-Addresses (deprecated)
2 IP-Compression-Protocol
3 IP-Address
129 Primary-DNS-Address
130 Primary-NBNS-Address
131 Secondary-DNS-Address
132 Secondary-NBNS-Address
[name servier info is from RFC 1877]
===================================
PPP, ATCP Configuration Option Types
The Point-to-Point Protocol (PPP) Apple Talk Control Protocol (ATCP) specifies a number of Configuration Options
[RFC-1378], which are distinguished by an 8-bit Type field. These Types are assigned as follows:
Type Configuration Option
1 AppleTalk-Address
2 Routing-Protocol
3 Suppress-Broadcasts
4 AT-Compression-Protocol
5 Reserved
6 Server-information
7 Zone-information
8 Default-Router-Address
=========================
PPP Bridging Configuration Option Types
The Point-to-Point Protocol (PPP) Bridging Control Protocol (BCP) specifies a number of Configuration Options, which are
distinguished by an 8-bit Type field. These Types are assigned as follows:
Type Configuration Option
1 Bridge-Identification
2 Line-Identification
3 MAC-Support
4 Tinygram-Compression
5 LAN-Identification
6 MAC-Address
7 Spanning-Tree-Protocol
=======================
PPP Bridging MAC Types
The Point-to-Point Protocol (PPP) Bridging Control Protocol (BCP) contains an 8-bit MAC Type field, which identifies the MAC
encapsulated. These Types are assigned as follows:
Type MAC
0 Reserved
1 IEEE 802.3/Ethernet with cannonical addresses
2 IEEE 802.4 with cannonical addresses
3 IEEE 802.5 with noncannonical addresses
4 FDDI with noncannonical addresses
5-10 Reserved
11 IEEE 802.5 with cannonical addresses
12 FDDI with cannonical addresses
========================
PPP Bridging Spanning Tree
The Point-to-Point Protocol (PPP) Bridging Control Protocol (BCP) Spanning Tree Configuration Option contains an 8-bit
Protocol field, which identifies the spanning tree used. These are assigned as follows:
Protoco Spanning Tree
0 Null - no spanning tree protocol supported
1 IEEE 802.1D spanning tree protocol
2 IEEE 802.1G extended spanning tree protocol
3 IBM source route spanning tree protocol
4 DEC LANbridge 100 spanning tree protocol
References
[RFC1661] Simpson, W., Editor, "The Point-to-Point Protocol (PPP)," STD 51, RFC 1661, Daydreamer, July 1994.
[RFC1662] Simpson, W., Editor, "PPP in HDLC-like Framing," STD 51, RFC 1662, Daydreamer, July 1994.
[RFC1332] McGregor, G., "PPP Internet Control Protocol," RFC 1332, Merit, May 1992.
=================
From RFC 1962
Up-to-date values of the CCP Option Type field are specified in the most recent Assigned Numbers RFC [2]. Current values
are assigned as follows:
CCP Option Compression types
0 OUI
1 Predictor type 1
2 Predictor type 2
3 Puddle Jumper
4-15 Unassigned
16 Hewlett-Packard* PPC
17 Stac Electronics LZS*
18 Microsoft* PPC
19 Gandalf *FZA
20 V.42bis compression
21 BSD LZW Compress
255 Reserved
=================
From RFC 1552
IPXCP uses the same Configuration Option format defined for LCP [1] with a separate set of Options.
Up-to-date values of the IPXCP Option Type field are specified in the most recent Assigned Numbers RFC [2]. Current values
are assigned as follows:
1 IPX-Network-Number
2 IPX-Node-Number
3 IPX-Compression-Protocol
4 IPX-Routing-Protocol
5 IPX-Router-Name
6 IPX-Configuration-Complete
=========================
From RFC 2125 BAP/BACP (multilink bandwidth allocation protocol)
BACP Configuration Options
1 Favored-Peer (that is, multilink magic number negotiation)
BAP Control codes
01 Call-Request
02 Call-Response
03 Callback-Request
04 Callback-Response
05 Link-Drop-Query-Request
06 Link-Drop-Query-Response
07 Call-Status-Indication
08 Call-Status-Response
List of BAP datagrams and associated fields:
Datagram Mandatory fields Allowed options
Call-Request Link-Type No-Phone-Number
Call-Response Link-Type Phone-Delta
Callback-Request Link-Type Phone-Delta
Callback-Response Link-Type
Link-Drop-Query-Request Link-Discriminator
Link-Drop-Query-Response
Call-Status-Indication Call-Status Phone-Delta
Call-Status-Response
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