chris@yarra.oz.au (Chris Jankowski) (05/16/89)
I am chasing an elusive delay problem when using PC-NFS telnet.
The PC broadcasts an Ethernet packet with type code field set to 8035 hex.
(It does that three times in 3.5s intervals - doing nothing in between, hence
the delay.)
Questions:
1. What is Ethernet type code 8035 hex?
(Analysing other packets I could find that type code 0800 hex points to IP,
and 0806 hex means ARP)
2. What document or standard defines relation between values in this field
and higher level protocols?
Chris Jankowski chris@yarra.oz.au
Pyramid Technology Australia - Melbournemwn@mike.ufnet.ufl.edu (Michael Nora) (05/17/89)
Ethernet type code 8035 is Reverse ARP - your machine knows it's Ethernet
address, and is asking a server who knows about him to provide him with an IP
address.
--
Michael Nora | Internet: mwn@mike.ufnet.ufl.edu
University of Florida | UUCP: uhmmm .. beats the hell outa me ???
Data & Video Network | MaBellNet: (904) 335-8312 {or 8300}dfc@hpindda.HP.COM (Don Coolidge) (05/17/89)
>1. What is Ethernet type code 8035 hex?
RARP - Reverse Address Resolution Protocol. Packets go out saying, "This
is my Ethernet address. What's my IP address? RARP server, please respond."
A PC is likely to send a fair number of those packets. It'll be an especially
large number over time if there's no server on the LAN to respond.
Don CoolidgeArmstrong.WBST128@XEROX.COM (05/18/89)
Ethernet type 8035 hex is officially registered to Stanford University,
with Dave Cheriton as the contact.
Note that it is (unfortunately) fairly common to have people building
Ethernet applications without registering their Ethernet type. Such people
guessing at an unused type often clash with officially registered types.
Hence, these packets from your PC may have nothing to do with Stanford or
Cheriton. Should this turn out to be true, and you discover the vendor
using 8035 hex, they should be strongly encouraged to obtain a registered
type.
Good luck!
Cheers,
Susieedguer@charlie.CES.CWRU.Edu (Aydin Edguer) (05/18/89)
8035 is an RARP packet. > 2. What document or standard defines relation between values in this field > and higher level protocols? The document you are looking for is RFC 1010 - Assigned Numbers. In this document you will find a section ETHERNET NUMBERS OF INTEREST (pg 13). This is just the list of the ethernet types assigned by XEROX at the time (May 1987). There are other, unassigned types in use. -- Aydin Edguer +1 216 368 6123 edguer@alpha.ces.cwru.edu Department of Computer Engineering, Crawford Hall, Case Western Reserve Univ.
todds@cognos.UUCP (Todd Sandor) (05/24/89)
In article <2818@yarra.oz.au> chris@yarra.oz.au (Chris Jankowski) writes: > >1. What is Ethernet type code 8035 hex? It is the RARP, for Reverse Address Resolution Protocol, see below--this was from the net. Future publications of this information will probably be as a TCP/IP Internet RFC, rather than email to this mailing list. If you wish to comment on the format in which this data should be presented, or if you wish to be placed on a private mailing list for these updates, please send me mail at Urbaniak@BBN.COM, or US Mail at Bolt, Beranek & Newman, Inc. 10 Fawcett Street Cambridge, MA 02138 attn: Walter Urbaniak, MS021 Some Known Ethernet and IEEE802.3 "Type" Fields 3/16/89 The 13th and 14th octets of an Ethernet or IEEE802.3 packet (after the preamble) consist of the "Type" or "Length" field. These values are managed by XEROX. Some assignments are public, others private. Current information includes: Xerox Public Ethernet Packet Type documentation; IEEE802.3 Std; NIC RFC960; contributions from network managers and vendors. Hex 0000-05DC IEEE802.3 Length Field (0.:1500.) 0200 Xerox PUP (conflicts with IEEE802.3 Length Field range) (see 0A00) 0201 Xerox PUP Address Translation (conflicts ...) (see 0A01) 0600 Xerox NS IDP * 0800 DOD Internet Protocol (IP) * # 0801 X.75 Internet 0802 NBS Internet 0803 ECMA Internet 0804 CHAOSnet 0805 X.25 Level 3 0806 Address Resolution Protocol (ARP) * (for IP and for CHAOS) 0807 XNS Compatibility 081C Symbolics Private 0888-088A Xyplex 0900 Ungermann-Bass network debugger 0A00 Xerox IEEE802.3 PUP 0A01 Xerox IEEE802.3 PUP Address Translation 0BAD Banyan Systems 1000 Berkeley Trailer negotiation 1001-100F Berkeley Trailer encapsulation for IP 1600 VALID system protocol * 5208 BBN Simnet Private % 6000 DEC unassigned, experimental 6001 DEC Maintenance Operation Protocol (MOP) Dump/Load Assistance 6002 DEC Maintenance Operation Protocol (MOP) Remote Console 6003 DECNET Phase IV, DNA Routing 6004 DEC Local Area Transport (LAT) 6005 DEC diagnostic protocol (at interface initialization?) 6006 DEC customer protocol 6007 DEC Local Area VAX Cluster (LAVC), System Communication Architecture (SCA) 6008 DEC unassigned (AMBER?) 6009 DEC unassigned (MUMPS?) 6010-6014 3Com 7000 Ungermann-Bass download 7002 Ungermann-Bass diagnostic/loopback 7020-7029 LRT 7030 Proteon 8003 Cronus VLN 8004 Cronus Direct 8005 HP Probe protocol 8006 Nestar 8008 AT&T 8010 Excelan 8013 Silicon Graphics diagnostic 8014 Silicon Graphics network games 8015 Silicon Graphics reserved 8016 Silicon Graphics XNS NameServer, bounce server 8019 Apollo DOMAIN 802E Tymshare 802F Tigan 8035 Reverse Address Resolution Protocol (RARP) 8036 Aeonic Systems 8038 DEC LanBridge Management 8039 DEC unassigned (DSM/DTP?) 803A DEC unassigned (Argonaut Console?) 803B DEC unassigned (VAXELN?) 803C DEC unassigned (NMSV? DNA Naming Service?) 803D DEC Ethernet CSMA/CD Encryption Protocol 803E DEC unassigned (DNA Time Service?) 803F DEC LAN Traffic Monitor Protocol 8040 DEC unassigned (NetBios Emulator?) 8041 DEC unassigned (MS/DOS?, Local Area System Transport?) 8042 DEC unassigned 8044 Planning Research Co. 8046 AT&T 8047 AT&T 8049 ExperData 805B Stanford V Kernel, experimental 805C Stanford V Kernel, production 805D Evans & Sutherland 8060 Little Machines 8062 Counterpoint Computers 8065 University of Massachusetts, Amherst 8066 University of Massachusetts, Amherst 8067 Veeco Integrated Automation 8068 General Dynamics 8069 AT&T 806A Autophon 806C ComDesign 806D Compugraphic 806E-8077 Landmark Graphics 807A Matra 807B Dansk Data Elektronik 807C Merit Internodal (or Univ of Michigan?) 807D-807F Vitalink 8080 Vitalink TransLAN III Management 8081-8083 Counterpoint Computers 809B EtherTalk (AppleTalk over Ethernet) 809C-809E Datability 809F Spider Systems 80A3 Nixdorf Computers 80A4-80B3 Siemens Gammasonics 80C0-80C3 DCA (Digital Comm. Assoc.) Data Exchange Cluster 80C6 Pacer Software 80C7 Applitek 80C8-80CC Intergraph 80CD-80CE Harris 80CF-80D2 Taylor Instrument 80D3-80D4 Rosemount 80DD Varian 80DE-80DF Integrated Solutions Transparent Remote File System (TRFS) 80E0-80E3 Allen-Bradley 80E4-80F0 Datability 80F2 Retix 80F3 AppleTalk Address Resolution Protocol (AARP) 80F4-80F5 Kinetics 80F7 Apollo 80FF-8103 Wellfleet 8107 Symbolics Private 8108 Symbolics Private 8109 Symbolics Private 8130 Waterloo Microsystems 8131 VG Laboratory Systems 8137 Novell (old) 8138 Novell 8139-813D KTI 9000 Loopback (Configuration Test Protocol) 9001 Bridge Communications XNS Systems Management 9002 Bridge Communications TCP/IP Systems Management 9003 Bridge Communications FF00 BBN VITAL-LanBridge cache wakeups % -- Todd Sandor Voice: (613) 738-1338 ext 2704 P.O. Box 9707 Cognos Incorporated FAX: (613) 738-0002 3755 Riverside Dr. uucp: todds@cognos || uunet!mitel!scs!cognos!todds Ottawa, Ontario Steady as she goes! CANADA K1G 3Z4