📄 rfc1010.txt
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Reynolds & Postel [Page 8] RFC 1010 - Assigned Numbers May 1987Domain System Parameters DOMAIN SYSTEM PARAMETERS The Internet Domain Naming System (DOMAIN) includes several parameters. These are documented in RFC 883 [61]. The CLASS parameter is listed here. The per CLASS parameters are defined in separate RFCs as indicated. Domain System Parameters: Decimal Name References ------- ---- ---------- 0 Reserved [PM1] 1 Internet [61,PM1] 2 Unassigned [PM1] 3 Chaos [PM1] 4-65534 Unassigned [PM1] 65535 Reserved [PM1]Reynolds & Postel [Page 9] RFC 1010 - Assigned Numbers May 1987ARPANET Logical Addresses ARPANET LOGICAL ADDRESSES The ARPANET facility for "logical addressing" is described in RFC 878 [57] and RFC 1005 [109]. A portion of the possible logical addresses are reserved for standard uses. There are 49,152 possible logical host addresses. Of these, 256 are reserved for assignment to well-known functions. Assignments for well-known functions are made by Joyce Reynolds. Assignments for other logical host addresses are made by the NIC. Logical Address Assignments: Decimal Description References ------- ----------- ---------- 0 Reserved [JBP] 1 The BBN Core Gateways [MB] 2-254 Unassigned [JBP] 255 Reserved [JBP]Reynolds & Postel [Page 10] RFC 1010 - Assigned Numbers May 1987ARPANET Link Numbers ARPANET LINK NUMBERS The word "link" here refers to a field in the original ARPANET Host/IMP interface leader. The link was originally defined as an 8-bit field. Later specifications defined this field as the "message-id" with a length of 12 bits. The name link now refers to the high order 8 bits of this 12-bit message-id field. The Host/IMP interface is defined in BBN Report 1822 [2]. The low-order 4 bits of the message-id field are called the sub-link. Unless explicitly specified otherwise for a particular protocol, there is no sender to receiver significance to the sub-link. The sender may use the sub-link in any way he chooses (it is returned in the RFNM by the destination IMP), the receiver should ignore the sub-link. Link Assignments: Decimal Description References ------- ----------- ---------- 0 Reserved [JBP] 1-149 Unassigned [JBP] 150 Xerox NS IDP [102,XEROX] 151 Unassigned [JBP] 152 PARC Universal Protocol [7,XEROX] 153 TIP Status Reporting [JGH] 154 TIP Accounting [JGH] 155 Internet Protocol [regular] [80,JBP] 156-158 Internet Protocol [experimental] [80,JBP] 159 Figleaf Link [JBW1] 160-194 Unassigned [JBP] 195 ISO-IP [52,RXM] 196-247 Experimental Protocols [JBP] 248-255 Network Maintenance [JGH]Reynolds & Postel [Page 11] RFC 1010 - Assigned Numbers May 1987IEEE 802 SAP Numbers IEEE 802 NUMBERS OF INTEREST Some of the networks of all classes are IEEE 802 Networks. These systems may use a Link Service Access Point (LSAP) field in much the same way the ARPANET uses the "link" field. Further, there is an extension of the LSAP header called the Sub-Network Access Protocol (SNAP). The IEEE likes to describe numbers in binary in bit transmission order, which is the opposite of the big-endian order used throughout the Internet protocol documentation. Assignments: Link Service Access Point Description References -------------------------- ----------- ---------- IEEE Internet binary binary decimal 00000000 00000000 0 Null LSAP [IEEE] 01000000 00000010 2 Indiv LLC Sublayer Mgt [IEEE] 11000000 00000011 3 Group LLC Sublayer Mgt [IEEE] 00100000 00000100 4 SNA Path Control [IEEE] 01100000 00000110 6 DOD IP [79,JBP] 01110000 00001110 14 PROWAY-LAN [IEEE] 01110010 01001110 78 EIA-RS 511 [IEEE] 01110001 10001110 142 PROWAY-LAN [IEEE] 01010101 10101010 170 SNAP [IEEE] 01111111 11111110 254 ISO DIS 8473 [52,JXJ] 11111111 11111111 255 Global DSAP [IEEE] These numbers (and others) are assigned by the IEEE Standards Office. The address is: IEEE Standards Office, 345 East 47th Street, New York, N.Y. 10017, Attn: Vince Condello. Phone: (212) 705-7092. At an ad hoc special session on "IEEE 802 Networks and ARP", held during the TCP Vendors Workshop (August 1986), an approach to a consistent way to send DoD-IP datagrams and other IP related protocols on 802 networks was developed.Reynolds & Postel [Page 12] RFC 1010 - Assigned Numbers May 1987IEEE 802 SAP Numbers Due to some evolution of the IEEE 802.2 standards and the need to provide for a standard way to do additional DoD-IP related protocols (such as the Address Resolution Protocol (ARP) on IEEE 802 network, the following new policy is established, which will replace the old policy (see RFC 960 and RFC 948 [108]). The new policy is for the Internet community to use the IEEE 802.2 encapsulation on 802.3, 802.4, and 802.5 networks by using the SNAP with an organization code indicating that the following 16 bits specify the EtherType code (where IP = 2048 (0800 hex), see Ethernet Numbers of Interest). Header ...--------+--------+--------+ MAC Header| Length | 802.{3/4/5} MAC ...--------+--------+--------+ +--------+--------+--------+ | Dsap=K1| Ssap=K1| control| 802.2 SAP +--------+--------+--------+ +--------+--------+---------+--------+--------+ |protocol id or org code =K2| Ether Type | 802.2 SNAP +--------+--------+---------+--------+--------+ The total length of the SAP Header and the SNAP header is 8-octets, making the 802.2 protocol overhead come out on a nice boundary. K1 is 170. The IEEE likes to talk about things in little-endian bit transmission order and specifies this value as 01010101. In big-endian order, as used in Internet specifications, this becomes 10101010 binary, or AA hex, or 170 decimal. K2 is 0 (zero). The use of the IP LSAP (K1 = 6) is to be phased out as quickly as possible.Reynolds & Postel [Page 13] RFC 1010 - Assigned Numbers May 1987Ethernet Numbers ETHERNET NUMBERS OF INTEREST Many of the networks of all classes are Ethernets (10Mb) or Experimental Ethernets (3Mb). These systems use a message "type" field in much the same way the ARPANET uses the "link" field. If you need an Ethernet type, contact the XEROX Corporation, 2300 Geng Road, Palo Alto, California 94303, ATTN: Ms. Pam Cance. Assignments: Ethernet Exp. Ethernet Description References ------------- ------------- ----------- ---------- decimal Hex decimal octal 512 0200 512 1000 XEROX PUP [7,XEROX] 513 0201 - - PUP Addr. Trans. [XEROX] 1536 0600 1536 3000 XEROX NS IDP [102,XEROX] 2048 0800 513 1001 DOD IP [80,JBP] 2049 0801 - - X.75 Internet [XEROX] 2050 0802 - - NBS Internet [XEROX] 2051 0803 - - ECMA Internet [XEROX] 2052 0804 - - Chaosnet [XEROX] 2053 0805 - - X.25 Level 3 [XEROX] 2054 0806 - - ARP [64,JBP] 2055 0807 - - XNS Compatability [XEROX] 2076 081C - - Symbolics Private [DCP1] 4096 1000 - - Berkeley Trailer [XEROX] 5632 1600 - - Valid [XEROX] 21000 5208 - - BBN Simnet [XEROX] 24577 6001 - - DEC MOP Dump/Load [XEROX] 24578 6002 - - DEC MOP Remote Console [XEROX] 24579 6003 - - DEC DECNET Phase IV [XEROX] 24580 6004 - - DEC LAT [XEROX] 24581 6005 - - DEC [XEROX] 24582 6006 - - DEC [XEROX] 32771 8003 - - Cronus VLN [100,DT15] 32772 8004 - - Cronus Direct [100,DT15] 32773 8005 - - HP Probe [XEROX] 32774 8006 - - Nestar [XEROX] 32784 8010 - - Excelan [XEROX] 32821 8035 - - Reverse ARP [40,JXM] 32824 8038 - - DEC LANBridge [XEROX] 32859 805B - - Stanford V Kernel experimental [XEROX] 32860 805C - - Stanford V Kernel production [XEROX] 32892 807C - - Merit Internodal [HWB] 32923 809B - - Appletalk [XEROX]Reynolds & Postel [Page 14] RFC 1010 - Assigned Numbers May 1987Ethernet Numbers 36864 9000 - - Loopback [XEROX] The standard for transmission of IP datagrams over Ethernets and Experimental Ethernets is specified in RFC 894 [50] and RFC 895 [66] respectively. NOTE: Ethernet 48-bit address blocks are now assigned by the IEEE. IEEE Standards Office, 345 East 47th Street, New York, N.Y. 10017, Attn: Vince Condello. Phone: (212) 705-7092.Reynolds & Postel [Page 15] RFC 1010 - Assigned Numbers May 1987Address Resolution Protocol ADDRESS RESOLUTION PROTOCOL PARAMETERS⌨️ 快捷键说明
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